Quantitative Mass Spectrometry in Biochemistry and Medicine

Biochemical applications of mass spectrometry

1973 • 730 citations

Advances in prostaglandin and thromboxane research

1976 • 602 citations

New picogram detection system based on a mass spectrometer with an external ionization source at atmospheric pressure

1973 • 534 citations

Atmospheric pressure ionization mass spectrometry. Corona discharge ion source for use in a liquid chromatograph-mass spectrometer-computer analytical system

1975 • 378 citations

Principles of Field Ionization and Field Desorption Mass Spectrometry

1977 • 334 citations

Use of a Mass Spectrometer as a Detector and Analyzer for Effluent Emerging from High Temperature Gas Liquid Chromatography Columns.

1964 • 325 citations

Mass fragmentography

1968 • 303 citations

Mass Spectrometric Determination of Unresolved Components in Gas Chromatographic Effluents.

1966 • 302 citations

Active transport of Diodrast and phenolsulfonphthalein from cerebrospinal fluid to blood

1961 • 301 citations

Introduction to modern liquid chromatography

1975 • 298 citations

Computer evaluation of continuously scanned mass spectra of gas chromatographic effluents

1970 • 252 citations

Bile-Salt Metabolism in the Newborn

1973 • 243 citations

Simultaneous measurement of endogenous and deuterium-labeled tracer variants of choline and acetylcholine in subpicomole quantities by gas chromatography/mass spectrometry

1973 • 226 citations

Quantitative mass spectrometry

1978 • 206 citations

Atmospheric Pressure Ionization (API) Mass Spectrometry. Solvent-Mediated Ionization of Samples Introduced in Solution and in a Liquid Chromatograph Effluent Stream

1974 • 200 citations

Practical Spectroscopy Series

1948 • 200 citations

Amitriptyline plasma levels and therapeutic response

1976 • 194 citations

Lead Metabolism in the Normal Human: Stable Isotope Studies

1973 • 186 citations

High-Resolution Mass Spectra of Compounds Emerging from a Gas Chromatograph.

1964 • 177 citations

Quantitative metabolic profiling of urinary organic acids by gas chromatography-mass spectrometry. Comparison of isolation methods

1975 • 151 citations

Quantitative gas chromatography of prostaglandin E1 at the nanogram level: Use of deuterated carrier and multiple-ion analyzer

1970 • 147 citations

Mass fragmentography of dopamine and 6-hydroxydopamine

1974 • 135 citations

Identification and Distribution of Tryptamine in the Rat

1974 • 135 citations

A new technique for the detection of metabolites labelled by the isotope13C using mass fragmentography

1976 • 133 citations

Quantitation of adrenaline in rat brain nuclei and areas by mass fragmentography

1974 • 128 citations

Chemical derivatization in gas chromatography

1975 • 128 citations

Choline and acetylcholine: Handbook of chemical assay methods

1975 • 125 citations

Ion specific detection of internal standards labeled with stable isotopes

1971 • 116 citations

Molecular weight determination by cationisation

1975 • 114 citations

Mass spectrometry in biochemistry and medicine

1974 • 112 citations

On-line computer controlled multiple ion detection in combined gas chromatography-mass spectrometry

1973 • 109 citations

Methods for quantitative analysis of PGF2α, PGE2, 9α,11α-dihydroxy-15-keto-prost-5-enoic acid and 9α,11α,15-trihydroxy-prost-5-enoic acid from body fluids using deuterated carriers and gas chromatography-mass spectrometry

1973 • 109 citations

Mass-fragmentography of nanogram quantities of biogenic amine metabolites in human cerebrospinal fluid and whole rat brain

1975 • 108 citations

The problem of specificity and selectivity of alkylating cytostatics; studies on N-2-chloroethylamido-oxazaphosphorines

1977 • 108 citations

Quantitative determination of 5-hydroxyindole-3-acetic acid in cerebrospinal fluid by gas chromatography-mass spectrometry

1972 • 107 citations

Serum cholesterol determination by mass fragmentography

1974 • 106 citations

Mass spectrometric determination of picomole amounts of prostaglandins E2 and F2α using synthetic deuterium labeled carriers

1971 • 104 citations

High-accuracy determination of calcium in blood serum by isotope dilution mass spectrometry

1972 • 104 citations

Felddesorptions-Massenspektrometrie

1975 • 103 citations

Simultaneous quantification of homovanillic acid and 5-hydroxyindoleacetic acid in cerebrospinal fluid by mass fragmentography

1974 • 99 citations

Quantitative mass spectrometry in life sciences

1977 • 97 citations

Electron beam ionization mass fragmentographic analysis of tricyclic antidepressants in human plasma

1976 • 97 citations

Techniques of combined gas chromatography/mass spectrometry: Applications in organic analysis

1973 • 96 citations

Quantification of phencyclidine in body fluids by gas chromatography chemical ionization mass spectrometry and identification of two metabolites

1975 • 96 citations

Glucose Naturally Labeled with Carbon-13: Use for Metabolic Studies in Man

1973 • 95 citations

Quantitation of Δ1-tetrahydrocannabinol in plasma from cannabis smokers

1973 • 93 citations

Quantification of the major urinary metabolite of the E prostaglandins by mass spectrometry: Evaluation of the method's application to clinical studies

1976 • 92 citations

Assay by multiple ion detection of phenylethylamine and phenylethanolamine in rat brain

1974 • 89 citations

Combined Use of Gas Chromatography, Mass Spectrometry, and Computer in Diagnosis and Studies of Metabolic Disorders

1972 • 86 citations

Simultaneous determination of propranolol and 4-hydroxypropranolol in plasma by mass fragmentography

1975 • 85 citations

Mass fragmentographic quantitation of glutamic acid and γ-aminobutyric acid in cerebellar nuclei and sympathetic ganglia of rats

1976 • 85 citations

On field desorption mass spectrometry of salts

1975 • 85 citations

Regional concentrations of choline and acetylcholine in the rat brain

1974 • 80 citations

Gas-chromatographic determination of homovanillic acid in human cerebrospinal fluid by electron capture detection and by mass fragmentography with a deuterated internal standard

1972 • 80 citations

Stable Isotope Tracers in the Life Sciences and Medicine

1973 • 76 citations

Steroid metabolism in testis tissue: concentrations of unconjugated and sulfated neutral steroids in boar testis

1974 • 74 citations

Quantitative determination of 4-hydroxy-3-methoxyphenyl glycol and its conjugates in cerebrospinal fluid by mass fragmentography

1973 • 74 citations

Test for Alcoholic Cirrhosis by Conversion of [14C] or [13C]Galactose to Expired CO2

1976 • 73 citations

The use of deuterated phenylalanine for the elucidation of the phenylalanine-tyrosine metabolism

1972 • 72 citations

Optimum procedure for the determination of selenium in biological specimens using selenium-77m neutron activation

1973 • 71 citations

Gas phase microanalysis of zooecdysones

1973 • 71 citations

Computer-assisted assignment of retention indexes in gas chromatography-mass spectrometry and its application to mixtures of biological origin

1974 • 70 citations

Simultaneous measurement of plasma concentratons of lidocaine and its deethylated metabolite by mass fragmentography

1972 • 69 citations

Femtomole level of analysis of biogenic amines and amino acids using functional group mass spectrometry

1974 • 69 citations

Mass fragmentographic determination of 4-hydroxy-3-methoxyphenylglycol (HMPG) in urine, cerebrospinal fluid, plasma and tissues using a deuterium-labelled internal standard

1975 • 67 citations

Novel peak matching technique by means of a new and combined multiple ion detector-peak matcher device. Elemental analyses of compounds in submicrogram quantities without prior isolation

1971 • 65 citations

Field desorption mass spectrometry of oligosaccharides in the presence of metallic salts

1977 • 65 citations

Eine Kombination von Graschromatograph und Massenspektrometer zur Analyse organischer Stoffgemische

1961 • 65 citations

ANALYTICAL THEORY

1976 • 62 citations

Mass fragmentography as an application of gas-liquid chromatography—mass spectrometry in biological research

1972 • 60 citations

The measurement of urinary digoxin and dihydrodigoxin by radioimmunoassay and by mass spectroscopy

1975 • 60 citations

Field Desorption Mass Spectrometry and Its Application in Biochemical Analysis

1977 • 58 citations

Determination of the Structures of Organic Molecules and Quantitative Analyses with the Field Ionization Mass Spectrometer

1969 • 57 citations

Urinary excretion of 4-hydroxy-3-methoxyphenylglycol and 4-hydroxy-3-methoxyphenylethanol in man and rat

1973 • 57 citations

Gas chromatograph-mass spectrometer-accelerating voltage alternator system for the measurement of stable isotope ratios in organic molecules

1972 • 57 citations

Simultaneous measurement of imipramine and desipramine by selected ion recording with deuterated internal standards

1976 • 57 citations

Mass fragmentographic determination of eleven estrogens in the body fluids of pregnant and nonpregnant subjects

1974 • 56 citations

Rapid computerized identification of compounds in complex biological mixtures by gas chromatography—mass spectrometry

1974 • 56 citations

The Scope of Mass Spectrometry in Clinical Chemistry

1975 • 55 citations

Zur gas-chromatographisch-massenspektrometrischen Bestimmung von Steroidhormonen in Körperflüssigkeiten unter Verwendung eines Multiple Ion Detectors (Fragmentographie)

1970 • 54 citations

Biomedical Applications of Selected Ion Monitoring

1975 • 54 citations

Quantitative determination of prostaglandins A, B and E in the sub-nanogram range

1973 • 53 citations

Mass fragmentography as reference method in clinical steroid assay

1975 • 53 citations

Plasma cortisol determination by mass fragmentography

1974 • 53 citations

Quantitative microanalysis of capsaicin, dihydrocapsaicin and nordihydrocapsaicin using mass fragmentography

1976 • 52 citations

Improvements In Quantitative Gas Phase Analysis Of Catecholamines In the Picomole Range By Electron-Capture Detection and Mass Fragmentography Of Their Pentafluorobenzylimine-Trimethylsilyl Derivatives

1974 • 50 citations

Quantitative Determination of Nortriptyline And Desmethylnortriptyline In Human Plasma By Combined Gas Ciiromatography - Mass Spectrometry

1971 • 49 citations

Display-oriented data system for multiple ion detection with gas chromatography-mass spectrometry in quantifying biomedically important compounds

1973 • 48 citations

Quantitation of a urinary tetrasaccharide by gas chromatography and mass spectrometry

1976 • 48 citations

Gas chromatographic evaluation of the influence of oxotremorine upon the regional distribution of acetylcholine in rat brain¹

1970 • 47 citations

Computer controlled ion counting isotope ratio mass spectrometer

1975 • 47 citations

Simultaneous qualitative and quantitative analyses of bile acids by mass chromatography

1974 • 46 citations

Quantitative determination of salbutamol in plasma, as either its trimethylsilyl ort-butyldimethylsilyl ether, using a stable isotope multiple ion recording technique

1976 • 45 citations

Gas-liquid chromatographic and mass fragmentographic determination of catecholamines in human plasma

1975 • 45 citations

Quantitative determination of guanethidine and other guanido-containing drugs in biological fluids by gas chromatography with flame ionization detection and multiple ion detection

1974 • 45 citations

Qualitative and quantitative mass spectrometry of some noncatecholic biogenic amines and related compounds as their dansyl derivatives

1974 • 45 citations

Determination of alkali elements by field desorption mass spectrometry

1977 • 44 citations

Assay of liver microsomal cholesterol 7α-hydroxylase using deuterated carrier and gas chromatography-mass spectrometry

1974 • 44 citations

Preparation of deuterium labelled catecholamines, catecholamine precursors and metabolites for use as internal standards in mass fragmentographic determination and for turnover studies

1974 • 43 citations

Determination of plasma testosterone by combined gas chromatography-mass spectrometry

1974 • 43 citations

Isolation of Drugs and Drug Metabolites from Biological Fluids by Use of Salt-Solvent Pairs

1974 • 43 citations

Single and multiple ion recording techniques for the analysis of diphenylhydantoin and its major metabolite in plasma

1977 • 43 citations

Deuterium substituted amphetamine as an internal standard in a gas chromatographic/mass spectrometric (GC/MS) assay for amphetamine

1973 • 43 citations

A quantitative method for the estimation of testosterone and progesterone in human plasma, using the gas chromatograph/mass spectrometer combination with single ion monitoring

1974 • 42 citations

Quantitative determination of enantiomeric compounds. I—simultaneous measurement of the optical isomers of amphetamine in human plasma and saliva using chemical ionization mass spectrometry

1977 • 42 citations

Quantitative Analysis of Morphine in Urine by Gas Chromatography-Chemical Ionization-Mass Spectrometry, with [N-C2H3]Morphine as an Internal Standard

1974 • 42 citations

Plasma and cerebrospinal fluid concentrations of pentazocine in patients: assay by mass fragmentography

1974 • 41 citations

Versatile computer generated variable accelerating voltage circuit for magnetically scanned mass spectrometers. Use for assays in the picogram range and for assays of stable isotope tracers

1973 • 41 citations

Use of Stable Isotopes in Measuring Low Concentrations of Drugs and Drug Metabolites by GC—MS—COM Procedures

1973 • 41 citations

Simultaneous mass fragmentographic determination of 3, 4-dihydroxyphenylacetic acid and 4-hydroxy-3-methoxyphenylacetic acid in brain tissue

1974 • 41 citations

Direct (non-chromatographic) quantification of drugs and their metabolites from human plasma utilizing chemical lonization mass spectrometry and stable isotope labeling: Quinidine and lidocaine

1974 • 40 citations

Quantitative Felddesorptions-Massenspektrometrie VI

1978 • 40 citations

Applications of Field Desorption Mass Spectrometry in Inorganic Chemistry: Salts

1975 • 39 citations

A comparison of unlabelled and labelled internal standards for quantification by single and multiple ion monitoring

1975 • 39 citations

Quantitation of Propoxyphene and Its Major Metabolites in Heroin Addict Plasma after Large Dose Administration of Propoxyphene Napsylate

1975 • 39 citations

Bestimmung von Aldosteron im Plasma des Menschen unter Verwendung der Kombination Gas-Chromatographie/Massenspektrometrie

1972 • 39 citations

Gas chromatographic-mass fragmentographic determination of “steady-state” plasma levels of imipramine and desipramine in chronically treated patients

1975 • 39 citations

Mass fragmentographic assay for .DELTA.9-tetrahydrocannabinol in plasma

1974 • 39 citations

Analysis of Tissue Steroids By Liquid-Gel Chromatography and Computerized Gas Chromatography-Mass Spectrometry

1974 • 39 citations

Analysis of twelve amino acids in biological fluids by mass fragmentography

1974 • 39 citations

Validation of Use of 11, 12-2H-Labeled Chenodeoxycholic Acid in Isotope Dilution Measurements of Bile Acid Kinetics in Man

1975 • 38 citations

Identification of free and conjugated 3-methoxy-4-hydroxyphenylglycol (MOPEG) in rat brain by gas chromatography and mass fragmentography

1973 • 37 citations

Isotope effects in enzymic N-demethylation of tertiary amines

1975 • 37 citations

Determination of barbiturates and their metabolites in small plasma samples by gas chromatography-mass spectrometry

1973 • 36 citations

Analysis of biogenic amines and their metabolites by gas chromatography-chemical ionization mass spectrometry

1974 • 36 citations

Piperidine Increase in the Brain of Dormant Mice

1974 • 36 citations

A reproducible gas chromatographic mass spectrometric assay for low levels of methylphenidate and ritalinic acid in blood and urine

1975 • 36 citations

Application of Quantitative GC–Mass Spectrometry to Study of Pharmacokinetics of Amphetamine and Phentermine

1973 • 35 citations

Validation of routine methods for serum progesterone determination using mass fragmentography

1975 • 35 citations

Radioimmunoassay and related methods

1973 • 34 citations

Mass fragmentographic determination of unlabeled and deuterium labeled methadone in human plasma. Possibilities for measurement of steady state pharmacokinetics

1975 • 34 citations

Method for the measurement of prostaglandin F2.alpha. in biological fluids by gas chromatography-mass spectrometry

1973 • 33 citations

A mass fragmentographic method for the quantitative evaluation of brain prostaglandin biosynthesis

1975 • 33 citations

Hormones steroides de la surrenale de rat: Analyse des 18-hydroxycorticosteroides par chromatographie gaz-liquide couplee a la spectrometrie de masse et pa fragmentographie de masse

1974 • 33 citations

Determination of bufuralol and its metabolites in plasma by mass fragmentography and by gas chromatography with electron capture detection

1976 • 33 citations

Estimation of picomole quantities of piperidine in tissues

1974 • 32 citations

Quantitative Felddesorptions-Massenspektrometrie. II

1977 • 32 citations

Computerized quantitation of drugs by gas chromatography-mass spectrometry

1973 • 31 citations

The quantitation of cyclophosphamide in human blood and urine by mass spectrometry-stable isotope dilution

1975 • 30 citations

Mass fragmentographic determination of homovanillic acid in tissues and body fluids using the deuterium labeled species as internal standard

1973 • 30 citations

Qualitative and quantitative analyses of bansyl derivatives of dopamine and some of its metabolites in urine samples by electron impact and field desorption mass spectrometry

1976 • 30 citations

Recording Mass Spectrometer for Process Analysis

1948 • 30 citations

Use of stable isotopes in pharmacology‐clinical pharmacology

1972 • 30 citations

Li⁺‐Anlagerung–eine schonende Methode zur Ionenbildung in der Felddesorptions‐Massenspektrometrie

1976 • 29 citations

Quantitation of up to 12 estrogens in 1–50 μl of pregnancy urine

1973 • 29 citations

Comparison of selective ion monitoring and repetitive scanning during gas chromatography-mass spectrometry

1973 • 29 citations

Strukturbestimmung organischer Moleküle und quantitative Analysen mit dem Feldionisations‐Massenspektrometer

1969 • 29 citations

Identification of methaqualone metabolites from urine extract by gas chromatography-mass spectrometry

1972 • 29 citations

Gas chromatographic-mass spectrometric identification of N:N-dimethyltryptamine in urine samples from drug-free chronic schizophrenic patients and its quantitation by the technique of single (selective) ion monitoring

1973 • 28 citations

Fortran-based photographic emulsion calibration procedure for use in quantitative spectrometry

1975 • 28 citations

Anticonvulsant Drug Monitoring by GC-MS-COM Techniques

1974 • 28 citations

Thin-layer chromatography and high resolution selected ion monitoring for the analysis of C19 steroids in human hyperplastic prostate tissue

1975 • 28 citations

Introduction to Mass Spectrometry: Biomedical, Environmental and Forensic Applications

1977 • 27 citations

Acetylcholine: postmortem increases in rat brain regions

1976 • 27 citations

Selected ion monitoring for multicomponent analyses by computer control of accelerating voltage and magnetic field

1975 • 27 citations

Limits of detection of carbon-13 labelled drugs and their metabolites in human urine

1974 • 27 citations

Clinical Applications of Gas Chromatograph/Mass Spectrometer/Computer Systems

1975 • 27 citations

The use of stable isotopes in gas chromatography—mass spectrometric studies of drug metabolism

1974 • 27 citations

Anwendungen der Felddesorptions‐Massenspektrometrie in der anorganischen Chemie: Salze

1975 • 26 citations

Clinical biochemistry, principles and methods

1975 • 26 citations

Mass fragmentographic assay for 11-hydroxy-.DELTA.9-tetrahydrocannabinol from plasma

1976 • 26 citations

Mass fragmentography of 5-hydroxytryptophol and 5-methoxytryptophol in human cerebrospinal fluid

1975 • 25 citations

Determination of volatile constituents of human blood and tissue specimens by quantitative high-resolution mass spectrometry

1971 • 25 citations

Instrument Design Considerations and Clinical Applications of Stable Isotope Analysis

1971 • 25 citations

A selected bibliography of biomedical and environmental applications of stable isotopes. I—Deuterium 1971-1976

1978 • 25 citations

Direct determination of heavy elements in biological media by spark source mass spectrometry

1974 • 25 citations

Determination of phenformin in biological fluids using chemical ionization mass spectrometry

1974 • 24 citations

Nitrogen Transfer from a Diazoalkane to a Metal Center

1976 • 24 citations

Investigation of direct thin-layer chromatography-mass spectrometry as a drug analysis technique

1975 • 24 citations

Validation of methods for determination of urinary estriol during pregnancy using mass fragmentography

1975 • 24 citations

A rapid procedure for the isolation of drugs and drug metabolites from plasma

1972 • 23 citations

Deuterium isotope effects in the in vivo metabolism of cotinine

1974 • 23 citations

Quantitative Field Desorption Mass Spectrometry; Stable Isotope Dilution and Cationization

1977 • 23 citations

The development of a computer-assisted search for anomalous compounds (casac)

1975 • 22 citations

Simultaneous estimation of propoxyphene-d0 and propoxyphene-d2 levels by quantitative mass fragmentography. Potential utility in multidose investigations

1976 • 22 citations

Application of gas chromatography-mass spectrometry in routine and research in clinical chemistry

1974 • 22 citations

A method for the estimation of acetanilide, paracetamol and phenacetin in plasma and urine using mass fragmentography

1976 • 21 citations

Plasma phencyclidine pharmacokinetics in dog and monkey using a gas chromatography selected ion monitoring assay

1978 • 21 citations

Computerized mass fragmentography and peak matching

1974 • 21 citations

The use of solid probe chemical ionization mass spectrometry and gas chromatography-chemical ionization mass spectrometry in quantitation of drugs in biological fluids. Determination of tolbutamide and its metabolites in human plasma

1974 • 20 citations

Mass fragmentography of steroid hormones

1974 • 20 citations

Cesium Determination in Physiological Fluids and Tissues by Field Desorption Mass Spectrometry^≠

1978 • 20 citations

New bromisoval (bromural) metabolites in human urine: a-(cystein-S-yl)isovalerylurea, a-(N-acetylcystein-S-yl)isovalerylurea and a-(cysteamin-S-yl)isovaleric acid

1978 • 20 citations

Determination of pinazepam and its metabolites in serum, urine and brain by gas—liquid chromatography and mass spectrometry

1975 • 20 citations

Quantitative Felddesorptions‐Massenspektrometrie; Verdünnung mit stabilen Isotopen und Kationisierung

1977 • 20 citations

Gas chromatography of steroids and its clinical applications, including loading tests with deuterated compounds

1975 • 19 citations

Evidence for the lack of a carrier effect in the solvent extraction and determination of octopamine by gas chromatography mass spectrometry

1977 • 19 citations

Photographic quantitation in spark source mass spectrography using an on-line densitometer and ion intensity areas

1974 • 19 citations

Quantitative field desorption mass spectrometry. V—Discussion of methodology and examples of applications

1978 • 19 citations

MASS FRAGMENTOGRAPHIC ASSAY OF HOMOVANILLIC ACID IN BRAIN TISSUE¹

1973 • 19 citations

Selected ion monitoring assay for the bronchodilator pirbuterol

1976 • 18 citations

Gas chromatographic-mass fragmentographic determination of trazodone in rat plasma

1975 • 18 citations

Multiple ion detection by accelerating voltage alternation in conjunction with voltage sweeping

1974 • 18 citations

Studies on the mass fragmentographic determination of plasma estriol

1974 • 18 citations

High resolution field desorption mass spectrometry

1976 • 18 citations

Mass spectrometric isotope ratio measurements and peak area integration using the peak-switching feature of the AEI MS-902

1972 • 18 citations

Comparison of the EMIT (enzyme multiplied immunoassay technique) opiate assay and a gas-chromatographic--mass-spectrometric determination of morphine and codeine in urine.

1976 • 18 citations

Gas Chromatograph—Mass Spectrometer—Computer System for Detection and Identification of Abnormal Metabolic Products in Physiological Fluids

1971 • 18 citations

Mass fragmentography of morphine and 6-monoacetylmorphine in blood with a stable isotope internal standard

1974 • 17 citations

The measurements of propantheline ion in biological fluids after administering propantheline bromide to man

1977 • 17 citations

Analysis of steroids in biological fluids by computer-aided gas-liquid chromatography—Mass spectrometry

1974 • 17 citations

Specific tlc, gc, and gc-ms methods for kinetic studies with COMT

1974 • 17 citations

Quantitative Spurenanalyse von Metallen mit Felddesorptions‐Massenspektrometrie

1977 • 17 citations

Automatic Mass-Spectrometric Analysis: Preliminary Report on Development of a Novel Mass-Spectrometric System for Biomedical Applications

1974 • 16 citations

Use of gas chromatography-mass spectrometry for the diagnosis and study of metabolic disorders

1974 • 16 citations

Physikalische Methoden in der Chemie: Massenspektrometrie II

1976 • 16 citations

Gas chromatography mass spectrometry assay for ketamine and its metabolites in plasma

1977 • 15 citations

Solid-state isotope dilution in spark source mass spectrometry

1975 • 15 citations

Ein kontinuierliches Verfahren zur massenspektrometrischen Bestimmung gaschromatographisch vorgetrennter Substanzgemische

1959 • 15 citations

Quantitative determination of homovanillic acid in serum by mass fragmentography

1973 • 15 citations

Determination of bupivacaine in human fetal and neonatal blood samples by quantitative single ion monitoring

1977 • 14 citations

Measurement of prostaglandin F2α in human cerebrospinal fluid by single ion monitoring

1976 • 14 citations

Qualitative and quantitative mass spectrometry of some biologically important trace metals as their tetraphenylporphyrin chelates

1976 • 14 citations

Quantitative Trace Analysis of Metals by Field Desorption Mass Spectrometry

1977 • 14 citations

Determination of vincamine in plasma by selected ion monitoring

1978 • 14 citations

Determination of phenylbutazone, tolbutamide and metabolites in plasma and urine using chemical ionization mass spectrometry

1977 • 14 citations

A Multiple Specific Ion Detector and Analog Data Processor For a Gas Chromatograph/Quadrupole Mass Spectrometer System

1973 • 14 citations

Real-Time Gas Chromatography/High Resolution Mass Spectrometry and its Application to the Analysis of Physiological Fluids

1974 • 14 citations

Detection and quantitative analysis of amphetamine

1974 • 13 citations

The use of isomeric compounds as internal standards for quantitative mass fragmentography of biological samples. Determination of homovanillic acid in cerebrospinal fluid and plasma

1974 • 13 citations

Inborn Errors of Metabolism— A Challenge to the Clinical Chemist

1975 • 13 citations

Direct analysis of stable isotopes with a quadrupole mass spectrometer

1974 • 12 citations

Gas-Chromatographic—Mass-Spectrometric Determination of Urinary Acid Profiles of Normal Young Adults. II. The Effect of Ethanol

1973 • 12 citations

Amobarbital metabolism in man determination ofN-hydroxyamobarbital and 3′-hydroxyamobarbital in urine by gas chromatography chemical ionization mass spectrometry

1977 • 12 citations

Method of Analysis of Urinary Steroids of Human Pregnancy by GLC and GC-MS of Sephadex LH-20 Chromatographic Fractions

1974 • 12 citations

The determination of ethanol in blood and urine by mass fragmentography

1974 • 11 citations

Logarithmische Rechentafeln

1969 • 11 citations

Report on the workshop sponsored by the committee for biological applications at the 23rd annual conference of the American society for mass spectrometry, Houston, May 1975

1975 • 11 citations

Determination of picomole quantities of methaqualone and 6-hydroxymethaqualone in urine

1975 • 11 citations

Quantitation of glycine in plasma and urine by chemical ionization mass ofragmentography

1976 • 10 citations

The direct determination of oestrogen and progesterone in human ovarian tissue by quantitative high resolution mass spectrometry

1976 • 10 citations

The analysis of ashed mammalian blood by high resolution spark source mass spectroscopy

1974 • 10 citations

The Use of a Solid Sampler in Chemical Ionization Mass Spectrometry for the Determination of Compounds Unstable Under Gas-Liquid Chromatographic Conditions-Analysis of Tolbutamide from Biological Fluid

1974 • 9 citations

Factors affecting the use of external standards for spark source mass spectrometry

1972 • 9 citations

Quantitative determination of aldonic and uronic acids in mixtures as deuterium-labelled alditol acetates by gas chromatography-mass spectrometry

1974 • 9 citations

Prospects for Mass Spectrometry in Clinical Chemistry

1975 • 8 citations

GAS CHROMATOGRAPHY--MASS SPECTROMETRY IN NEUROBIOLOGY

1974 • 8 citations

Naturally labeled 13C-glucose. Metabolic studies in human diabetes and obesity

1975 • 8 citations

Integrated Ion‐Current (IIC) Technique of Quantitative Mass Spectrometric Analysis: Chemical and Biological Applications

1973 • 7 citations

Studies on drug metabolism by use of isotopes. XIV. Mass spectrometric quantification of urinary metabolites of deuterated l-ephedrine in rabbits.

1975 • 7 citations

Comparative study of different methods of packaging liquid reagents

1973 • 7 citations

Source of the carboxamide nitrogen atom in 2-carboxamido-5-isopropoxycarbonylaminobenzimidazole, a metabolite of cambendazole

1974 • 7 citations

Mass spectrometry: techniques and applications

1973 • 7 citations

Analysis of bile acids by mass fragmentography. Application of 1:1 mixture technique by use of stable isotope labeled compounds.

1974 • 6 citations

The analysis of terbutaline in plasma and urine at therapeutic levels using mass fragmentography

1976 • 6 citations

Analysis of drug metabolites by gas chromatography-mass spectrometry using glass capillary columns

1975 • 6 citations

Sources of variability in the use of 13C-labeled substrates as ?breath test? in clinical research and diagnosis

1976 • 6 citations

Simultaneous estimation of testosterone, progesterone and androstenedione by gas chromatography-mass spectrometry with a single ion detection correlation with radioimmunoassay

1974 • 6 citations

Methods for the Quantitative Estimation of Nanogram and Subnanogram Amounts of Steroids in Blood and Urine

1974 • 5 citations

Field Desorption Mass Spectrometry of Pharmacologically Active Salts

1977 • 5 citations

Arzneimittelstoffwechseluntersuchungen mit der Massenspektrometrie

1974 • 4 citations

The measurement of acetanilide in plasma by spectrophotometric and selected ion monitoring methods

1977 • 4 citations

The quantitation of β-aminoisobutyric acid in urine by mass fragmentography

1973 • 4 citations

Isotope dilution mass-spectrometry of potassium

1973 • 3 citations

31. Assay of hormonal steroids by gas chromatography mass spectrometry using stable isotope internal standards

1974 • 2 citations

Mass Spectromery in Biochemistry and Medicine

1975 • 2 citations

Drug metabolism

1975 • 2 citations

30. Steroid hormone assays of human tumour tissue by high resolution mass fragmentography

1974 • 2 citations