Evaluation of a rapid gas-chromatographic method for the simultaneous quantitative determination of ethosuximide, phenyletheylmalonediamide, carbamazepine, phenobarbital, primidone and diphenylhydantoin in human serum

1977 ◽  
Vol 77 (3) ◽  
pp. 307-316 ◽  
Author(s):  
R. Heipertz ◽  
H. Pilz ◽  
K. Eickhoff
Keyword(s):  
Quantitative Determination ◽  
Human Serum ◽  
Chromatographic Method ◽  
Gas Chromatographic Method

Gas Chromatographic Determination of N-Butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine and α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine in Formulations

1971 ◽  
Vol 54 (3) ◽  
pp. 711-712
Author(s):  
Martha Fuzesi
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Electron Capture ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Electron Capture Detector ◽  
Reference Solution ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-tolindine and α,α,α-trifluoro-2,6-dinitro-N,N-dipropyI-p-toluidine herbicides in formulations. The sample is extracted with benzene, and equal amounts of sample and reference solution in the same concentration range are analyzed by gas chromatography, using an electron capture detector and an SE-30/Diatoport S column. The method has been applied successfully to laboratory-prepared and commercial samples.

A new gas chromatographic method for determination of amino acid levels in human serum

1980 ◽  
Vol 105 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Hartmut Frank ◽  
Albert Rettenmeier ◽  
Helmut Weicker ◽  
Graeme J. Nicholson ◽  
Ernst Bayer
Keyword(s):  
Amino Acid ◽  
Human Serum ◽  
Chromatographic Method ◽  
Amino Acid Levels ◽  
Gas Chromatographic Method

Qualitative and Quantitative Determination of Methaqualone in Serum by Gas Chromatography

1974 ◽  
Vol 20 (2) ◽  
pp. 249-254 ◽  
Author(s):  
M A Evenson ◽  
G L Lensmeyer
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Chromatographic Method ◽  
Internal Standard ◽  
Serum Concentrations ◽  
Single Extraction ◽  
Qualitative And Quantitative ◽  
Gas Chromatographic Method ◽  
Isothermal Gas

Abstract A rapid, simple, accurate, and precise isothermal gas-chromatographic method is introduced for determination of methaqualone (2-methyl-3-o-tolyl-4(3H)-quinazolinone) in serum. A single extraction of 2 ml of serum, without derivative formation, will give adequate sensitivity for quantitation of therapeutic serum concentrations of the drug within 15 min. The method is free of interferences from biological substances, as well as from commonly used drugs. A non-drug internal standard compensates for variables in extraction, injection, and instrumental changes during analysis. The coefficient of variation, day-to-day, is 5.6%. Mean recovery of added methaqualone was 80%. To compensate for the nonquantitative yield and ensure accurate results, we prepared all analytical methaqualone standards in serum.

Gas Chromatographic Determination of Dioxathion and Chlorfenvinphos in Emulsifiable Formulations and Livestock Dips

1970 ◽  
Vol 53 (3) ◽  
pp. 566-568
Author(s):  
J E Paterson
Keyword(s):  
Quantitative Determination ◽  
Chromatographic Analysis ◽  
Chromatographic Method ◽  
Silicone Oil ◽  
Chromatographic Determination ◽  
Ionization Detector ◽  
Flame Ionization ◽  
Coefficients Of Variation ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of dioxathion and chlorfenvinphos in emulsifiable concentrates and livestock dips. A convenient quantity of the emulsifiable formulation is dissolved in xylene and the aqueous dip is extracted with xylene for gas chromatographic analysis, using a mixed silicone oil stationary phase and a flame ionization detector. The coefficients of variation for the dioxathion and chlorfenvinphos determinations in the emulsifiable concentrate are 2.4 and 1.0%, respectively. Recoveries of the former from a fouled dip ranged from 97 to 103% and recoveries of the latter ranged from 92 to 97%.

A Radio-Gas Chromatographic Method for Determining the Specific Radioactivity of Glycolic Acid in 14C-Labeled Leaf Tissue

1975 ◽  
Vol 53 (5) ◽  
pp. 609-614 ◽  
Author(s):  
J. D. Mahon ◽  
K. Egle ◽  
H. Fock
Keyword(s):  
Quantitative Determination ◽  
Plant Material ◽  
Glycolic Acid ◽  
Chromatographic Method ◽  
Specific Radioactivity ◽  
Leaf Tissue ◽  
Acid Solutions ◽  
Complete Procedure ◽  
Gas Chromatographic Method

A method for the extraction and quantitative determination of both the mass and radioactivity of glycolic acid from 14C-labeled leaf tissue is described. The recoveries of both mass and radioactivity from standard [1-14C]glycolic acid solutions averaged 98%, and recovery of radioactivity added to plant samples as [1-14C]glycolic acid was over 90% after the complete procedure. The method was reliable with total samples containing as little as 130 nmol of glycolic acid.The mass of glycolic acid recovered from sunflower leaf tissue was proportional to the amount of tissue extracted. In experiments with different plant material, the amount of glycolic acid varied between 530 and 1120 nmol/dm2 of leaf tissue. The specific radioactivity of the glycolic acid in sunflower leaf tissue during photosynthesis in 14CO2 was never more than 20% of the specific radioactivity of the 14CO2 supplied.

Sign in / Sign up

Export Citation Format

Share Document