Comparison of Electron Capture and Hydrogen Flame Detectors for the Gas Chromatographic Determination of Trace Amounts of Metal Chelates.

1964 ◽  
Vol 36 (10) ◽  
pp. 2034-2035 ◽  
Author(s):  
D. K. Albert
Keyword(s):  
Electron Capture ◽  
Chromatographic Determination ◽  
Metal Chelates ◽  
Hydrogen Flame

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.

Electron-capture gas chromatographic determination of nitrite as the pentafluorobenzyl derivative

1984 ◽  
Vol 291 ◽  
pp. 409-415 ◽  
Author(s):  
Hsin-lung Wu ◽  
Su-Hwei Chen ◽  
Koichi Funazo ◽  
Minoru Tanaka ◽  
Toshiyuki Shono
Keyword(s):  
Electron Capture ◽  
Chromatographic Determination

Electron-Capture Gas Chromatographic Determination of Alkyl Thiophosphates as Pentafluorobenzyl Derivatives

1995 ◽  
Vol 28 (9) ◽  
pp. 1693-1710 ◽  
Author(s):  
S. J. Lin ◽  
H. L. Wu ◽  
Y. H. Wen ◽  
S. H. Chen
Keyword(s):  
Electron Capture ◽  
Chromatographic Determination

scholarly journals Gas Chromatographic Determination of Chlorothalonil in Leaves and Roots of Scrophularia and in Soil

1996 ◽  
Vol 79 (2) ◽  
pp. 587-588 ◽  
Author(s):  
Lan Zhao ◽  
De-Fang Fan
Keyword(s):  
Electron Capture ◽  
Chromatographic Method ◽  
Detection Limits ◽  
Chromatographic Determination ◽  
Soil Samples ◽  
Florisil Column ◽  
Glass Column ◽  
Leaves And Roots ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for determination of chlorothalonil residues in leaves and roots of Scrophularia and in soil. Samples were extracted with acetone and cleaned up on a Florisil column. Chlorothalonil residues are chromatographed directly on a glass column of 1.5% OV-17 and 2% QF-1 coated on 80-100 mesh Chromosorb W (HP) support and measured with a 63Ni electron capture detector. Detection limits are 0.001 ppm for leaf, 0.005 ppm for root, and 0.001 ppm for soil.

Gas Chromatographic Determination of Captan, Folpet, and Captafol Residues in Tomatoes, Cucumbers, and Apples Using a Wide-Bore Capillary Column: Interlaboratory Study

1991 ◽  
Vol 74 (5) ◽  
pp. 830-835 ◽  
Author(s):  
Dalia M Gilvydis ◽  
Stephen M Walters
Keyword(s):  
Gas Chromatography ◽  
Electron Capture ◽  
Capillary Column ◽  
Chromatographic Determination ◽  
Interlaboratory Study ◽  
Electron Capture Detection ◽  
Coefficients Of Variation ◽  
Capillary Column Gas Chromatography ◽  
Ppm Level

Abstract An interlaboratory study of the determination of captan, folpet, and captafol in tomatoes, cucumbers, and apples was conducted by 4 laboratories using wide-bore capillary column gas chromatography with electron capture detection. The 3 fungicides were determined using the Luke et al. multlresidue method modified to Include additional solvent elutlon in the optional Florisll column cleanup step used with this method. The crops were fortified with each fungicide at 3 levels per crop. Mean recoveries ranged from 86.2% for a 25.1 ppm level of captan in apples to 115.4% for a 0.288 ppm level of captafol In apples. Interlaboratory coefficients of variation ranged from 3.4% (24.7 ppm folpet) to 9.7% (0.243 ppm captafol) for tomatoes; from 2.8% (2.0 ppm captafol) to 8.2% (24.8 ppm captan) for cucumbers; and from 1.5% (0.234 ppm folpet) to 22.1% (0.266 ppm captafol) for apples.

Modified Method for Electron Capture Gas-Liquid Chromatographic Determination of Diethylstilbestrol Residues in Urine of Fattened Bulls

1983 ◽  
Vol 66 (5) ◽  
pp. 1230-1233
Author(s):  
Athanasios E Tirpenou ◽  
Stylianos D Kilikidis ◽  
Athanasios P Kamarianos
Keyword(s):  
Sodium Hydroxide ◽  
Electron Capture ◽  
Silica Gel ◽  
Chromatographic Determination ◽  
Trifluoroacetic Anhydride ◽  
Phenolic Fraction ◽  
Modified Method ◽  
Liquid Chromatographic Determination ◽  
Liquid Chromatographic

Abstract A gas-liquid chromatographic (GLC) method with electron capture (EC) detection was developed fof determining diethylstilbestrol residues in the urine of fattened bulls. Diethylstilbestrol (DES) is extracted into benzene, and then into IN sodium hydroxide. The pH of the phenolic fraction (alkaline phase) is adjusted to 10.2 and DES is extracted again into benzene. Sample extracts are cleaned up on silica gel. Trifluoroacetic anhydride (TFAA) is used as acylation reagent, and the derivatized sample is chromatographed on a 3% OV-17 column and measured with a 63Ni EC detector. The method is suitable for determining residues at levels as low as 2 ppb.

Sign in / Sign up

Export Citation Format

Share Document