scholarly journals Multi Residue Method for Determination of Pesticides Using Luke Method Extraction, Gel Permeation Chromatography and Gas Chromatography

1995 ◽  
Vol 20 (2) ◽  
pp. 109-118 ◽  
Author(s):  
Isao SAITO ◽  
Sadaji YAMADA ◽  
Harumi OSHIMA ◽  
Junko HAYAKAWA
Keyword(s):  
Gas Chromatography ◽  
Gel Permeation Chromatography ◽  
Gel Permeation

scholarly journals Cleanup Procedure for Monitoring Chlorinated Compounds in Animal Feed and Crops

1998 ◽  
Vol 81 (3) ◽  
pp. 513-518 ◽  
Author(s):  
Mona Syhre ◽  
Gudrun Hanschmann ◽  
Ralf Heber
Keyword(s):  
Gas Chromatography ◽  
Silica Gel ◽  
Carbon Material ◽  
Animal Feed ◽  
Gel Permeation Chromatography ◽  
Electron Capture Detection ◽  
Chlorinated Pesticides ◽  
Gel Permeation ◽  
Cleanup Procedure

abstract A powerful cleanup procedure for determination of chlorinated pesticides and poly chlorinated biphenyls (PCBs) in difficult agricultural matrixes like feeds or crops was developed to eliminate the interferences in chromatograms obtained by gas chromatography with electron capture detection. The adsorption material used was ENVI-Carb, a graphitized nonporous carbon material. This procedure proved to be more reliable than the established cleanup procedure, which uses gel permeation chromatography and silica gel cartridges. Because ENVI-Carb cleanup delivers clear, colorless eluates with no interferences, chlorinated pesticides and PCBs may be detected at levels as low as 0.0004 mg/kg for monitoring purposes. Accuracy was validated through a series of recovery experiments.

scholarly journals Determination of Organotins in Aquatic Food by Gas Chromatography with Pulsed Flame Photometric Detection

2008 ◽  
Vol 91 (3) ◽  
pp. 653-659 ◽  
Author(s):  
Zhao Yun-Feng ◽  
Zhao Kong-Xiang ◽  
Wu Yong-Ning
Keyword(s):  
Gas Chromatography ◽  
Standard Deviation ◽  
Gel Permeation Chromatography ◽  
Photometric Detection ◽  
Relative Standard ◽  
Gel Permeation ◽  
Flame Photometric Detection ◽  
Aquatic Food ◽  
Derivative Products

Abstract A method based on gas chromatography (GC)-pulsed flame photometric detection (PFPD) was developed to determine the levels of organotins in aquatic food. After being purified by gel-permeation chromatography in ethyl actatetetrahydrofuran, the organotin compounds were derivatized by pentylmagnesium bromide. The derivative products were injected into the GC system and detected by PFPD (sulfur mode). The method was validated by analysis of the certified reference material and spiked samples. Recoveries of organotins ranged from 84.1 to 116.6 with relative standard deviation between 1.3 and 16.0 when spiked at levels of 2, 10, and 40 g/kg. The limits of detection varied from 0.1 to 1.2 g/kg for shellfish and 0.1 to 0.5 g/kg for fish. The proposed method was suitable for determining organotins in aquatic foods.

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