Evaluation of selected analyte protectant to improve performance of gas chromatographic analysis of pesticide residues

Mohammad Shahid Shahrun, . and Ngan Chai Keong, . and Khairatul Azmah Mohamed, . Evaluation of selected analyte protectant to improve performance of gas chromatographic analysis of pesticide residues. pp. 265-270. ISSN 1394-9829

The effectiveness of three analyte protectants namely D-sorbitol 3-ethoxy-1 2- propanediol (ethoxypropanediol) and L-gulonic acid -lactone (gulonolactone) in improving peak shape of analytes for better peak sensitivity and quantitation during GC-MS analysis of pesticide residues were evaluated. The use of these analyte protectants were investigated with three pesticide groups i.e. organochlorine (-HCH and -endosulphan) organophosphate (chlorpyriphosmethyl fenitrothion and prothiophos) and synthetic pyrethroid (bifenthrin fenpropathrin cypermethrin and deltamethrin). The analyte protectants were fortified in mixed pesticide standard at a rate of 1 mg/ml prior to GC-MS analysis. Improvement of analytes was seen as peak was enhanced as much as 41 and better separation obtained with application of analyte protectants. These compounds fill in the active sites in the inlet and column of the GC-MS thus reducing analyte interactions. The ethoxypropanediol seems adequate to provide protection for pesticide during early to mid-eluting process while sorbitol and gulonolactone can be used for mid to late-eluting process. However a combination of all three analyte protectants will provide better protection.

Full text available from: Official URL: http://jtafs.mardi.gov.my/jtafs/40-2/Pesticide%20r...

Abstract

The effectiveness of three analyte protectants namely D-sorbitol 3-ethoxy-1 2- propanediol (ethoxypropanediol) and L-gulonic acid -lactone (gulonolactone) in improving peak shape of analytes for better peak sensitivity and quantitation during GC-MS analysis of pesticide residues were evaluated. The use of these analyte protectants were investigated with three pesticide groups i.e. organochlorine (-HCH and -endosulphan) organophosphate (chlorpyriphosmethyl fenitrothion and prothiophos) and synthetic pyrethroid (bifenthrin fenpropathrin cypermethrin and deltamethrin). The analyte protectants were fortified in mixed pesticide standard at a rate of 1 mg/ml prior to GC-MS analysis. Improvement of analytes was seen as peak was enhanced as much as 41 and better separation obtained with application of analyte protectants. These compounds fill in the active sites in the inlet and column of the GC-MS thus reducing analyte interactions. The ethoxypropanediol seems adequate to provide protection for pesticide during early to mid-eluting process while sorbitol and gulonolactone can be used for mid to late-eluting process. However a combination of all three analyte protectants will provide better protection.

[error in script]

Item Type:	Article
AGROVOC Term:	Pesticide residues
AGROVOC Term:	Gas chromatography
AGROVOC Term:	Gc (gas chromatography)
AGROVOC Term:	Mass spectrometry
AGROVOC Term:	Sorbitol
AGROVOC Term:	Lactones
AGROVOC Term:	Pesticides
AGROVOC Term:	Pyrethroids
AGROVOC Term:	Organochlorine compounds
AGROVOC Term:	Separation
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24500

Actions (login required)

View Item