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Elucidation of False Detection of Pesticides During Residue Analysis in Indian Tobacco by Multidimensional GC-MS

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Title Elucidation of False Detection of Pesticides During Residue Analysis in Indian Tobacco by Multidimensional GC-MS
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Creator Ghosh R.K, Khan, Z, Banerjee Kaushik, Reddy D., Nalli J., Ray D.P.
 
Subject False detection in pesticide residue analysis
Tobacco
Multidimensional GC-MS
 
Description Not Available
Background: False detection of pesticides in agricultural produce may raise serious questions regarding both consumer safety and trade. High levels of delta-hexachlorocyclohexane (δ-HCH; 11.7–22.3 mg/kg) were detected in some tobacco samples in a retention time–based GC analysis. Hence, the selection of an appropriate analytical method is an uncompromisable necessity. Objectives: This research work aimed to elucidate false detection of pesticides along with identification of coeluting tobacco matrix compounds to understand the dynamics of false detection with an increase in the number of analyzed pesticides and to screen suitable analytical methods. Methods: Initially, retention time–based GC analysis was performed for monitoring of 10 pesticide residues in tobacco leaf matrix, followed by GC-MS/selected-ion monitoring (SIM) analysis. Then, the total number of pesticides to be analyzed was increased to 47, and residue analysis was performed by involving GC-MS/SIM and multidimensional (MD) GC-MS. Results: A false-positive detection of δ-HCH due to a coeluting tobacco aroma compound, neophytadiene, during residue analysis of 10 pesticides in tobacco (Nicotiana tabacum L.) leaf was observed. This problem was resolved by employing the unique quantifier and qualifier ions in SIM mode. However, with 47 pesticides, neophytadiene completely masked the signal of δ-HCH, which resulted in an impure spectrum of δ-HCH (
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Date 2020-07-31T06:18:24Z
2020-07-31T06:18:24Z
2020-01-29
 
Type Journal
 
Identifier Ghosh R.K, Khan, Z, Banerjee Kaushik, Reddy D., Nalli J., Ray D.P. (2019). Elucidation of False Detection of Pesticides During Residue Analysis in Indian Tobacco by Multidimensional GC-MS. Journal of AOAC International 103-(1): 55-61
https://academic.oup.com/jaoac/article-abstract/103/1/55/5717524?redirectedFrom=fulltext
http://krishi.icar.gov.in/jspui/handle/123456789/38641
 
Language English
 
Relation Not Available;
 
Publisher Oxford University Press