Multiresidue Analysis of Organochlorines, Synthetic Pyrethroids and Organophosphorous Pesticides in Pulse Grain Samples
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Author:C. Selvi, M. Paramasivsam, Deepa S Rajathi and S. Chandrasekaran
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:99, Issue:oct-dec
DOI: https://doi.org/10.29321/MAJ.10.100209
Abstract
A multiresidue method was developed and validated for simultaneous determination of 11
organochlorines, 8 synthetic pyrethroids and 14 organophosphorous pesticides in green
gram and black gram grain samples using gas chromatography - electron capture detector
and flame thermoionic detector (GC-ECD/FTD). The QuEChERS principle based methodology
was adopted for extraction. Samples were extracted with acetonitrile and the co-extractives
were removed using dispersive solid-phase extraction (dispersive-SPE) with primary
secondary amine (PSA) after salting out with NaCl and MgSO 4 . Average recoveries for all the
pesticides studied were between 71.70 and 113.31 % and relative standard deviation (RSD)
ranged between 0.10 and 12.79 %. The present study indicates that the proposed method is
useful in monitoring Organic Chlorine, Synthetic Pyrethroids and Organo Phosphorus
insecticides in selected pulse grains.
Key words : Green gram, black gram, multiresidue analysis, QuEChERS