Multiresidue analysis of pesticides in three Indian soils: method development and validation using gas chromatography tandem mass spectrometry. 2023

Arijita Bhattacharyya, and Anita Pardeshi, and Apurva Nerpagar, and Kaushik Banerjee
National Reference Laboratory, ICAR-National Research Centre for Grapes, P.O. Manjri Farm, Pune, India.

The paper reports a multiresidue method that was validated on 220 multi-class pesticides in three major Indian soils, namely, (i) new alluvial soil (NAS); (ii) red lateritic soil (RS) and (iii) black soil (BS) from three different regions. An ethyl acetate-based extraction method with a freezing-out cleanup step was employed for sample preparation, followed by gas chromatography-tandem mass spectrometric analysis. The method that was initially optimized on BS worked satisfactorily for the other two soil matrices. At the spiking level of 10 µg/kg (LOQ), the recoveries were satisfactory (within 70-120%) with precision-RSDs, ≤20% (n = 6) for 85, 88.6, and 89% of compounds in BS, RS, and NAS respectively. At 20 µg/kg, the method performance was satisfactory in each soil for all pesticides. When this validated method was applied to analyse 25 field samples, 6 pesticides were detected in them. In each case, precision (RSD) was <20%. The method sensitivity, accuracy and precision complied with the SANTE/2020/12830 guidelines. The method can be applied for environmental monitoring and risk assessment purposes, thus aiding in regulating pesticide usage in agricultural fields. The limitations and future scope of the study are also discussed.HighlightsA multiresidue method is reported for simultaneous analysis of multi-class pesticides in diverse soilsThe method was validated on 220 pesticides in new alluvial, red lateritic and black soilsSample preparation involved extraction with ethyl acetate and cleanup by a freezing stepThe residues were estimated by gas chromatography tandem mass spectrometry (GC-MS/MS)The method accuracy and precision complied with the EU's SANTE guidelines.

UI MeSH Term Description Entries
D008401 Gas Chromatography-Mass Spectrometry A microanalytical technique combining mass spectrometry and gas chromatography for the qualitative as well as quantitative determinations of compounds. Chromatography, Gas-Liquid-Mass Spectrometry,Chromatography, Gas-Mass Spectrometry,GCMS,Spectrometry, Mass-Gas Chromatography,Spectrum Analysis, Mass-Gas Chromatography,Gas-Liquid Chromatography-Mass Spectrometry,Mass Spectrometry-Gas Chromatography,Chromatography, Gas Liquid Mass Spectrometry,Chromatography, Gas Mass Spectrometry,Chromatography, Mass Spectrometry-Gas,Chromatography-Mass Spectrometry, Gas,Chromatography-Mass Spectrometry, Gas-Liquid,Gas Chromatography Mass Spectrometry,Gas Liquid Chromatography Mass Spectrometry,Mass Spectrometry Gas Chromatography,Spectrometries, Mass-Gas Chromatography,Spectrometry, Gas Chromatography-Mass,Spectrometry, Gas-Liquid Chromatography-Mass,Spectrometry, Mass Gas Chromatography,Spectrometry-Gas Chromatography, Mass,Spectrum Analysis, Mass Gas Chromatography
D010573 Pesticide Residues Pesticides or their breakdown products remaining in the environment following their normal use or accidental contamination. Pesticide Residue,Residue, Pesticide,Residues, Pesticide
D010575 Pesticides Chemicals used to destroy pests of any sort. The concept includes fungicides (FUNGICIDES, INDUSTRIAL); INSECTICIDES; RODENTICIDES; etc. Pesticide
D012987 Soil The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants. Peat,Humus,Soils
D052616 Solid Phase Extraction An extraction method that separates analytes using a solid phase and a liquid phase. It is used for preparative sample cleanup before analysis by CHROMATOGRAPHY and other analytical methods. Extraction, Solid Phase,Extractions, Solid Phase,Solid Phase Extractions
D053719 Tandem Mass Spectrometry A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection. Mass Spectrometry-Mass Spectrometry,Mass Spectrometry Mass Spectrometry,Mass Spectrometry, Tandem

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