Method validation and simultaneous quantification of eight organochlorines/organophosphates in apple by gas chromatography

Dar

Biomedical Chromatography

et al. 2022

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The present work describes the persistence, dissipation behaviour, half‐life, risk assessment and novel gas chromatography method for the residue estimation of cypermethrin in green pea by spraying cypermethrin 10EC at 50 g a.i. ha−1 at fruiting stage followed by another application at a 10 day interval. The sample extraction and cleanup was followed bya modified quick, easy, cheap, effective, rugged, and safe method, and the residues of cypermethrin were determined using a validated gas chromatography method. The initial deposits were found to be 1.21 mg kg−1 following the application of insecticide at 50 g a.i. ha−1. Cypermethrin residues declined to below the detection limit of 0.05 mg kg−1 after 15 days at the recommended dosage. The half‐life of cypermethrin was 2.66 days at 50 g a.i. ha−1. For risk assessment studies, the waiting period of 15 days is recommended as safe for consumption for the insecticide. The GC‐ECD method was validated according to the SANTE guidelines by various analytical parameters including linearity, accuracy, detection and quantification limits. The developed method is simple, selective and repeatable, and can be used for the standardization of pesticides on fruits and vegetables.

Section: Resultsmentioning

confidence: 75%

Risk assessment, development and validation of a GC‐ECD‐based method for the quantification of cypermethrin from green pea

Dar

Biomedical Chromatography

et al. 2022

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“…Recoveries of profenofos on both fruits were in the range of 76–110%, indicating high accuracy of the developed method. The recovery (%) was calculated using Equation (1) (Dar et al, 2015; Wani et al, 2019b):

Recovery (() %) goodbreak= ((), found amount goodbreak- original amount) / spiked amount goodbreak\times 100

…”

Section: Resultsmentioning

confidence: 99%

“…Gas chromatography (GC) appears to be a suitable choice for the identification, separation and quantification of profenofos. In continuation of our previous studies (Ahmad Dar et al, 2020;Dangroo et al, 2016;Dangroo et al, 2014;Dar et al, 2014;Dar et al, 2015;Dar et al, 2016;Dar et al, 2018;Dar et al, 2019;Fayaz et al, 2018;Jan et al, 2018;Khan et al, 2013;Khan et al, 2012;Singh et al, 2018;Wani et al, 2019a) on the application of chromatography for fingerprinting and chromatographic method development to assure quality control of vegetables/fruits/ medicinal plants, herein we report a validated analytical method for the quantification of profenofos from green pea and cucumber, as well as risk assessment and evaluation of dissipation behaviour, persistence and half-life.…”

mentioning

confidence: 77%

Dissipation and gas chromatographic method for the determination of profenofos residues in/on green pea and cucumber

Dar

Biomedical Chromatography

et al. 2022

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Herein we report a novel, accurate and cost-effective gas chromatography method for the determination of average deposits of profenofos on green pea and cucumber following good agricultural practices. Additionally the risk assessment, dissipation and waiting period for profenofos were determined. The average initial deposits (2 h after spraying) of profenofos in/on green pea and cucumber were 3.41 and 3.62 mg kg À1 respectively following two applications at a 10 day interval of profenofos 50EC formulation. Profenofos residues on both

“…The analytical method was validated for analysis of ethion on cucumber according to the SANCO guidelines. The method was validated based on parameters such as Recovery studies, linearity, LOD, LOQ, Specificity, and Ruggedness (Table ) .…”

Section: Resultsmentioning

confidence: 99%

Persistence, dissipation kinetics, and waiting period of ethion on cucumber by gas chromatography‐electron capture detector

Separation Science Plus

Mukhtar

et al. 2019

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This study investigated the persistence, half life, dissipation kinetics, and waiting period of ethion on cucumber by gas chromatography‐electron capture detector. The residue analysis of ethion on cucumber was carried out by spraying ethion 50EC 500 g a.i. ha−1 at fruit developing stage followed by another application at 10‐day interval and residue were estimated by validated a method on gas chromatography. The sample extraction and clean up was done by modified quick, easy, cheap, effective, rugged, and safe method. The average initial deposits of ethion on cucumber fruit were found to be 0.92 mg/kg, by following two applications at 10‐day interval of ethion 50EC at 500 g a.i. ha−1. Residues of ethion reached below limit of detection 0.05 mg/kg after 15 days at recommended dosage. Therefore a waiting period of 15 day is suggested to reduce the risk before consumption of cucumber fruit samples after following Good Agricultural Practices. These results would be helpful for safe use of ethion on cucumber and to prevent any health problem to consumers. Since the developed method is simple, sensitive, selective and repeatable, it can be extended for ethion based standardisation of herbal formulations containing cucumber and its use in pesticide industries.