Determination of pesticide residues in peaches by using gas chromatography and mass spectrometric detection. Issue 14 (14th November 2019)

• Record Type: Journal Article
• Authors: Samad, Abdul; Akhtar, Shazia; Shahid, Muhammad Munir; Ahad, Karam
• Is Part Of: International journal of environmental analytical chemistry. Volume 99:Issue 14(2019)
• Page Start: 1446
• Page End: 1458
• Publication Date: 2019-11-14
• Subjects: Pesticides -- residues -- solid-phase extraction -- peach -- validation -- GC-MSD -- MRLs; Ecology -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental chemistry -- Periodicals; Pollution -- Periodicals; 577.14
• DOI: 10.1080/03067319.2019.1622699
• Languages: English
• ISSNs: 0306-7319

Abstract

ABSTRACT: A multi-residue method using selected ion monitoring mode GC-MSD has been developed for the quantitative analysis of 30 widely used pesticides in fresh peaches produced in Swat Malakand, Pakistan. The planned methodology involved a sample extraction procedure using liquid-liquid partition with acetonitrile followed by a clean-up step based on solid-phase extraction (SPE). Method validation was performed in accordance with European Union guidelines. The European Union criteria (recovery 70–120%, RSD <20%) were met for majority of pesticides. For most of the pesticides, signal-to-noise ratios were good and background-corrected mass spectra often contained sufficient diagnostic to enable identity and confirmation. The limits of quantification (LOQs) were in the range 0.01–1.0 mg/kg. The above method was successfully applied to the analysis of peach samples (n = 30) from the field. Pesticide concentration in real peach samples was compared with the maximum residue levels (MRLs). Pesticide residues were detected in 73% of the peach samples. Most frequent residues were metalaxyl, α-cypermethrin, azoxystrobin, dimethoate, tebuconazol, λ-cyhalothrin and spiromesifin in peach samples.