AI Article Synopsis
- The study tested the effectiveness of the QuEChERS method for detecting pesticide residues in two types of apples, spiking samples with varying amounts of four different pesticides.
- While the method showed no significant matrix effect for one pesticide, matrix-matched calibration was needed for others to ensure accurate results.
- Overall, the method demonstrated a recovery rate of 90.15% and met validation parameters like precision and accuracy, confirming its reliability for pesticide analysis.
Article Abstract
This study was undertaken to validate the "quick, easy, cheap, effective, rugged and safe" (QuEChERS) method using Golden Delicious and Starking Delicious apple matrices spiked at 0.1 maximum residue limit (MRL), 1.0 MRL and 10 MRL levels of the four pesticides (chlorpyrifos, dimethoate, indoxacarb and imidacloprid). For the extraction and cleanup, original QuEChERS method was followed, then the samples were subjected to liquid chromatography-triple quadrupole mass spectrometry (LC-MS/MS) for chromatographic analyses. According to t test, matrix effect was not significant for chlorpyrifos in both sample matrices, but it was significant for dimethoate, indoxacarb and imidacloprid in both sample matrices. Thus, matrix-matched calibration (MC) was used to compensate matrix effect and quantifications were carried out by using MC. The overall recovery of the method was 90.15% with a relative standard deviation of 13.27% (n = 330). Estimated method detection limit of analytes blew the MRLs. Some other parameters of the method validation, such as recovery, precision, accuracy and linearity were found to be within the required ranges.
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| http://dx.doi.org/10.1080/03601234.2016.1191922 | DOI Listing |
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