The disappearance rate and risk assessment of thiacloprid residues in Asian pear using liquid chromatography confirmed with tandem mass spectrometry

This study was undertaken to quantify the residue levels and propose the dissipation kinetics of thiacloprid formulated as suspension concentrate in field‐incurred Asian pears grown under two different open‐field conditions. Samples were extracted with 20% distilled water in acetonitrile; partitione...

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Bibliographic Details
Published in:Biomedical chromatography 2017-05, Vol.31 (5), p.np-n/a
Main Authors: Kabir, Md. Humayun, Abd El‐Aty, A.M., Rahman, Md. Musfiqur, Kim, Sung‐Woo, Choi, Jeong‐Heui, Lee, Young‐Jun, Truong, Lieu T.B., Lee, Kang‐Bong, Kim, Mi‐Ra, Shin, Ho‐Chul, Shim, Jae‐Han
Format: Article
Language:English
Subjects:
Asian pear
Calibration
Chromatography, Liquid - methods
dissipation kinetic
Food Analysis - methods
Food Contamination - analysis
Kinetics
LC‐UVD
Limit of Detection
Neonicotinoids
Pesticide Residues - analysis
PHRL
Pyridines - analysis
Pyrus - chemistry
Risk Assessment
Sensitivity and Specificity
Tandem Mass Spectrometry - methods
thiacloprid
Thiazines - analysis
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Summary:This study was undertaken to quantify the residue levels and propose the dissipation kinetics of thiacloprid formulated as suspension concentrate in field‐incurred Asian pears grown under two different open‐field conditions. Samples were extracted with 20% distilled water in acetonitrile; partitioned with brine water and dichloromethane; and purified with a Florisil solid phase extraction cartridge. The analyte was identified with an LC ultraviolet detector, and field‐incurred samples were confirmed using LC–MS/MS. The calibration curve was linear over the range 0.05–5.0 mg/L with a satisfactory coefficient of determination (R2 = 0.9994). The limits of detection and limits of quantification (LOQ) were 0.003 and 0.01 mg/kg, respectively. The recovery rate fortified to blank samples at LOQ, 10× LOQ, and the maximum residue limit (MRL) were between 73.7 and 86.2% with relative standard deviation ≤9.0%. The residual concentrations at both sites were considerably lower than the MRL (0.7 mg/kg) set by the Korean Ministry of Food Drug Safety, with biological half‐lives of 5.0 and 7.4 days, for sites 1 and 2, respectively. From the pre‐harvest residue limit curve, it was predicted that if the residues were
ISSN:0269-3879
1099-0801
DOI:10.1002/bmc.3861