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Optimization of a One‐Step Method for the Multiresidue Determination of Organophosphorous Pesticides in Camellia Oil
Author(s) -
Liu Yihua,
Shen Danyu,
Mo Runhong,
Tang Fubin
Publication year - 2013
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.12017
Subject(s) - sorbent , chromatography , solid phase extraction , detection limit , chemistry , camellia , pesticide , residue (chemistry) , ethyl acetate , solvent , extraction (chemistry) , sample preparation , pesticide residue , organic chemistry , adsorption , botany , agronomy , biology
Due to the widespread use and potential toxicity of organophosphorous pesticides (OPs), multiresidue monitoring of OPs in camellia oil has become increasingly important. A simple, rapid, and effective matrix solid‐phase dispersion extraction for the determination of 15 organophosphorous pesticides in camellia oil is described. Related important factors influencing the extraction efficiency, such as type of sorbent material, eluting solvent, and ratio of sample/sorbent were studied and optimized. The best results were obtained using 0.5 g of camellia oil, 1.5 g of white carbon black as dispersant sorbent, and 5 mL of acetonitrile: ethyl acetate (2:1, V/V) as eluting solvent. Method validation was performed in order to study sensitivity, linearity, precision, and accuracy. Average recoveries ranged between 76.7% and 102.9% with relative standard deviation values from 2.9% to 13.7% at 2 concentration levels (10 and 100 μ g/kg). The method limit of detection at or below the regulatory maximum residue limits for the pesticides was achieved. Practical Application: A simple, rapid, and effective method for multiresidue determination of organophosphorous pesticides in camellia oil was developed. The sample preparation could finish in 5 min.