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Trace analysis of some organophosphorus pesticides in rice samples using ultrasound‐assisted dispersive liquid–liquid microextraction and high‐performance liquid chromatography
Author(s) -
Sharafi Kiomars,
Fattahi Nazir,
Mahvi Amir Hossein,
Pirsaheb Meghdad,
Azizzadeh Nahid,
Noori Masomeh
Publication year - 2015
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201401209
Subject(s) - chromatography , detection limit , extraction (chemistry) , chemistry , high performance liquid chromatography , pesticide , sample preparation , gas chromatography , trace amounts , calibration curve , linear range , liquid liquid , analytical chemistry (journal) , medicine , alternative medicine , pathology , agronomy , biology
An ultrasound‐assisted dispersive liquid–liquid microextraction based on solidification of a floating organic drop method followed by high‐performance liquid chromatography was developed for the extraction, preconcentration, and determination of trace amounts of organophosphorus pesticides in rice samples. Variables affecting the performance of both steps were thoroughly investigated. Some effective parameters on extraction were studied and optimized. Under the optimum conditions, recoveries for rice sample are in the range of 58.0–66.0%. The calibration graphs are linear in the range of 4–800 μg/kg and, limits of detection and limits of quantification are in the range of 1.5–3 and 4.2–8.5 μg/kg, respectively. The relative standard deviation for 50.0 μg/kg of organophosphorus pesticides in rice sample are in the range of 4.4–5.1% ( n = 5). The obtained results show that proposed method is a fast and simple method for the determination of pesticides in cereals.