Evaluation of pressurized liquid extraction for the analysis of four pesticides in unpolished rice

• Published in: Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Vol. 43; no. 5; pp. 390 - 394
• Main Authors: Otake, T, Aoyagi, Y, Matsuo, M, Itoh, N, Yarita, T
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 01-06-2008; Taylor & Francis
• Subjects: Biological and medical sciences; chemical analysis; Chromatography, Gas; Clinical Laboratory Techniques; enitrothion; etofenprox; extraction; food analysis; food contamination; Food industries; Fruit and vegetable industries; fthalide; Fundamental and applied biological sciences. Psychology; homogenization; isoprothiolane; Mass Spectrometry; Oryza - chemistry; Oryza sativa; pesticide; pesticides; Pesticides - analysis; Pressurized liquid extraction (PLE); Reference Standards; repeatability; Reproducibility of Results; rice; Soil Pollutants - analysis; Solubility; Temperature; unpolished rice; Water - chemistry; unpolished rice; Insecticide; pesticide; Fenitrothion; Pesticides; Pyrethroids; Method; Etofenprox; homogenization; Organophosphorus compounds; Extraction; Pressurized liquid extraction (PLE); Rice
• ISSN: 0360-1234; 1532-4109
• DOI: 10.1080/03601230802062109

The aim of to evaluate efficiency of this study was extraction pressurized liquid extraction (PLE) for the analysis of four pesticides, fthalide, etofenprox, fenitrothion, and isoprothiolane, in unpolished rice by comparing with homogenization as a reference technique. The concentrations of four selected pesticides obtained by PLE with acetonitrile at 130°C for 10 min × 2 cycles were comparable to those by homogenization with water-soaking. The repeatability of the analysis, represented as relative standard deviations (RSDs), were 1.4-3.6% (n = 3) for PLE at 130°C and 1.2-3.8% (n = 3) for homogenization with water-soaking. Recovery yields of surrogates were 75-88% and 87-109% for PLE at 130°C and homogenization with water-soaking, respectively, and these were satisfactory according to the method of positive list. This study suggested that PLE can be applied for the analysis of selected four pesticides in unpolished rice as well as homogenization with water-soaking.