期刊
MICROCHEMICAL JOURNAL
卷 90, 期 1, 页码 50-55出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.microc.2008.03.007
关键词
acid-induced cloud-point extraction; spectrophotometry; 2-naphthylamine-1-sulfonic acid; carbaryl; waters; vegetables
资金
- Postgraduate Education and Research Program in Chemistry (PERCH-CIC)
- Thailand Research Fund
- [PHD/0083/2549]
A simple and rapid spectrophotometry for the determination of carbaryl based on acid-induced anionic surfactant micelle-mediated extraction (acid-induced cloud-point extraction) coupled to derivatization with 2-naphthylamine-1-sulfonic acid (ANSA) reagent has been demonstrated. Sodium dodecyl sulfate (SDS) and concentrated HCl were used as extractants at room temperature. ANSA derivatization was directly reacted with carbaryl without alkali hydrolysis. The optimum conditions for both acid-induced extraction and derivatization were investigated. The proposed method shows good analytical features with low detection limit (50 mu g L(-1)) as well as linearity covered a wide range up to 7.0 mg L(-1), good precision with the relative standard deviation of 2.3% (n = 10), and high recoveries in the samples (>85%). The high risks of carbaryl contamination in the local vegetable samples studied were observed with the level of 2.2 g kg(-1). The results of the proposed method were comparable to those obtained from HPLC (t-test. P=0.05). (C) 2008 Elsevier B.V. All rights reserved.
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