Journal
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
Volume 22, Issue 1, Pages 21-24Publisher
HIGHER EDUCATION PRESS
DOI: 10.1016/S1005-9040(06)60037-8
Keywords
chemiluminescence; flow injection; solid phase extraction; methamidaphos
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The determination of the methamidaphos pesticide residue on vegetables with a simple solid phase extract(SPE) flow injection(FI)-chemiluminescence(CL) method is described. The method is based on the enhancing effect of methamidaphos on the CL reaction of luminol with hydrogen peroxide in an alkaline solution. Under the optimal conditions, the CL intensity is linear to the methamidaphos mass concentration in a range of 0.2-13 mu g/mL (r = 0. 9992). The detection limit(3 sigma,) is 0.047 mu g/ml,. The relative standard deviations for the analysis of three samples are 1.8%, 2.5% and 3.7% (n = 5), respectively. The recovery is in a range of 90%-109% by the method. In this work, this method was successfully applied to the determination of the methamidaphos residue on some vegetable samples.
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