期刊
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
卷 98, 期 4, 页码 546-555出版社
SPRINGER
DOI: 10.1007/s00128-016-2010-5
关键词
Air-assisted dispersive liquid-liquid microextraction; UV-Vis spectrophotometry; Chemometrics; Validation study; Lead; Aqueous samples
In this study, AA-DLLME combined with UV-Vis spectrophotometry was developed for pre-concentration, microextraction and determination of lead in aqueous samples. Optimization of the independent variables was carried out according to chemometric methods in three steps. According to the screening and optimization study, 86 mu L of 1-undecanol (extracting solvent), 12 times syringe pumps, pH 2.0, 0.00% of salt and 0.1% DDTP (chelating agent) were chosen as the optimum independent variables for microextraction and determination of lead. Under the optimized conditions, R = 0.9994, and linearity range was 0.01-100 A mu g mL(-1). LOD and LOQ were 3.4 and 11.6 ng mL(-1), respectively. The method was applied for analysis of real water samples, such as tap, mineral, river and waste water.
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