TALANTA | 卷:143 |
Screening of cadmium and lead in potentially contaminated waters using a spectrophotometric sequential injection lab-on-valve methodology | |
Article | |
Santos, Ines C.1  Mesquita, Raquel B. R.1,2,3  Rangel, Antonio O. S. S.1  | |
[1] Univ Catolica Portuguesa Porto, Escola Super Biotecnol, Lab Associado, CBQF, P-4202401 Porto, Portugal | |
[2] Univ Porto, Inst Biomed Sci Abel Salazar ICBAS, Lab Hydrobiol, P-4050313 Porto, Portugal | |
[3] Univ Porto, Inst Marine Res CIIMAR, P-4050313 Porto, Portugal | |
关键词: Spectrophotometry; Cadmium; Lead; Metals screening; mu SI-LOV; Biparametric determination; Marine waters; | |
DOI : 10.1016/j.talanta.2015.05.005 | |
来源: Elsevier | |
【 摘 要 】
The present work describes the development of a mu SI-LOV method for the simultaneous screening of cadmium and lead in potentially contaminated water samples. To attain the biparametric determination, dithizone was chosen as the spectrophotometric reagent as it forms a colored complex with both metal ions, at different pH conditions. The cadmium determination was attained in strong alkaline conditions (pH approximate to 12); the lead determination was calculated by the difference with the determination of both metals in mild alkaline conditions (pH approximate to 8). The colored complex was measured at 550 nm and the method presented a LOD of 34 mu g L-1 for cadmium and 56 mu g L-1 for lead, with a sample consumption of 20 mu L per assay and a determination rate of 55 h(-1). The results obtained were in agreement with those obtained by FAAS. The developed method was efficiently applied to the screening of cadmium and lead in marine port waters. (C) 2015 Elsevier B.V. All rights reserved.
【 授权许可】
Free
【 预 览 】
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