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Orientador(es)
Resumo(s)
The present work describes the development of a µSI-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≈12); the lead determination was calculated by the difference with the determination of both metals in mild alkaline conditions (pH≈8). The colored complex was measured at 550 nm and the method presented a LOD of 34 μg L−1 for cadmium and 56 μg L−1 for lead, with a sample consumption of 20 µL 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.
Descrição
Palavras-chave
Spectrophotometry Cadmium Lead Metals screening mSI-LOV Biparametric determination Biparametric determination Marine waters
Contexto Educativo
Citação
SANTOS, Inês C.: MESQUITA, Raquel; RANGEL, António O. S. S. - Screening of cadmium and lead in potentially contaminated waters using a spectrophotometric sequential injection lab-on-valve methodology. Talanta. ISSN 0039-9140. N.º 143 (2015), p. 359–365
Editora
Elsevier