| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 496.86 KB | Adobe PDF |
Advisor(s)
Abstract(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.
Description
Keywords
Spectrophotometry Cadmium Lead Metals screening mSI-LOV Biparametric determination Biparametric determination Marine waters
Citation
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
Publisher
Elsevier