The determination of dissolved manganese and cadmium in sea water at low nmol 1−1 concentrations by chelation and extraction followed by electrothermal atomic absorption spectrometry
✍ Scribed by Peter J. Statham
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 773 KB
- Volume
- 169
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
The development and application of a method suitable for the determination of dissolved manganese and cadmium in sea water at the low concentrations typical of the open ocean is described. A mixed dithiocarbamate/Freon TF extraction system is used to separate trace metals from major constituents, prior to back-extraction into a final dilute nitric acid solution and subsequent determination of the metals by graphite-furnace atomic absorption spectrometry. The procedure also separates dissolved Co, Cu, Fe, Ni, Pb and Zn from a sea-water matrix. A mechanized system for the extraction step and measures to control contamination are described. The detection limits (3 e) for manganese and cadmium are 0.10 and 0.04 nmol l-l, respectively.