Determination of sub-ng ml levels of mercury in water by electrolytic deposition and electrothermal atomic-absorption spectrophotometry.
The determination of trace mercury in water samples by electrolytic deposition and electrothermal atomic-absorption spectrophotometry is described. Traces of mercury in water are preconcentrated by electrolytic reduction and deposition on a platinum wire cathode, which is then put into a graphite cup for direct atomization and measurement. The method is sensitive and simple, with a detection limit of 0.04 ng/ml. Almost all the metal ions commonly found in water samples can be tolerated, because of the selective deposition at controlled potential.
Xu
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BX
Department of Chemistry, East China Normal University, 3663 Chung Shan Road (N), Shanghai, People's Republic of China.
Xu
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TM
Shen
M N
MN
Fang
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YZ