【摘 要】
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In this paper, the polarographic catalytic wave of trace chromium in seawater and its mechanism are studied. In supporting electrolyte containing ethylene diam
【机 构】
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Department of Chemistry, Xiamen University, Xiamenrrrrrrrrn,Department of Chemistry, Xiamen
【出 处】
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Acta Oceanologica Sinica
论文部分内容阅读
In this paper, the polarographic catalytic wave of trace chromium in seawater and its mechanism are studied. In supporting electrolyte containing ethylene diamine-NaNO2-EDTA, a clear, sensitive and stable catalytic wave is obtained, and its largest peak potential in differential oscilloscopic pola-rogram is -1.7 V (S.C.E). The detection limit for Cr is 1.5 × 10-9 M. It is unnecessary for natural seawater samples to be separated and preconcentrated, and the samples can be directly detected. Variable coefficient is 5%, and the relative error of recovery efficiency, 10%. The wave is a kind of hydrogen catalytic one with absorbability.
In this paper, the polarographic catalytic wave of trace chromium in seawater and its mechanism are studied. In supporting electrolyte containing ethylene diamine-NaNO2-EDTA, a clear, sensitive and stable catalytic wave is obtained, and its largest peak potential in differential oscilloscopic pola The detection limit for Cr is 1.5 × 10 -9 M. It is unnecessary for natural seawater samples to be separated and preconcentrated, and the samples can be directly detected. Variable coefficient is 5% and the relative error of recovery efficiency, 10%. The wave is a kind of hydrogen catalytic one with absorbability.
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