DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY

L&#220; RONGHUI; CHEN WEIFEN

Volume 3 Issue 2

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Article Navigation > Acta Oceanologica Sinica > 1984 > (2): 221-225

LÜ RONGHUI, CHEN WEIFEN. DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (2): 221-225.

Citation:

LÜ RONGHUI, CHEN WEIFEN. DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (2): 221-225.

LÜ RONGHUI, CHEN WEIFEN. DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (2): 221-225.

Citation:

LÜ RONGHUI, CHEN WEIFEN. DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY[J]. Acta Oceanologica Sinica, 1984, (2): 221-225.

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DIRECT DETERMINATION OP TRACE CADMIUM IN SEAWATER BY DERIVATIVE-VOLTAMMETRY

Third Institute of Oceanography, National Bureau of Oceanography, Xiamen

Received Date: 1982-07-15
Rev Recd Date: 1983-08-29

Abstract

Abstract

An analytical method is proposed for the direct determination of Cd in seawater by differential pulse anodic stripping voltammetry and the derivative technique with a hanging mercury drop electrode. The process of determination is quick, simple and convenient. The concentration of Cd in seawater is only determined by adjusting the acidity of seawater to pH 2 and by taking three minutes' plating time. Sensitivity of the method is about 1×10^-10M, and accuracy of that satisfactory. Relative standard deviation is about 12% when the concentration of Cd in seawater is approximately 0.04 ppb. A good agreement was obtained by a standard curve and a standard addition technique respectively from determining Cd in the same seawater. Actual measurement time per sample is about 10 min.