| 示差脉冲吸附伏安法测定海水浪量Cr(Ⅵ) |
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| 引用本文： | 杨逸萍,刘革.示差脉冲吸附伏安法测定海水浪量Cr(Ⅵ)[J].厦门大学学报(自然科学版),1990(3). |
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| 作者姓名： | 杨逸萍 刘革 |
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| 作者单位： | 厦门大学海洋学系
(杨逸萍)，厦门大学海洋学系(刘革) |
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| 摘 要： | 在 4.5×10~(-2)mol/l NH_4Cl-5.4×10~(-2)mol/l NH_3-2×10~(-3)mol/l 铜铁试剂溶液(pH～9.5)中,用示差脉冲吸附伏安法测定海水中痕量 Cr(VI)。导数峰电位为-1.40 V(VS.Ag/AgCl)、峰电流与 Cr(VI)浓度在 0.05～1.2 ng/ml 范围内呈线性关系。检出限为 0.04 ng/ml。对 Cr(VI)含量为 0.35 ng/ml的海水样品,变异系数为 7.6％,平均回收率为92％。本法已应用于厦门近岸海水中 Cr(VI)的测定。
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| 关 键 词： | 铬 吸附伏安法 海水 |
Determination of Trace Cr(VI) in Sea water by Differential Pulse Adsorption Voltammetry |
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| Yang Yiping Dept. of oceanogLiu Ge.Determination of Trace Cr(VI) in Sea water by Differential Pulse Adsorption Voltammetry[J].Journal of Xiamen University(Natural Science),1990(3). |
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| Authors: | Yang Yiping Dept of oceanogLiu Ge |
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| Institution: | Yang Yiping Dept. of oceanogLiu Ge |
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| Abstract: | A differential pulse adsorption voltammetry has been developed for determination of trace Cr(VI) in seawater. It is based on a sensitive adsorptive catalytic wave of Cr(VI) cupferron complex in NH(4|+)-NH3 solution. The derivative peak potential of the wave is-1.40V (vs.Ag/AgCI). The derivative peak current is proportional to the concentration of Cr(VI) in the range of 0.05- 1.2ng/ml. The detection limit is 0.04 ng/ml. Coefficient of variation and average recovery for seawater sample with Cr(VI) concentration of 0.35ng/ml are 7.6% and 92% respectivelv. The procedure has been applied to determine Cr(VI) in seawater of Xiamen Bay. |
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| Keywords: | Chromium adsorption voltamrnetry Seawoter |
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