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Method for detecting calcium ions in seawater
Authors
丁家旺
刘淑文
秦伟
Publication date
26 February 2021
Publisher
Abstract
本发明涉及钙离子的检测,具体地说是一种海水中钙离子的检测方法。以聚合物膜钙离子选择性电极为工作电极,采用三电极体系,通过施加脉冲恒电流方式对海水中钙离子进行定量检测。本发明通过对所施加阴极脉冲电流的时间和大小优化,电极在10‑3—10‑2M Ca2+活度范围内(海水中钙活度)呈超能斯特响应,响应斜率为104mV/dec,与传统电位分析方法相比,该检测方法能够有效提高电极对钙离子检测的灵敏度。该电极对海水中高含量的Na+、Mg2+、K+具有很好的选择性,且具有良好的重复性和稳定性。将该电极应用于实际海水钙离子浓度的检测,检测结果与真实海水中钙离子的浓度相吻合
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Last time updated on 14/02/2024