镉-铜法测定海水中硝酸盐的过度还原问题

THE EXCESSIVE REDUCTION PROBLEMS IN NITRATE ANALYSIS (Cd-Cu METHOD)

认为用镉 -铜法测定硝酸盐时还原率低的原因是过度还原 ,并介绍了判断过度还原存在与否的实验方法 ,研究了影响过度还原程度的因素及解决方法。

Usually it is considered that the nitrate reduction column should be reactivated if the reduction efficiency is less than 95 %,because the reduction column has low reduction ability, but this study indicated that the low reduction efficiency may also caused by excessive reduction. A simple experiment method to determine whether excessive reduction has occurred was introduced, and the factors which influenced the excessive reduction degree were discussed.