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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。
It is considered that the reason for the low reduction rate when measuring nitrate by the cadmium - copper method is excessive reduction, and the experimental method for judging the existence of excessive reduction is introduced. The factors that affect the degree of excessive reduction and the solutions are also studied.