单推三分析化验误差来源研究

单推三分析化验误差来源是多方面的,确定单推三分析过程误差来源,能为操作人员提供减少或消除误差的依据。影响单推三分析结果的主要因素有几个:标准溶液浓度的变化,滴定过程各终点的读数,环境温度的变化。在分析化验过程中,第一终点读数对硝酸肼、氨的分析结果不产生影响,但对肼有影响;第二终点读数对肼、氨分析结果有影响,但对硝酸肼无影响;第三终点读数对上述三种物质的分析结果都有影响,尤其是硝酸肼,其分析化验结果很容易超出要求范围。

Investigation of Errors for DT-3 Analysis Process

The sources of DT-3 analysis errors are various.Finding out these factors,can providing the theory support for reducingor or elimination the errors.Main errors factors of DT-3 analysis are as follows: concentration change of nitric acid standard solution,reading of end point in titration process,change of ambient temperature.In titration process of DT-3,the first equivalent point reading is responsible for errors of hydrazine but not for ammonia or hydrazine nitrate,the second equivalent point reading affects errors of hydrazine and ammonia but not hydrazine nitrate,the end point reading affects all errors of three substances.