电位滴定法测硝酸肼-中国材料进展

文章信息/Info

Title:: Determination of Hydrazine Nitrate by Automatic Potentiometric Titration

Author(s):: ZOU Zhan; ZHAO Xuqun; SHI Hai; （Dalian Institute of Chemical Physics, Chinese Academy of Sciences，Dalian 116023, China）

Keywords:: potentiometric titration; hydrazine nitrate; ammonium nitrate; capacity method

摘要:: 利用电位滴定法及氢氧化钠标准溶液滴定溶液中硝酸肼浓度，对该方法的线性度、精密度、准确度等进行试验分析，并用F-检验和t-检验分析将该方法与容量法进行对比。试验结果表明：电位滴定法可用于硝酸肼浓度的检测，在0.05~1.50 mol/L浓度范围，线性关系相关系数R2为0999 9；对同一检测样品进行5次滴定检测，相对标准偏差为0.166 7%；消耗滴定液体积大于0.5 mL时，试验相对误差小于1.5%。分析对比发现，电位滴定法与容量法的测定结果无显著差异。对该方法的干扰因素进行试验研究，结果表明：温度对该方法没有影响；但是当待测液中存在硝酸铵时，硝酸铵可能会对检测结果产生较大影响，可用丙酮将硝酸铵、硝酸肼分离。

Abstract:: This paper used potentiometric titration and NaOH standard solution to determine the concentration of hydrazine nitrate solution. The method was evaluated from linearity, precision and accuracy, and was compared with the capacity method by F-test and t-test. The results showed that potentiometric titration method could be used to determine the concentration of hydrazine nitrate. The linear relationship parameter R2 was 0.999 9 when the concentration is in the range of 0.05~1.50 mol/L; the relative standard deviation was 0.166 7% when testing the same solution for 5 times. And testing relative error less than 1.5%, when the consumption of titration liquid was more than 0.5 mL. There was no significant difference in measurement values between potentiometric titration and the capacity method. Through the analysis of the disturbing factors, it was found that the temperature had no effect on the method. However, when ammonium nitrate was present in the tested solution, it might have a great influence on the test results. Acetone can be used to separate ammonium nitrate and hydrazine nitrate.