文章信息/Info

Title:

Determination of Hydrazine Nitrate by Automatic Potentiometric Titration

作者:

鄒展; 趙許群; 史海

（中國科學院大連化學物理研究所，遼寧 大連 116023）

Author(s):

ZOU Zhan; ZHAO Xuqun; SHI Hai

（Dalian Institute of Chemical Physics, Chinese Academy of Sciences，Dalian 116023, China）

關鍵詞:

電位滴定法; 硝酸肼; 硝酸銨; 容量法

Keywords:

potentiometric titration;  hydrazine nitrate;  ammonium nitrate;  capacity method

分類號:

O657��

DOI:

10.7502/j.issn.1674-3962.201803010

文獻標志碼:

A

摘要:

利用電位滴定法及氫氧化鈉標準溶液滴定溶液中硝酸肼濃度，對該方法的線性度、精密度、準確度等進行試驗分析，并用F-檢驗和t-檢驗分析將該方法與容量法進行對比。試驗結果表明：電位滴定法可用于硝酸肼濃度的檢測，在0.05~1.50 mol/L濃度范圍，線性關系相關系數R2為0��999 9；對同一檢測樣品進行5次滴定檢測，相對標準偏差為0.166 7%；消耗滴定液體積大于0.5 mL時，試驗相對誤差小于1.5%。分析對比發現，電位滴定法與容量法的測定結果無顯著差異。對該方法的干擾因素進行試驗研究，結果表明：溫度對該方法沒有影響；但是當待測液中存在硝酸銨時，硝酸銨可能會對檢測結果產生較大影響，可用丙酮將硝酸銨、硝酸肼分離。

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.