湖北农业科学 ›› 2019, Vol. 58 ›› Issue (13): 111-113.doi: 10.14088/j.cnki.issn0439-8114.2019.13.023

• 检测分析 • 上一篇    下一篇

Na2S2O3溶液标定方法改进试验

李伟, 熊健, 周毅, 杨灿   

  1. 西藏大学理学院,拉萨 850000
  • 收稿日期:2018-12-24 出版日期:2019-07-10 发布日期:2019-12-06
  • 通讯作者: 熊健,女,讲师,(电子信箱)568284825@qq.com。
  • 作者简介:李伟(1986-),男,湖北汉川人,讲师,硕士,主要从事基础化学实验教学及科研工作,(电话)15089050225(电子信箱)liwei05416@163.com。
  • 基金资助:
    西藏大学青年培育基金项目(ZDCZJH18-08); 2017年环境化学与生态毒理学国家重点实验室开放基金项目(KF2017-07); 2018年中央支持地方高校改革发展专项(藏财教指[2018]54号)

An improved method for calibrating the concentration of Na2S2O3 solution

LI Wei, XIONG Jian, ZHOU Yi, YAN Can   

  1. Science School,Tibet University,Lhasa 850000,China
  • Received:2018-12-24 Online:2019-07-10 Published:2019-12-06

摘要: 通过单因素和正交试验,以H2O2标准溶液间接标定Na2S2O3溶液。结果表明,25%磷酸6 mL,20 g/L碘化钾液40 mL和0.821 8 mol/L H2O2液1.00 mL在30 ℃下反应30 min,试验效果最好,标准偏差S=0.09%,并与重铬酸钾法测定结果比较,F检验分析无显著性差异。该法绿色环保,可用于Na2S2O3溶液的标定。

关键词: Na2S2O3溶液, 标定, 方法, 改进

Abstract: In order to study the optimum conditions for calibrating the concentration of Na2S2O3 solution with known concentration of H2O2 solution, the results were analyzed by single factor and orthogonal experiment. The experimental results showed that the concentration of 0.821 8 mol/L H2O2 solution 1.00 mL,20 g/L KI solution 60 mL and 25%H3PO4 6 mL solution for 30 min. The experimental results were the best, the standard deviation s was 0.09%, and compared with the results of K2Cr2O7 method. The experimental results were analyzed by F test, no significant difference. The method of green environmental protection, can be used as an method of calibrating Na2S2O3 solution concentration.

Key words: Na2S2O3 solution, calibration, method, improvement

中图分类号: