无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
Chemical Analysis & Monitoring

容量法测定卤水中碘含量的不确定度评定

  • 于立娟 ,
  • 李广义 ,
  • 袁玉霞 ,
  • 闫修正
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  • 1.山东省海洋精细化工重点实验室,山东潍坊 262737
    2.山东省海洋化工科学研究院
于立娟(1982— ),女,工程师,硕士研究生,主要从事海洋化工科学研究工作;E-mail: ylj1115@163.com

收稿日期: 2020-02-10

  网络出版日期: 2020-08-12

Uncertainty evaluation in determination of iodine content in brine by volumetric method

  • Lijuan Yu ,
  • Guangyi Li ,
  • Yuxia Yuan ,
  • Xiuzheng Yan
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  • 1. Shandong Provincial Key Laboratory of Ocean Fine Chemical,Weifang 262737,China
    2. Shandong Ocean Chemical Industry Scientific Research Institute

Received date: 2020-02-10

  Online published: 2020-08-12

摘要

为提高容量法测定卤水中碘含量的准确度,对饱和溴水法测定碘含量做了评定。从碘酸钾标准溶液配制、硫代硫酸钠标准溶液标定、卤水样品测定3个方面归纳不确定度来源。通过建立数学模型,给出了测定卤水中碘含量的各不确定度分量的详细评定过程,由各不确定度分量求得了碘含量的合成标准不确定度及扩展不确定度,当置信水平为95%时,得出卤水中碘含量的测定不确定度为17.52±0.116 mg/L。

本文引用格式

于立娟 , 李广义 , 袁玉霞 , 闫修正 . 容量法测定卤水中碘含量的不确定度评定[J]. 无机盐工业, 2020 , 52(8) : 84 -87 . DOI: 10.11962/1006-4990.2019-0507

Abstract

In order to improve the accuracy of the volumetric method for the determination of iodine content in brine,the determination of iodine content by saturated bromine water method was evaluated.The source of uncertainty was summarized from three aspects,such as the preparation of potassium iodate standard solution,calibration of Na2S2O3 standard solution and brine sample determination.The detailed evaluation process of uncertainty components in measurement of iodine content in brine was given by establishing mathematics model.Synthesis standard uncertainty and expanded uncertainty of iodine content were obtained by the uncertainty components.The uncertainty of measurement of iodine content in brine was 17.52±0.116 mg/L in the level of 95% confidence level.

参考文献

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