Improvement of spectrophotometric method based on Russell mechanism for detection of ·OH concentration in liquid

doi:10.11949/j.issn.0438-1157.20161636

CIESC Journal ›› 2017, Vol. 68 ›› Issue (7): 2805-2811.DOI: 10.11949/j.issn.0438-1157.20161636

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Improvement of spectrophotometric method based on Russell mechanism for detection of ·OH concentration in liquid

ZHAO Haiqian¹, GAO Xingcun¹, LIU Chenghao¹, WANG Zhonghua¹, ZHOU Wei², GAO Jihui²

1 Institute of Civil Engineering & Architecture, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
2 College of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China

Received:2016-11-18 Revised:2017-03-18 Online:2017-07-05 Published:2017-07-05
Contact: 10.11949/j.issn.0438-1157.20161636
Supported by:
supported by the National Natural Science Foundation of China (51606036, 91434134) and the Heilongjiang Science Funds for Youths (QC2014C047).

基于Russell机理分光光度法检测液相体系·OH浓度的改进

赵海谦¹, 高杏存¹, 刘城昊¹, 王忠华¹, 周伟², 高继慧²

1 东北石油大学土木建筑工程学院, 黑龙江大庆 163318;
2 哈尔滨工业大学能源科学与工程学院, 黑龙江哈尔滨 150001

通讯作者: 赵海谦
基金资助:
国家自然科学基金项目（51606036，91434134）；黑龙江省青年科学基金项目（QC2014C047）。

Abstract

Abstract:

Spectrophotometric method based on Russell mechanism for detection of ·OH concentration in liquid has many advantages, such as low-cost, simple operation, and so on. However, low precision and poor repeatability are its main disadvantages. The reason of this method's low precision was elucidated, and a modified method was proposed. The influence of typical cations and anions on extraction of Fast Blue BB salt (FBBs) was analyzed. Key operating conditions for the modified method was determined. Based on the results, a relationship between ·OH concentration and absorbance of diazosulfones was rebuilt. The interference of FBBs in the diazosulfone extraction process is the main reason of low precision. FeSO₄ has a strong ability to hold back extraction of FBBs by extraction agent, which decreases influence of FBBs on diazosulfones detection violently. Na⁺, K⁺, NO₃^- do not have obvious effects on the detection result, while Cl^- influence is in relation to its concentration. The conditions for the modified method are: extraction time 300 s and molar ratio of FBBs to methylsulfinic acid (MSIA) is 50. The function relationship between ·OH concentration and absorbance is obtained.

Key words: liquid system, ·OH, spectrophotometric method, Russell mechanism, modified method

摘要：

基于Russell反应机理检测液相体系·OH浓度的分光光度法具有费用低、操作简单等优点，但测试精度低、重复性差是该方法面临的主要问题。分析了该方法精度低的主要原因，提出改进型方法，分析了常见阴阳离子对萃取剂萃取坚牢蓝BB盐（FBBs）的影响，确定了改进型方法的关键检测条件，在此基础上重新建立了·OH浓度与重氮砜产物吸光度之间的函数关系。结果表明：FBBs的干扰是造成检测精度低的根本原因；FeSO₄对抑制萃取剂萃取FBBs作用明显，从而大幅度削弱FBBs的干扰；Na⁺、K⁺、NO₃^-几乎对重氮砜产物的吸收峰不产生影响，Cl^-对测试结果的影响与其浓度有直接关系；改进型方法的合理萃取时间为300 s，FBBs与甲基亚磺酸（MSIA）摩尔比为50；并得到了·OH浓度与吸光度之间的函数关系式。

关键词: 液相体系, ·OH, 分光光度法, Russell反应机理, 改进型方法

CLC Number:

X132

ZHAO Haiqian, GAO Xingcun, LIU Chenghao, WANG Zhonghua, ZHOU Wei, GAO Jihui. Improvement of spectrophotometric method based on Russell mechanism for detection of ·OH concentration in liquid[J]. CIESC Journal, 2017, 68(7): 2805-2811.

赵海谦, 高杏存, 刘城昊, 王忠华, 周伟, 高继慧. 基于Russell机理分光光度法检测液相体系·OH浓度的改进[J]. 化工学报, 2017, 68(7): 2805-2811.

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Improvement of spectrophotometric method based on Russell mechanism for detection of ·OH concentration in liquid

基于Russell机理分光光度法检测液相体系·OH浓度的改进

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