卡尔·费休滴定法测定日用消费品中含水量及影响因素探讨

doi:10.3969/j.issn.1001-1803.2020.04.012

日用化学工业 ›› 2020, Vol. 50 ›› Issue (4): 282-286.doi: 10.3969/j.issn.1001-1803.2020.04.012

• 分析与检测 • 上一篇

卡尔·费休滴定法测定日用消费品中含水量及影响因素探讨

沈正超¹,郑亚斌¹,高美平²,聂磊²,李国傲²,杜振霞¹()

^1. 北京化工大学化学学院,北京 100029
^2. 北京市环境保护科学研究院城市大气挥发性有机物污染防治技术用北京市重点实验室,北京 100037

收稿日期:2019-08-16 修回日期:2020-03-20 出版日期:2020-04-22 发布日期:2020-04-24
通讯作者: 杜振霞
作者简介:沈正超（1996-）,男,博士研究生,电话：18811768924,E-mail：18811768924@163.com。

Determination of moisture content in consumer products by Karl Fischer titration and its interfering factors

SHEN Zheng-chao¹,ZHENG Ya-bin¹,GAO Mei-ping²,NIE Lei²,LI Guo-ao²,DU Zhen-xia¹()

^1. College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China
^2. Beijing Key Laboratory for VOCs Pollution Prevention and Treatment Technology and Application of Urban Air, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China

Received:2019-08-16 Revised:2020-03-20 Online:2020-04-22 Published:2020-04-24
Contact: Zhen-xia DU

摘要/Abstract

摘要：

作为国家的标准方法,卡尔·费休滴定法已广泛用于测试产品中的水分含量,其具有精度高、分析速度快和操作简便等优点。但此方法在测试复杂样品时,准确度受到诸多外界因素的干扰。用卡尔·费休滴定容量法测定了8类,共计85个日用消费品中的含水量,探讨了样品中离子的干扰、含水量过高、电极表面污染等因素对测定结果的影响及解决方法,旨在为测定日用消费品中含水量提供一套较为准确合理的测试方法。

关键词: 卡尔·费休滴定法, 日用消费品, 水含量

Abstract:

As a standard method in China, Karl Fischer titration has been widely used to determine moisture content in products, which has the advantages of high accuracy, rapid and convenient operation. But the accuracy of this method is affected by many external factors when complex samples are determined. The Karl Fischer titration volumetric method was applied to the determination of moisture content in 8 categories of 85 consumer products. The influence of various factors, such as ionic interference in the sample, excessive water content of samples, surface contamination of electrodes and so on during the process of water determination were analyzed, and then discussed the corresponding solutions. The purpose is to provide a more accurate and reasonable water content test method for consumer products.

Key words: Karl Fischer titration, consumer products, moisture content

中图分类号:

C913.33

沈正超,郑亚斌,高美平,聂磊,李国傲,杜振霞. 卡尔·费休滴定法测定日用消费品中含水量及影响因素探讨[J]. 日用化学工业, 2020, 50(4): 282-286.

SHEN Zheng-chao,ZHENG Ya-bin,GAO Mei-ping,NIE Lei,LI Guo-ao,DU Zhen-xia. Determination of moisture content in consumer products by Karl Fischer titration and its interfering factors[J]. China Surfactant Detergent & Cosmetics, 2020, 50(4): 282-286.

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参考文献 18

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样品	处理前含水量/%	处理后含水量/%	相对误差 /%
烫发产品A（软化液）	76.93	74.61	3.06
烫发产品A（定型液）	87.04	85.37	1.94
烫发产品B（软化液）	79.83	79.66	0.21
烫发产品B（定型液）	87.04	85.37	1.94
消毒液A	86.63	67.23	25.22
消毒液B	85.43	65.91	25.80

模拟样品含水量/%	实际含水量均值/%	相对误差/%
4.00	4.24	0.24
7.00	7.02	0.02
10.00	10.19	0.19
40.00	39.02	0.98
70.00	68.66	1.32
100.00	101.43	1.43

测试结果/%						RSD/%
1 2 3 4 5 6						RSD/%
53.87	53.74	52.86	51.97	51.21	53.05	1.95

加标量/%	实际样品含水量/%	测试结果/%						RSD/%	加标回收率/%
加标量/%	实际样品含水量/%	1	2	3	4	5	6	RSD/%	加标回收率/%
10	66.66	77.20	77.34	76.90	77.46	77.33	77.70	2.49	106.64
20 30	59.26 51.85	80.61 82.46	80.30 83.66	80.98 82.98	80.12 83.90	80.10 83.63	80.55 83.50	1.69 1.70	104.25 105.02

	含水量测试结果/%						RSD/%
	1	2	3	4	5	6
电极清洗前	60.60	61.24	58.28	61.19	60.10	62.81	2.47
电极清洗后	53.87	53.74	52.86	51.97	51.21	53.05	1.95

卡尔·费休滴定法测定日用消费品中含水量及影响因素探讨

Determination of moisture content in consumer products by Karl Fischer titration and its interfering factors

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