合成材料老化与应用2023，Vol.52Issue(6)：67-70,4.
气相色谱法测定水性涂料中水分含量及其影响因素的研究
Determination of Water Content and Influencing Factors in Waterborne Coatings by Gas Chromatography
朱家俊 1彭军 1罗宇欣 1梁楸怡 1张海辉1
作者信息
- 1. 广州合成材料研究院有限公司,广东广州 510665
- 折叠
摘要
Abstract
This paper describes common methods for water content testing in waterborne coatings.The experimental efficiency and accuracy of water content determination by gas chromatography have been improved by improving the extraction reagents,ultrasonic extraction time,optimizing relative correction factors.The optimal analysis conditions are:adding 0.2g of isopropanol and 5mL DMF to a 0.5g sample,ultrasonic extraction for 13 minutes,and 1.0μL of supernatant analyzed by gas chromatography.Finally,the water content of five groups of waterborne coatings was determined by gas chromatography and Karl Fischer method.The experimental results showed that the relative standard deviation of water content determination by gas chromatography was 0.34％～0.78％,and the recovery rate was 96.85％～102.99％.It has better precision and accuracy than Karl Fischer method.关键词
水性涂料/水分含量/气相色谱法/卡尔费休法Key words
waterborne coatings/water content/gas chromatography/Karl Fischer method分类
化学工程引用本文复制引用
朱家俊,彭军,罗宇欣,梁楸怡,张海辉..气相色谱法测定水性涂料中水分含量及其影响因素的研究[J].合成材料老化与应用,2023,52(6):67-70,4.
