溶剂聚沉-气相色谱法测定水性涂料中6种苯系物  

Determination of Six Benzene Series Compounds in WaterborneCoatings by Solvent Precipitation-Gas Chromatography

作　　者：杜谦 李京亚[1] 詹青卫 王彩虹 Du Qian;Li Jingya;Zhan Qingwei;Wang Caihong(Anhui Product Quality Supervision&Inspection Research Institute,Hefei 230000 China;Fuyang Normal University,Fuyang 236037,China)

机构地区：[1]安徽省产品质量监督检验研究院,安徽合肥230000 [2]阜阳师范大学,安徽阜阳236037

出　　处：《云南化工》2024年第5期73-76,共4页Yunnan Chemical Technology

基　　金：阜阳师范大学信息工程学院自然科学研究(一般)项目(FXG2020ZY02);安徽省大学生创新训练项目(s20211361901)。

摘　　要：利用正己烷溶剂聚沉解决乙酸乙酯与水性涂料形成的乳浊液问题,从而建立水性涂料中6种苯系物气相色谱法准确定量的检测方法。水性涂料加入乙酸乙酯等萃取剂后,会形成均一稳定的乳浊液,无法通过0.22μm的滤膜过滤。通过加入适当比例正己烷溶剂来破坏涂料的稳定体系,使涂料中胶性物质与固体颗粒聚沉,溶液体系澄清。苯系物在0.1~50μg/mL范围内线性关系良好,相关性为0.999,检出限为0.027~0.17 mg/kg,准确度为90.8%~109.5%,精密度为2.6%~7.4%。该方法相比国标更加绿色环保,更加定量准确和稳定,可用于实验室实际样品检测。Using n-hexane solvent precipitation to solve the problem of emulsion formation between ethyl acetate and water-based coatings,an accurate and quantitative detection method for six benzene series compounds in water-based coatings by gas chromatography was established.After adding extractants such as ethyl acetate to water-based coatings,a homogeneous and stable emulsion will be formed,which cannot pass through 0.22μm filter membrane filtration.By adding an appropriate proportion of n-hexane solvent to disrupt the stable system of the coating,the adhesive substances in the coating can agglomerate with solid particles,thus the solution system can be clarified.The linear relationship of benzene derivatives within the range from 0.1 to 50μg/mL is good,with a correlation of 0.999,a detection limit of 0.027-0.17 mg/kg,an accuracy of 90.8%-109.5%,and a precision of 2.6%-7.4%.This method is more environmentally friendly,accurate and stable in quantification compared to the national standard,and can be used for actual sample detection in the laboratory.

关 键 词：溶剂聚沉 气相色谱仪 苯系物 水性涂料 

分 类 号：O657.71[理学—分析化学]