顶空气相色谱测定含铅透明塑料中挥发性组分及含量  

Determination of volatile components and contents in lead-containing transparent plastics by headspace gas chromatography

作　　者：王芳 张博 段梦婷 郭新涛 张明[2] WANG Fang;ZHANG Bo;DUAN Mengling;GUO Xintao;ZHANG Ming(Department of Materials Research,AVIC Manufacturing Technology Institute,Beijing 100024;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002)

机构地区：[1]中国航空制造技术研究院材料应用研究部,北京100024 [2]扬州大学化学化工学院,扬州225002

出　　处：《分析试验室》2021年第4期439-443,共5页Chinese Journal of Analysis Laboratory

基　　金：装备预研中航工业联合基金(6141B05140207)项目资助。

摘　　要：将一定量含铅透明塑料样品置于密闭顶空瓶内,在100℃加热平衡60 min,取上层气体进行检测,得出挥发性物质主要为丙烯酸正丁酯(BA)和苯乙烯(St),其含量分别为86.2和3.52 mg/g,相对标准偏差是6.6%和8.1%。加标回收实验表明,BA与St的平均回收率分别为60.2%和60.8%。将含铅透明塑料在80℃热处理50 h后,挥发性组分BA和St含量降为未处理时的63.88%和52.16%;100℃热处理50 h后,BA和St含量降为未处理时的37.39%和10.97%。因此,高温处理能够有效降低材料当中残留的挥发性组分。A certain amount of lead-containing transparent plastic sample was placed in a closed headspace bottle,and heated at 100℃for 60 min,the upper gas was then taken for detection.The results showed that the mainly volatile substances in lead-containing transparent plastics were n-butyl acrylate and styrene.The contents of them were 86.19 and 3.52 mg/g,and the relative standard deviations were 6.6%and 8.1%,respectively.The standard recovery experiment showed that the average recovery rates of n-butyl acrylate(BA)and styrene(St)were 60.2%and 60.8%,respectively.After thermal treatment at 80℃for 50 h,the content of BA and St in the lead-containing transparent plastics decreased to 63.88%and 52.16%,respectively.After thermal treatment at 100℃for 50 h,those contents decreased to 37.39%and 10.97%,respectively.Therefore,hightemperature post-treatment was capable of reducing the residual volatile components in the material effectively.

关 键 词：含铅透明塑料 顶空气相色谱 丙烯酸正丁酯 苯乙烯 后处理 

分 类 号：O657.7[理学—分析化学]