摘要
研究了顶空-气相色谱法测定塑料中总碳挥发性有机物(TVOC)的方法。对样品平衡时间及平衡温度进行了优化,探讨了样品颗粒大小及载气对测试结果的影响。试验结果表明:以氮气和氦气作为载气时,二者测得的TVOC的线性相关性良好,均在0.9999以上;以氮气为载气,在120℃条件下平衡5 h做重复性和回收率试验,测得样品的重现性小于5%,回收率为107%。不同样品颗粒大小对测试结果影响很大。
A method of headspace-gas chromatography（HS-GC） was developed for determining total volatile organic content（TVOC） in plastics.The equilibration time and equilibrium temperature was optimized,and the sample weight and buffer gas of test portion were studied.The results showed under the heating conditions of 120 ℃ and 5 h,TVOC lineal correlation coefficient was above 0.9999 with nitrogen or helium buffer gas,recovery was 107%,sample repeated measurements of the TVOC relative standard deviation was less than 5%.The sample size had great influence on the test result.
出处
《广州化工》
CAS
2013年第2期88-90,共3页
GuangZhou Chemical Industry
