摘要
苯系物作为常见污染物,浓度高,危害大,是重点监测对象,但适用于高浓度苯系物测试的方法准确性有待提高。通过模拟苯系物废气进行一系列实验,结果表明PTFE气袋的回收率最高,苯系物的回收率在43.2%~99.7%之间,其中苯和甲苯回收率较高,与在线监测的比对表明根据苯系物的回收率曲线对分析结果进行修正,可以有效提高测试准确性。
As common pollutants, benzene series has been the focus of the environmental monitoring with high concentration and great harm, but the accuracy of bags method which is suitable for high concentration test decreases with the extension of storage time. On the basis of ensuring the accuracy of the test, this paper simulated the exhaust gas containing benzene series, then conducted a series of experiments. The results show that among the market bags, PTFE bag has the highest recovery rate, and the rate is between 43.2 % and 99.7 % with stored for 2 h to 72 h, among the five kinds of benzene series, the recoveries of benzene and toluene are relatively higher, while the recoveries of ethylbenzene, xylene and styrene are relatively lower. Compared with the on-line monitoring value, it shows that correcting the analysis data according the recovery curve of benzene series can effectively improve the accuracy of the test.
作者
郑芳
Zheng Fang(Fujian Guohuan Testing Co.,Ltd.,Longyan 364000,China)
出处
《广东化工》
CAS
2020年第24期127-129,共3页
Guangdong Chemical Industry
关键词
气袋法
苯系物
回收率
PTFE
bags method
benzene series
recovery rate
PTFE
