热脱附-气相色谱联用测定环境空气中苯系物

Determination of Benzoles in Ambient Air with Heat Adsorption - Gas Chromatography Method

介绍了通过Tenax-TA吸附管吸附苯系物建立热脱附—气相色谱联用测定环境空气中苯系物的方法。利用具有二次解吸功能的热脱附仪测定苯系物,当采样体积为3 L时检出限达到5×10^(-5)mg/m^3,准确度测定在标准样品给定范围内,苯系物样品在Tenax-TA吸附管中可保留12 d。该方法灵敏度高、重现性好、准确可靠、操作简便,适合于环境空气中苯系物的检测。

The method of determining benzoles in ambient air with heat adsorption - gas chromatography through adsorption of benzoles with Tenax -TA adsorption tube was introduced. In determining benzoles with thermal adsorption instrument which had two - stage desorption performance, when the sampling volume was 3 L, the detection limit could reach 5 ×10^-5mg/m^3the accuracy was within the given range of standard sample, and the benzoles sample could remain in Tenax - TA adsorption tube for 12 days. Conclusion showed that the method had advantages of high sensitivity, good reproduction quality, accurate, dependable, and simple for operation, which was suitable for determinatirm of benzoles in ambient air.