T-C复合吸附管应用于室内空气中低沸点挥发性有机物测定  

Application of T-C Composite Adsorption Tube in the Determination of Low-boiling Volatile Organic Compounds in Indoor Air

作　　者：梁缉攀 余塘 江伟武 戴静 LIANG Ji-pan;YU Tang;JIANG Wei-wu;DAI Jing(Guangdong Academy of Building Research Group Co.,Ltd,Guangzhou 510500,China;The Construction Quality Supervision and Inspection Station of Zhuhai,Zhuhai 519015,China)

机构地区：[1]广东省建筑科学研究院集团股份有限公司,广东广州510500 [2]珠海市建设工程质量监督检测站,广东珠海519015

出　　处：《分析测试学报》2025年第3期527-533,共7页Journal of Instrumental Analysis

基　　金：国家认监委认证认可科技支撑计划项目(认办科[2017]11号,2017RJWKJ15)。

摘　　要：室内空气挥发性有机物检测中常用的Tenax TA吸附管在采集低沸点挥发性有机物时易出现样品穿透的问题,显著影响检测结果的准确性。该研究利用吸附-热解吸/气相色谱法对比分析了Tenax TA吸附管和TC复合吸附管采集常见的低沸点挥发性有机物时的穿透曲线及采样吸附率,并进一步考察了T-C复合吸附管的样品解吸率、方法准确度及精密度。结果表明,相比于Tenax TA管,T-C复合吸附管采集低沸点挥发性有机化合物时的性能更优,可有效避免样品穿透的发生,采样吸附率不小于98.4%,样品解吸率大于99.7%,目标物质量在0~2.00μg范围的标准曲线相关系数不小于0.997 4,方法回收率为95.7%~112%,相对标准偏差为1.5%~6.3%,说明T-C复合吸附管可应用于装饰装修材料及室内空气中低沸点挥发性有机物的检测。The sorbent tube packing containing Tenax TA is widely used to detect volatile organic compounds(VOCs)in indoor air.But it´s important to recognize that sample penetration can happen easily when sampling the low-boiling VOCs,which can seriously affect the accuracy of the data obtained.In this study,after gathering the typical low-boiling VOCs,the breakthrough curves and absorption rates of adsorption tubes packed with Tenax-TA and T-C composite were compared using adsorption-pyrolysis/gas chromatography.Additionally,employing T-C composite adsorption tubes for adsorption-thermal desorption/gas chromatography,the desorption rate,accuracy and precision of this method were also examined.These results showed that the T-C composite tube performed better in adsorbing VOCs with low boiling points than Tenax TA,which prevented sample penetration.Adsorption and desorption rates were not less than 98.4%and 99.7%,respectively.Furthermore,the calibration curves for target compounds were linear in the range of 0-2.00μg with correlation coefficients not less than 0.9974.And the average recoveries ranged from 95.7%to 112%,with relative standard deviations(RSDs)of 1.5%-6.3%.The previous results indicated that the T-C composite adsorption tube would be a useful tool for accurately identifying VOCs with low-boiling points from indoor air and decorative materials.

关 键 词：低沸点 挥发性有机物 穿透 T-C复合吸附管 室内空气 气相色谱 

分 类 号：O657.7[理学—分析化学] X132[理学—化学]