MIL-101(Cr)吸附/热脱附-气相色谱-质谱法检测苯系和氯代VOCs  

Determination of Benzene Series and Chlorinated VOCs by MIL-101(Cr)Adsorption/Thermal Desorption-Gas Chromatography and Mass Spectrometry

作　　者：张玉 崔进[1] 梅连瑞 史芯沂美 ZHANG Yu;CUI Jin;MEI Lian-rui;SHI Xin-yi-mei(Tianjin Product Quality Inspection Technology Research Institute,Tianjin 300384,China)

机构地区：[1]天津市产品质量监督检测技术研究院,天津300384

出　　处：《分析测试学报》2024年第6期875-882,共8页Journal of Instrumental Analysis

基　　金：天津市市场监督管理委员会科技计划项目(2021-W02)。

摘　　要：以金属有机骨架材料MIL-101(Cr)为填料构建了一种新型吸附采样管,将其与热脱附-气相色谱-质谱联用实现了15种典型苯系和氯代挥发性有机物(VOCs)的检测。结果显示,15种VOCs在0~100 ng范围内呈良好的线性关系,相关系数(r2)达到0.99以上,检出限为0.7~1.9 ng。在5、30、70 ng添加量下,15种VOCs的平均回收率分别为86.0%~126%、91.7%~133%和77.6%~135%,相对标准偏差(RSD)分别为6.6%~18%、2.9%~20%和1.3%~20%。MIL-101(Cr)填料吸附管测试稳定性和不同批次吸附管重复性的RSD分别为0.50%~14%和0.30%~18%。MIL-101(Cr)填料吸附管基于质量更少的填料实现了对苯系和氯代VOCs更高效的吸附、富集和热脱附,有助于降低吸附采样管的气体穿透风险。该研究拓展了MOFs材料在环境检测领域的实际应用场景。A new sampling adsorption tube with MIL-101(Cr)as the filler was constructed,which can be used in thermal desorption-gas chromatography-mass spectrometry for the quantitative detec⁃tion of 15 typical benzene series and chlorinated volatile organic compounds(VOCs).15 VOCs showed good linear relationship in the ranges of 0-100 ng,with the correlation coefficients(r2)above 0.99.The detection limits of 15 VOCs were 0.7-1.9 ng.The average recoveries of MIL-101(Cr)packing tubes were 86.0%-126%,91.7%-133%and 77.6%-135%at the spiked dosage of 5 ng,30 ng and 70 ng VOC target pollutant,respectively.The relative standard deviations(RSDs)were 6.6%-18%,2.9%-20%and 1.3%-20%,respectively.And the RSDs of the test stability and repeat⁃ability of MIL-101(Cr)packing tubes were 0.50%-14%and 0.30%-18%,respectively.MIL-101(Cr)packing adsorption tube achieves more efficient adsorption enrichment and thermal desorption of benzene series and chlorinated VOCs based on less mass filler,which helps to reduce the penetration risk of sampled gas.This study expands the practical application scenarios of MOFs materials in the field of environmental monitoring.

关 键 词：金属有机骨架 MIL-101(Cr) 热脱附-气相色谱-质谱法 吸附管 挥发性有机物 

分 类 号：O657.7[理学—分析化学] X132[理学—化学]