College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.
Environ Sci Process Impacts. 2020 Apr 29;22(4):973-980. doi: 10.1039/c9em00445a.
Cyclic volatile methyl siloxanes (cVMSs) and benzene series compounds have attracted increasing attention because they are associated with various adverse health effects. In this study, we developed and validated a novel passive air sampling method (PAS), using Tenax-TA as the sorbent, to measure the concentrations of cVMSs (D4, D5, and D6) and benzene series compounds simultaneously in indoor air. The uptake rates (R), which were calibrated side-by-side by an active air sampling method (Tenax-TA-AAS), ranged from 0.10 to 0.56 mL min-1 depending on chemicals, and the R of the TD tube with Tenax-TA was controlled by the sampler material-side and not the air-side. The passive sampling efficiency (PSE) of styrene and m,p-xylene was close to 1. Based on Pearson correlation analysis, a negative correlation was found between the molecular weight of compounds and their uptake rates. Furthermore, the calibrated Tenax-TA-PAS method was used to quantify cVMSs and benzene series compounds in a living room and an office environment in the urban area of Dalian, China. The concentrations of toluene were the highest in both the living room (10.4 μg m-3) and office (7.02 μg m-3) among the target compounds.
环状挥发性甲基硅氧烷（cVMS）和苯系物因与各种健康不良影响有关而受到越来越多的关注。在本研究中，我们开发并验证了一种新的被动式空气采样方法（PAS），使用 Tenax-TA 作为吸附剂，同时测量室内空气中 cVMS（D4、D5 和 D6）和苯系物的浓度。根据化学品的不同，通过活性空气采样方法（Tenax-TA-AAS）进行旁侧校准的吸收率（R）范围为 0.10 至 0.56 mL min-1，并且 Tenax-TA 的 TD 管的 R 由采样器材料侧而不是空气侧控制。苯乙烯和间二甲苯的被动采样效率（PSE）接近 1。基于 Pearson 相关分析，发现化合物的分子量与其吸收率之间存在负相关关系。此外，使用校准的 Tenax-TA-PAS 方法对中国大连市城区的一个客厅和一个办公室环境中的 cVMS 和苯系物进行了定量分析。在目标化合物中，甲苯在客厅（10.4 μg m-3）和办公室（7.02 μg m-3）中的浓度最高。
