Analytical Chemistry Department, University of Valencia, Edifici Jeroni Muñoz, 50 Dr Moliner, 46100 Burjassot, Valencia, Spain.
Talanta. 2010 Mar 15;80(5):2041-8. doi: 10.1016/j.talanta.2009.11.001. Epub 2009 Nov 10.
Semipermeable membrane devices (SPMDs) were evaluated as passive samplers for the determination of 26 volatile organic compounds (VOCs) in contaminated air of occupational environments. A direct methodology based on the use of head-space-gas chromatography-mass spectrometry (HS-GC-MS) was developed for VOCs determinations in SPMDs, without any sample pre-treatment and avoiding the use of solvents. A desorption temperature of 150 degrees C for 10 min was sufficient for a sensitive VOCs determination providing limits of detection in the range of 15 ng SPMD(-1) for 21 of 26 studied compounds. Linear and equilibrium uptake models were established for each VOC from compound isotherms. Highly volatile compounds were slightly absorbed and moderately volatile compounds were strongly absorbed by SPMDs. This study is the first precedent of the use of SPMDs for the simultaneous sampling of a wide number of VOCs. The use of SPMDs is a simple and low cost alternative to ordinary sampling devices such as Radiello diffusive samplers or badge-type solid-phase supports.
半渗透膜装置（SPMDs）被评估为用于测定职业环境污染空气中 26 种挥发性有机化合物（VOCs）的被动采样器。开发了一种直接基于顶空-气相色谱-质谱联用（HS-GC-MS）的方法，用于 SPMD 中 VOCs 的测定，无需任何样品预处理，也避免了使用溶剂。150°C 下解吸 10 分钟足以进行灵敏的 VOCs 测定，对于 26 种研究化合物中的 21 种，检测限在 15 ng SPMD(-1)范围内。从化合物等温线建立了每个 VOC 的线性和平衡摄取模型。高挥发性化合物被 SPMD 轻微吸收，而中等挥发性化合物被强烈吸收。本研究是首次使用 SPMD 同时采样大量 VOCs 的先例。与 Radiello 扩散采样器或徽章型固相支撑等普通采样设备相比，SPMD 的使用是一种简单且低成本的替代方法。
