本篇应用案例介绍了一种采样和分析方法，主要针对空气中一系列具有挑战性的痕量挥发性和半挥发性全氟烷基与多氟烷基化合物(PFAS)。使用了赛默飞具有突出性能的ISQ7610单四极杆气相色谱质谱仪(GC–MS)技术和 Markes International 的TD100-xr™ 自动热脱附 (TD) 系统，该系统无需制冷剂，完全符合相关国际标准方法。1–5 所用方法在测试的多种目标化合物中均展现了的方法性能（线性、重复性、储存稳定性等），即使化合物浓度为低于ppt 级。

参考资料

1. EN ISO 16017: Indoor, ambient and workplace air – Sampling and analysis of volatile organic compounds by sorbent tube/thermal desorption/ capillary gas chromatography– Part 1: Pumped sampling.

2. US EPA TO-17: Determination of volatile organic compounds in ambient air using active sampling onto sorbent tubes.

3. ISO 16000-6: Indoor air – Part 6: Determination of organic compounds (VVOC, VOC, SVOC) in indoor and test chamber air by active sampling on sorbent tubes, thermal desorption and gas chromatography using MS or MS FID.

4. ASTM D6196: Standard practice for choosing sorbents, sampling parameters and thermal desorption analytical conditions for monitoring volatile organic chemicals in air.

5. HJ 759: Ambient air.Determination of volatile organic compounds.Collected by specially-prepared canisters and analysed by gas chromatography/ mass spectrometry.