苏玛罐采样GC/MS法测定空气中的臭氧前驱物

The Determination of PAMS in Air by GC/MS with Canister Sampling

研究了环境空气中臭氧前驱物的气相色谱质谱方法。采用苏玛罐采样-冷阱富集,MS检测环境空气中臭氧前驱物(PAMS),臭氧前驱物RSD%在4.0%～24.4%之间。测定结果的相对标准偏差均小于30%。得到了良好的分离效果、较宽的线性关系和较高的灵敏度,方法在保存样品稳定性、保证方法检测限及提高分析化合物的种类等方面均有较大优势,适用于空气中低浓度挥发性有机物的监测。

A determination methed of Photochemical ozone creation Potentials（PAMS）in environmental air by pre-concentration and gas chromatography mass spectrometry was studied.PAMS RSD% was between 4%~24.4%.The relative standard deviation was less than 30%.A good separation effect,wide linearity and high sensitivity was got,the method had greater advantages in preservation sample stability,ensuring the method detection limits and improving the analysis of compound classes,and was applicable to air VOC in low concentration monitoring.