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AN1107: Determination of Anions and Carboxylic Acids in Urban Fine Particles (PM2.5)

Instrument Type: IC

Ionic forms of air pollutants are analyzed here using anion-exchange chromatography and suppressed conductivity. The gas sample included particles < 2.5 um (PM2.5) was collected using ambient ion monitoring and then dissolved in deionized water. The dissolved inorganic anions and organic acids were separated on a 4 mm i.d. IonPac AS11-HC column and detected by suppressed conductivity. This method provided analysis of more ionic contaminants than standard methods (EPA Method 26A) and ASTM D5085-02). An ICS-6000 can be used for this application.

加速溶剂萃取- 气质联用法测定PM2.5 中的多环芳烃

Instrument Type: GCMS

本文采用加速溶剂萃取- 气质联用法(ASE-GC/MS)测定PM2.5 中的多环芳烃,样品前处理只需要20min 即可完成,无须经过繁琐的人工前处理过程,与传统的索氏提取相比, 加速溶剂萃取不仅时间消耗少, 试剂消耗量少, 并且操作简单, 回收率高。同时,ISQ 单四极杆质谱为检测多环芳烃提供超高的灵敏度、检出限,能够满足PM2.5 中痕量的PAHs 的检测需求。