Extending whole-air monitoring: Simultaneous cryogen-free analysis of PAMS ozone precursors and TO-15 air toxics from canisters in accordance with new Chinese air-monitoring regulations

Concerns over the harmful effects to human health of exposure to low levels of hazardous air pollutants have led to increasingly demanding VOC monitoring programs. Volatile hydrocarbons in urban atmospheres participate in photochemical reactions and are believed to contribute significantly to the formation of ozone and fine particulate (PM 2.5) pollution.

These ‘ozone precursors’ (often referred to as ‘PAMS’) comprise alkanes, alkenes, alkynes and aromatic hydrocarbons in the C₂–C₁₂ volatility range.

This application note describes cryogen-free sampling and analysis of the 108 analytes of a list of PAMS ozone precursors and TO-15 air toxics in high-humidity environments, in compliance with the requirements of Chinese EPA Method HJ 759 and the Chinese Environmental Air Volatile Organic Compound Monitoring Program.

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