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

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

Summary

This application note describes cryogen-free sampling and analysis of the 108 analytes of a combined list of PAMS ozone precursors and TO-15 air toxics in high-humidity environments, in compliance with the detection limit and data-quality requirements of Chinese EPA Method HJ 759 and the Chinese Environmental Air Volatile Organic Compound Monitoring Program. The use of Markes’ ground-breaking Dry-Focus3 pre-concentration and water management technology results in excellent chromatographic peak shape at 100% humidity, whilst maintaining sample-to-sample cycle times below 60 minutes. The use of robust, field-proven dual-column/ Deans switch technology in the GC oven allows FID analysis of highly volatile C₂ hydrocarbons, with the remaining analytes detected using a single-quadrupole mass spectrometer operating in full-scan mode.