This study describes the sampling and analysis of a combined list of PAMS ozone precursors, TO-15 air toxics and OVOCs at high humidity, without the use of liquid nitrogen or other cryogen. The method described complies 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’ groundbreaking Dry-Focus3 preconcentration and water management technology results in excellent chromatographic peak shape at 100% humidity, while 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 and C3 hydrocarbons, with the remainder detected using a single quadrupole mass spectrometer.
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