New study shows compliance of Markes’ equipment with Chinese air monitoring regulation
Wednesday, 9 January 2019 at 11:37:AM
A new application note released by Markes International shows how the company’s air monitoring equipment provides excellent performance for a 117-compound set of air pollutants specified in a recent Chinese regulation, without the cost and inconvenience of using liquid cryogen.
Hazardous airborne volatiles – 117 compounds
The new regulation is described in the document
‘Environmental Air Volatile Organic Compound Monitoring Program in Key Areas in
2018’, which has been published by the Chinese Ministry of Environmental
Protection. It requires the monitoring of 117 compounds comprising three
categories of hazardous airborne volatiles – PAMS ozone precursors, TO-15 air
toxics, and oxygenated volatile organic compounds (OVOCs). Achieving good GC
performance for this range of compounds in one run typically requires liquid
nitrogen, which is expensive and makes it difficult to run unattended analyses.
Operates entirely without liquid cryogen
The new study shows how such issues can be avoided by the
use of Markes’ ground-breaking preconcentration and water-management
technology, which operates entirely without liquid cryogen. The report also
demonstrates excellent chromatographic peak shape across the whole compound
list at 100% relative humidity, while maintaining sample-to-sample cycle times
below 60 minutes. In particular, the performance criteria were met for very
volatile C2 hydrocarbons, oxygenated polar VOCs such as formaldehyde,
acetaldehyde, acrolein and ethanol, as well as less volatile air toxics such as
Download Application Note 146 for full experimental conditions and results.