Rapid emissions screening
|Formaldehyde monitoring || |
Formaldehyde is too reactive to monitor by TD–GC–MS, and must instead be sampled onto DNPH cartridges, which generate a stable derivative. These cartridges are then analysed by high-performance liquid chromatography (HPLC). More on formaldehyde monitoring.
Emissions screening tests, for example using micro-scale chambers (covered in ASTM D7706 and ISO 16000-25) complement reference tests by providing a quicker and simpler way of assessing emissions for routine industrial applications.
The principle mirrors that of certification methods, with testing carried out under a flow of pure, humidified air. VOCs and SVOCs emitted by the sample pass into the chamber/cell air and are collected using sorbent tubes, which are then analysed by TD–GC–MS. The small volume of micro-chambers and the ability to raise the temperature to force emissions allows up to six samples to be collected in an hour.
By implementing rapid emissions screening in a routine factory-production (quality control) environment, using micro-scale chambers such as Markes’ Micro-Chamber/Thermal Extractor can reduce the burden of testing. This can aid the development of low-emitting, higher-value products, and allow a company to take advantage of new market opportunities and therefore differentiate itself from competitors.