Articles & Whitepapers
The dual-layer LpDNPH sorbent tube is an air sampling device designed for sampling carbonyls (e.g. formaldehyde) in ambient, indoor, and industrial atmospheres. Carbonyls are trapped on our high-purity silica gel adsorbent coated with 2,4-dinitrophenylhydrazine (2,4-DNPH) where they are converted to stable hydrazone derivatives. The derivatives are eluted from the tube in acetonitrile and ...
Equipment & Solutions
The 571 Aldehyde Monitor is our most popular badge. Unlike other aldehyde badges, the 571 can used to monitor formaldehyde in the air for a 15 minutes STEL, as well as a 8 hour PEL, and for indoor air quality, 24 to 72 hours. Aldehydes are collected on a glass fiber filter treated with 2,4-dinitrophenylhydrazine and phosphoric acid. The sample filter is extracted with acetonitrile and analyzed ...