Sigma-Aldrich articles

This volume features Air Monitoring products that are used the petrochemical industry to ensure worker and community safety. 

Supelco's air monitoring products are useful for sampling of indoor (workplace) air and ambient air for a wide variety of analytes, such as aldehydes, volatile organic chemicals (VOC), benzene, toluene, ethyl benzene and xylene (BTEX) and other polyaromatic compounds (PAC).

In this special edition you'll find valuable information on the tools you n

GC analysis coupled with Nitrogen-Phosphorous detection could selectively detect organophosphorous pesticides with low background in comparison to MS detection.

The clean-up protocol using acetonitrile/MgSO₄ extraction and dual layer carbon/PSA SPE cleanup resulted in acceptable recoveries for a majority of the pesticides studied. The recoveries were improved by optimizing the toluene content of the SPE elution solvent to 35% toluene-65% acetone.

The recovery of org