LpDNPH S10x Cartridge is an air sampling device designed for sampling in ambient, indoor, and industrial atmospheres carbonyls. Carbonyls are trapped on a high purity silica adsorbent coated with 2,4-dinitrophenylhydrazine, where they are converted to the hydrazone derivatives. The derivatives are eluted from the cartridge in acetonitrile and are analyzed by HPLC. The S10x cartridge is shorter than the S10 cartridge and designed to fit into automated instruments such as XonTech, Inc. and ATEC Atmospheric Technology. Using the S10x cartridge, the air sampling flow is in the direction opposite compared to the S10 cartridge in order to accommodate the instruments flow pattern.