This proprietary normal phase sorbent is topped with sodium sulfate to remove any excess water and is used for the extraction of hydrocarbons from environmental samples.
The quaternary amine group on this sorbent remains positively charged under all conditions, giving a strong anion-exchange mechanism of retention.
Related content
Combining elemental analysis and molecular techniques to characterize Ancient Egyptian mummification balms
Analysis of characteristic flavor compounds in coffee peels subjected to different thermal processing treatments based on GC–IMS and HS-SPME–GC–MS combined with chemical pattern recognition