Hello everyone. I work in a Forensic Laboratory in New York. We mainly conduct basic qualitative and quantitative GC/MS or GC/FID/MS analysis of controlled substances.

This question is in regards to a recent article published in LCGC North America Oct 2004 (Vol 22, No. 10) entitled "Finding a Needle in a Haystack(Hinshaw)" in which the author talks about 1st and 2nd derivative chromatography. What are the practical applications of this and what literature resources are available?

I appreciate your feedback. Thanks.