August 2021

HS-SPME-GC–MS was combined with OPLS-DA data analysis to tentatively identify eight chemical markers to differentiate the geographical origins of cigar leaf samples.

GC and TLC methods are demonstrated for quantification of stigmasterol 3-O-β-D-glucopyranoside (S3G), the main active component in the herbal nutraceutical Balanites aegyptiaca, an antihyperglycemic in Egyptian folk medicine.

This concise yet comprehensive overview of sample preparation for bioanalysis looks at sample preparation fundamentals, best practices, and modern trends—all illustrated with a case study.

How can we monitor the source and environmental impact of neglected oil and gas acquisition sites, and assess their impact over time?

How far can you get on optimizing a GC separation without changing the column? Pretty far, in fact.

In this first installment in a series on the causes of peak asymmetry, we discuss basic concepts in peak shape, explore poor fluidic connections as a common cause of peak tailing, and explain what to do about it.