Liquid chromatography separations using gradient elution have the potential to be faster, give better detection limits, and have more flexibility than separations using isocratic elution. However, problems can occur with gradients. Some of these problems are inherent to the technique but can be avoided or accommodated with a little care. Others result from a poor understanding of gradient elution. In this new e-book, John Dolan, renowned LC expert and the longtime author of the "LC Troubleshooting" column in LCGC, presents the secrets to achieving success with gradient separations.
Paper spray-mass spectrometry vs. liquid chromtography-tandem mass spectrometry (LC-MS/MS): Can rapid screening rival the gold standard in ER drug testing?
Lorna Nisbet from the Leverhulme Research Centre for Forensic Science, discusses a GC–MS. technique developed to detect anabolic-androgenic steroids in e-cigarettes seized from Scottish prisons.
Kinjal Bhatt and Ina Varfaj trace their pull toward analytical science to a saturated chromatography peak and the moment their first chiral peaks separated.
Emma Macturk from LECO Corporation explains which forensic applications benefit from GC×GC’s greater peak capacity, and when the additional separation power may only provide limited benefits.
Koji Yamaguchi of the International University of Health and Welfare (Narita, Japan) discusses a novel derivatized liquid chromatography-tandem mass spectrometry (LC-MS/MS) method plus propofol glucuronide (PRG) marker which improves forensic propofol detection.