Ralph defended his PhD dissertation on December 16, 2024 and will graduate in May 2025. Meanwhile, he will be starting a job as an analytical chemist at Tessera Therapeutics outside Boston, MA in January. Congratulations Ralph!
In this issue of the Journal of the American Society for Mass Spectrometry, we are delighted to highlight the work of 19 early career researchers. Their articles comprise the 2024 ASMS “Emerging Investigators” Special Issue and represent a truly global issue with contributors from across the USA, Europe and Australia. The investigators come from a…
Development of a cyclic ion mobility spectrometry-mass spectrometry-based collision cross-section database of permethylated human milk oligosaccharides Sanaz C. Habibi, Victoria R. Bradford, Sophie C. Baird, Shadrack Wilson Lucas, Christopher D. Chouinard, and Gabe Nagy* J. Mass Spectrom. 2024, 59, 8, e5076 Publication Date: July 23, 2024 https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/full/10.1002/jms.5076 Human milk oligosaccharides (HMOs) are an important class of biomolecules…
Dr. Chouinard and Heidi attended the International Society for Ion Mobility Spectrometry (ISIMS) in Miami Beach and Heidi was recognized with one of the Best Student Poster awards. Congrats Heidi!
Dr. Christopher D. Chouinard, Assistant Professor Dr. Chouinard was born and raised in the small town of Grafton, MA. His interests in chemistry and biology brought him south, where he attended University of North Carolina at Chapel Hill (Go Tar Heels!) and furthered his passion for analytical chemistry. After briefly working as a project manager…
Three Undergrads Honored at Chemistry Departmental Awards Ceremony On Friday, April 12th, the Clemson Chemistry Department hosted its annual Honors and Awards Event. The Chouinard Group was well represented, with three undergrad students taking home well-deserved awards! Undergraduate Awards in Analytical Chemistry: Copeland Johnson Chemistry Faculty Award: Walker Hodges Warwick Chemical Foundation Award in Chemistry: Breland Jones Congratulations…
Mass spectrometry has been the technique of choice in anti-doping labs since the Los Angeles Olympic Games in 1984. Since then, a combination of targeted tandem mass spectrometry and high-resolution techniques have been used to quantify and identify anabolic steroids and other performance-enhancing drugs, respectively. Recently, the promise of ion mobility-mass spectrometry (IM-MS) has been…
Walker Hodges Named College of Science “Outstanding Undergraduate in Discovery” Walker Hodges, a chemistry major in the Chouinard Research Group, has established himself as a leader in the reactions subgroup performing reactions on different isomeric compounds. One application of this research is to help provide analysis for organizations like the World Anti-Doping Agency to prevent…
Protomers, or prototropic isomers, are protonation site isomers than can be resolved using ion mobility spectrometry. Dating back to their first report by Karpas et al. in 1990, decades of literature have studied their fundamental properties. Recently, our group and others have identified the presence of protomers for many fentanyl analogues, owing to their multiple…
Where the resolving power of IM-MS techniques is insufficient to differentiate challenging isomers, various chemical approaches have been used to alter their mobility with the goal of better separations. We are primarily focused on simple, fast, and inexpensive reactions targeting common steroid functional groups. Thus far, we have published on reactions with ozone, simple carbonyls…