John D. and Frances H. Larkin Professor of Chemistry Emeritus


  • B.S., Upsala College
  • Ph.D., Rutgers University

Research: Determination of pesticides, pigments, amino acids, lipids, phospholipids, carbohydrates, and carboxylic acids in biological samples by thin layer chromatography (TLC); analysis of food ingredients, additives, and contaminants by TLC; analysis of phytochemical and synthetic dietary supplements, synthetic and herbal medicines; and cosmetic ingredients by TLC; and comparative evaluation of different materials, techniques, and instruments used in TLC. Chemistry-Biology interdisciplinary research program with Biology Professor Bernard Fried supported for the last 15 years by five Dreyfus Foundation Senior Scientist Mentor Program awards.

Selected Publications:

  • Effects of coexposure with Echinostoma caproni and Schistosoma mansoni miricidia on glucose and maltose levels in Biomphalaria glabrarta as determined by thin layer chromatography-densitometry. Sage Hartlaub*, Dolcie DeGrandchamp*, Bernard Fried, and Joseph Sherma, Journal of Liquid Chromatography & Related Technologies 38, 1160-1163 (2015).
  • Effects of Schistosoma mansoni and high temperature on the lipid composition of Biomphalaria glabrata as determined by high performance thin layer chromatography and densitometry. Alexandra Hunsberger*, Bernard Fried, and Joseph Sherma, Journal of Planar Chromatography-Modern TLC 28, 157-161 (2015).
  • Transfer of Minilab TLC screening methods to quantitative HPTLC-densitometry for pyrazinamide, ethambutol, isoniazid, and rifampicin in a combination tablet. Jacob Strock*, Mai Nguyen*, and Joseph Sherma, Journal of Liquid Chromatography & Related Technologies 37, 2956-2970 (2014).
  • Comparative study of the quantification of thin layer chromatograms of a model dye using three types of commercial instruments and image analysis with Image J. Nevena Popovic* and Joseph Sherma, Trends in Chromatography, 9, 21-28 (2014).

* undergraduate student coauthors