Bruce A Tomkins Research Staff -- Environmental Chemistry Contact tomkinsba@ornl.gov | 865.341.5111 All Publications Xylan hydrolysis in Populus trichocarpa P. deltoides and model... Stable Carbon and Nitrogen Isotope Ratios of Sodium and Potassium Cyanide as a Forensic Signature... Thin-Layer Chromatography/Desorption Electrospray Ionization Mass Spectrometry: Investigation of Goldenseal Alkaloids... Quantitation of Cotinine in Nonsmoker Saliva Using Chip Based Nanoelectrospray Tandem Mass Spectrometry... Self-Aspirated Atmospheric Pressure Chemical Ionization Source for Direct Sampling of Analytes on Surfaces and in Liquid Solu... Quantitative Caffeine Analysis Using a Surface Sampling Probe Electrospray Ionization Tandem Mass Spectrometry System... Quantitative Thin-Layer Chromatography/Mass Spectrometry Analysis of Caffeine Using a Surface Sampling Probe Electrospray Ion... Key Links ORCID Organizations Physical Sciences Directorate Chemical Sciences Division Nuclear Analytical Chemistry Section Radioactive Materials Analytical Lab Group