Vacuum-Assisted Sorbent Extraction: An Analytical Methodology for the Determination of Ultraviolet Filters in Environmental Samples

Authors: María J. Trujillo-Rodríguez, Jared L. Anderson, Sage J. B. Dunham, Victoria L. Noad & Daniel B. Cardin Abstract Vacuum-assisted sorbent extraction (VASE) has been applied in combination with gas chromatography-mass spectrometry for the determination of UV filters in water samples. VASE is a variant of headspace extractionwhich was developed in conjunction with the sorbent […]

POSTER: Chemical Profiling of Cannabis Infused Products using Solvent-Free Headspace Extraction and Thermal Desorption GC-MS

Authors: Sage J. B. Dunham, Victoria L. Noad, Bailey S. Arakelian & Daniel B. Cardin Overview A solvent free headspace extraction approach – vacuum assisted sorbent extraction (VASE) – is applied in combination with thermal desorption (TD)-gas chromatography-mass spectrometry (GC-MS) to examine the chemical composition of cannabis and cannabis infused consumer products.  Application of VASE […]

POSTER: Cannabinoid & Terpene Profiling of Cannabis by Solvent-Free Headspace Extraction and Thermal Desorption-GC-MS

Authors: Sage J. B. Dunham, Victoria L. Noad, Bailey S. Arakelian & Daniel B. Cardin Overview The specific chemical composition of cannabis is responsible for the fragrance and flavor of the product, the experience of a recreational high, and the medicinal benefit.  In a phenomenon known as the “entourage effect”, evidence further suggests that compounds […]

A New Cryogenless TO15 Canister Preconcentrator with Reduced System Carry-Over When Exposed to Higher Concentration Samples

OVERVIEW A new preconcentrator design is presented which eliminates the need for liquid nitrogen or complicated electronic cooling while performing US EPA Method TO15 analysis . A new technology called Multi-Capillary Column Trapping System (patent  pending), or MCCTS, is used to concentrate all TO15 compounds at 35°C, which is achieved simply by using cooling fans. […]

POSTER: Trace-Level Quantification of SVOCs in Water via Vacuum Assisted Sorbent Extraction (VASE) Thermal Desorption-GC-MS

Authors: Sage J. B. Dunham, Victoria L. Noad, Bailey S. Arakelian & Daniel B. Cardin Overview Current analytical methods for evaluating volatile and semi volatile organic compounds (VOCs & SVOCs) in water often require large sample volumes (1 L or more), are labor intensive, and rely upon liquid-liquid extraction into organic solvents. Here we present a sensitive, […]

POSTER: Vacuum Assisted Sorbent Extraction (VASE) Thermal Desorption-GC-MS: A Robust, Solvent-Free Technique for Chemical Residue Analysis

Authors: Sage J. B. Dunham, Victoria L. Noad, Bailey S. Arakelian & Daniel B. Cardin Overview In the 30 years since the invention of solid phase microextraction (Belardi & Pawliszyn, 1989), headspace (HS) extraction has developed into a powerful family of techniques for both targeted and untargeted chemical analysis of volatile and semi volatile compounds. We recently developed […]

POSTER: Vacuum Assisted Sorbent Extraction (VASE) and a Dual-Column Thermal Desorption Approach for GC-MS Analysis of Trace-Level Polycyclic Aromatic Hydrocarbons (PAHs)

Authors: Victoria L. Noad, Sage J. B. Dunham, and Daniel B. Cardin Overview  • A new instrument design and methodology for trace-level headspace analysis of polycyclic aromatic hydrocarbons (PAHs) is described. • Using a 1 mL sample of water, quantitation from 5 ppt – 10 ppb is demonstrated for a wide range of polycyclic aromatic hydrocarbons […]

POSTER: Solvent-Free Terpene & Cannabinoid Profiling of Cannabis Consumer Products using Vacuum Assisted Sorbent Extraction (VASE) Thermal Desorption-GC-MS

Authors: Victoria L. Noad, Sage J. B. Dunham, and Daniel B. Cardin Overview Due to recent legislative changes, consumption of cannabis products are becoming accepted as a medical treatment and a mainstream recreational product worldwide including many US states and Canada.   Reliable analytical methods are critical to ensuring consistent dosing, efficacy, and safety. Current techniques […]

7200A – Fast US EPA TO15 Analysis Providing Higher Productivity using the new Entech 7200A and Agilent 7890B/5977 GCMS

INTRODUCTION Canister sampling and analysis for measurement of volatile chemicals is finding use in a growing number of diversified applications. This includes analysis of VOCs in Ambient Air, Indoor Air, Vapor Intrusion, Soil Gas, Landfill Gas, Stack Gas, Fixed Gas Cylinder Purity, and others. As the EPA Method TO15 market continues to grow, there is an increasing need to improve laboratory throughput. Reducing cycle […]

Performance Comparison – Volatiles Analysis of Samples with Elevated CO2 & Methane Levels. 7200 Packed-Trap Preconcentrator vs 7200CTS Capillary Column Trap Preconcentrator

Canister sampling and analysis for measurement of volatile chemicals is finding use in a growing number of diversified applications.