Aroma Office 2D (Gerstel K.K.) is an integrated software approach for simultaneous processing of both retention index (RI) and mass spectral (MS) data for rapid and improved identification of flavor compounds. The program can be integrated into Agilent Chemstation Software and searches are performed using CAS numbers of candidate compounds after library searching and corresponding…
In this study, we developed a 2-Step MVM approach, which enables the uniform enrichment of aroma compounds with vapor pressures (VP) <20 kPa in fermented food samples, while eliminating high concentrations of Ethanol as well as water. The 2-Step MVM consists of two different DHS method parameter sets. In the first DHS sampling step at…
Standard (SBSE) and Solvent-Assisted (SA-SBSE) Stir Bar Sorptive Extraction were both applied for profiling of flavor compounds in a matrix-heavy beverage sample. Unlike standard SBSE, SA-SBSE uses a solvent swollen polydimethylsiloxane (PDMS) stir bar for extraction and enhanced recovery of polar compounds. After extraction compounds were recovered from both stir bars by liquid desorption (LD)…
Alcoholic and non-alcoholic beverages are enjoyed by millions of people around the globe. The aroma and flavor profiles of each product are unique and made up from a variety of semi-volatile and volatile compounds including aldehydes, ketones, acids, alcohols, terpenes, esters along with various trace level compounds. Monitoring of these compounds is a necessity for…
A new fully automated thermal desorption (TD)-GC/MS method was developed for determination of formaldehyde and other airborne carbonyls as well as VOCs for material emission testing. The method includes an automated in-situ derivatization agent loading step prior to every sampling step, thus blank values are avoided. Pentafluorophenylhydrazine (PFPH) was used as derivatization agent and was…
Food products are routinely monitored for quality, authenticity, and safety. Analysis of food products may also be necessary due to off flavoro odor complaints. The aroma and flavor profiles of each product are unique and made up from a variety of semi-volatile and volatile compounds including aldehydes, ketones, acids, alcohols, terpenes, esters and other trace…
This study describes the use of the GERSTEL MultiPurpose Sampler (MPS) fitted with a Thermal Desorption Unit (TDU) and a Cooled Injection System (CIS 4) PTV-type Inlet for the automated direct thermal extraction analysis of packaging for three different brands of crème-fi lled chocolate sandwich cookies, cheese-filled sandwich crackers and soft and chewy candy. Download…
Antibiotics are a class of antimicrobial veterinary drugs widely used to control disease in food producing animals including egg laying chickens. However, antibiotics can migrate into and accumulate in the egg of the chicken being treated. Eating eggs that contain antibiotic residues could provoke allergic reactions or lead to the development, or dominance of resistant…
The manual transfer of liquid samples is part of daily activities throughout the analytical laboratory. The accurate and precise transfer of liquid samples can be critical to the analytical results. Liquid samples with high viscosities pose several challenges to achieving accurate and precise delivery of desired volumes. Automating the accurate transfer of such viscous liquids…
The number of cannabis containing products, such as extracts, tinctures, edibles, waxes and oils, available in the United States has increased significantly due to changes in state law and the 2018 Farm Bill. Cannabis concentrates are legally manufactured for both medicinal and recreational use and are quickly becoming more commonly used than the Cannabis sativa…
The number of cannabis containing products, such as extracts, tinctures, edibles, waxes and oils, available in the United States have increased significantly due to changes in state law and the 2018 Farm Bill. Cannabis concentrates are legally manufactured for both medicinal and recreational use and are quickly becoming the most commonly used products by consumers…
3-MCPD and Glycidol and especially their fatty acid esters are process contaminants that are formed, for example, when edible oils and fats are refined. At least some of the above-mentioned substances are classified as potential human carcinogens, a fact which has prompted the introduction of rules and regulations that specify tolerable daily intake values and…
Organotin compounds have a great many applications which include stabilizers, catalysts, biocides, and pesticides. One of the more significant uses was that of biocides employed as anti-fouling paint on sea-going vessels which has contributed to coastline contamination throughout the world. Although their use as a biocide in anti-fouling paint was completely banned in 2008, residual…
1,2,3-Trichloropropane (TCP) was used in the past as an industrial solvent, a cleaning and degreasing agent, and in the manufacture of soil fumigants. It is currently used as a chemical intermediate in the production of other chemicals such as polysulfone liquid polymers, dichloropropene, and hexafluoropropylene. It is also used as a cross-linking agent in the…
Although analysis of VOCs by purge and trap is considered a mature technique, advances in methodology and refinement of instrumentation are still being developed. This application note presents suggested operating conditions for the 4760 purge and trap and the 4100 autosampler. Download PDF
USEPA Method 524.2 has been used by laboratories for many years for the analysis of volatile organic compounds in drinking water by purge and trap concentration with detection using Gas Chromatography/Mass Spectrometry (GC/MS). This method requires an 11 minute purge at 40 mL/minute and a 4 minute desorb. The 4 minute desorb transfers a significant…
Organophosphorus pesticides were among the most widely used pesticides until the twenty-first century. They have a variety of uses in agriculture, home, garden, and veterinary practices. Thirty-six are registered in the United States, but because of their additive toxicity, many are being discontinued for use.1 These pesticides persist in the environment and are present in…
The analysis of Benzene, Toluene, Ethylbenzene, Xylenes, and Methyl-tert-butyl ether is a common analysis performed in many laboratories. BTEX compounds are naturally occurring constituents in crude oil and are created and used during the processing of refined petroleum products and during the production of chemical intermediates for many consumer products. BTEX compounds represent some of…