Laboratory samples are typically extracted prior to analysis by sensitive GC-MS or LC-MS/MS methods to separate the analytes of interest from the bulk of matrix components that could interfere with the analysis. Typical extraction methods include liquid-liquid extraction or solid phase extraction strategies
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.
A multi-residue method for determination of five groups of 85 pesticides - organochlorine, carbamate, organophosphorous, pyrethroid and others - in non-fatty food, e.g. vegetables, fruits and green tea is described. The method is based on stir bar sorptive extraction (SBSE) coupled to thermal desorption...
An automated analysis system consisting of a dynamic headspace (DHS) system coupled with thermal desorption-Gas Chromatography/Mass Spectrometry (TD-GC/MS) was used for fully automated micro-scale chamber material emission analysis of Spray Polyurethane Foam (SPF).
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.
The forensic community has experienced an increasing emergence of New Psychoactive Substances (NPSs) in recent years. The fi ve main classes of NPSs include the synthetic cannabinoid compounds, stimulants such as the derivatives of cathinone, opioids such as fentanyl, psychedelics, and non-pharmaceutical benzodiazepines. The automated extraction and determination of other classes of NPS compounds using the GERSTEL MultiPurpose Sampler (MPS) roboticPRO have been previously developed and discussed.
In the work presented here, highly sensitive determination of around 100 contaminants in surface water in the concentration range from low double-digit to low triple-digit pg/L was performed.
In this document we describe a method developed to quantify persistent organic pollutants (POPs) including polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs) in dietary supplements using stir bar sorptive extraction (SBSE)-GCMS/ MS-isotope dilution mass spectrometry (IDMS).
A multi-residue method to determine five groups of 85 pesticides - chlorinated, carbamate, phosphorous, pyrethroid and others - in vegetables, fruits and green tea has been developed using stir bar sorptive extraction (SBSE) coupled to thermal desorption and retention time locked (RTL) GC-MS.
The influence of variations in desorption temperature, desorption flow and sample preparation on VDA 278 analysis method [1] robustness and reproducibility is studied using a wide variety of samples from automobile interior materials: polypropylene (PP) granulate, polyurethane (PU) foam, leather, Duroplastic plastics and paint.