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High Efficiency, Quantitative Dioxins Screening at the Level of Interest in Feed and Food Using Advanced GC–MS-MS
Paul Silcock, Dirk Krumwiede, Inge de Dobbeleer, and Hans-Joachim Huebschmann, Thermo Scientific POPs Centre of Excellence; and Alexander Kotz, CVUA Freiburg, European Union Reference Laboratory for Dioxins and PCBs in Feed and Food
In order for a screening technique to be suitable for regulatory dioxins analysis, it must comply with the specific regulations for screening methods and carry with it the ability to strongly correlate with the current "gold standard" confirmatory technique in analytical performance and quality control. |
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High Precision Pesticide Analysis in Produce Using GC Triple Quadrupole and U-SRM Mode
Inge de Dobbeleer, Joachim Gummersbach, Hans-Joachim Huebschmann, and Anton Mayer, Thermo Fisher Scientific
More than 400 pesticides have been monitored in several matrices such as wheat, blackcurrants, and cucumber. The results of the most challenging pesticides in terms of activity and response are highlighted, showing calibration curves, repeatability, and ion ratio stabilities. |
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Identification and Quantification of Impurities in Wines by GC–MS
Benedicte Gauriat-Desroy, Eric Phillips, Stacy Crain, and Trisa Robarge, Thermo Fisher Scientific (with special thanks to members of Enologic Center of Grezillac)
The ISQ GC–MS has the ability to detect several contaminants in wine at lower concentrations with a single-step, 2-min sample preparation ideal for use by the wine and beverage industry. The sequential full-scan/SIM acquisition method for detecting the impurities requires minimal training of personnel to provide accurate results. |
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Determination of Polycyclic Aromatic Hydrocarbons (PAHs) and Aliphatic Hydrocarbons in Fish by GC–MS-MS
Klaus Mittendorf, Laszlo Hollosi, Ebru Ates, and Katerina Bousova, Thermo Fisher Scientific Food Safety Response Center; Eric Phillips, Hans-Joachim Huebschmann, and James Chang, Thermo Fisher Scientific
This featured method can be applied to fish and other fatty seafood samples to simultaneously detect the presence of aliphatic hydrocarbons and PAH contamination from crude oil. From the profile using GC–MS-MS, the method can be used to characterize the source of contamination. |
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Determination of DEHP in Culture Media by GC–MS-MS Using PCI Ammonia
Jessie Butler, Pat O'Brien, and Stacy Crain, Thermo Fisher Scientific; and Viviane Yargeau, PhD, McGill University
Coupled with MS-MS, matrix interferences from biological samples are eliminated, enabling quantitation in the low µM levels in culture media. The ability of this method to isolate DEHP from other phthalates makes it very useful to those researching pharmacokinetic effects of this particular phthalate in animal and human studies. |
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The Determination of Organotins in Water Using Triple Quadrupole GC–MS-MS
Inge de Dobbeleer, Hans-Joachim Huebschmann, and Anton Mayer, Thermo Fisher Scientific
The European Union Water Framework Directive seeks to lower detection and reporting limits for many contaminants, including organotins. The Thermo Scientific TSQ Quantum XLS GC–MS-MS system provides detection and quantitation limits that go below regulatory requirements with the use of t-SRM. |
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The Determination of Anabolic Steroids in Human Urine Using the TSQ Quantum XLS
Inge de Dobbeleer, Simon Ellison, Joachim Gummersbach, Hans-Joachim Huebschmann, Anton Mayer, and Dwain Cardona, Thermo Fisher Scientific
In recent years, it has become clear that triple quadrupole technology with the highly selective hyperbolic quadrupole assembly provides the appropriate tools necessary for low concentration drug screening analysis. This note describes the identification and quanititation of anabolic steroids in urine matrix using the Thermo Scientific TSQ Quantum XLS mass spectrometer. |
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Simplification of the ASTM D3606 Method for the Determination of Benzene and Toluene in Gasoline
Andrea Caruso and Massimo Santoro, Thermo Fisher Scientific
The ASTM D3606 method is designed to determine benzene and toluene content in motor and aviation gasoline using packed columns and a TCD. This note describes the determination of these components in gasoline using the Thermo Scientific TRACE 1310 GC in a split/splitless-backflush configuration using capillary columns and FID, for a simple, fully automated analysis. |
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