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Thermo Fisher Scientific ITQ 700 GC-Ion Trap Mass Spectrometer Offers Enhanced Selectivity - Thermo Fisher Scientific ITQ 700 GC-Ion trap mass spectrometer offers enhanced selectivity and accuracy in Multi-Residue Pesticide Analysis in Green Tea (NYSE: TMO)
Thermo Fisher Scientific ITQ 700 GC-Ion Trap Mass Spectrometer Offers Enhanced Selectivity

 

PRZOOM - /newswire/ - Austin, TX, United States, 2009/07/07 - Thermo Fisher Scientific ITQ 700 GC-Ion trap mass spectrometer offers enhanced selectivity and accuracy in Multi-Residue Pesticide Analysis in Green Tea (NYSE: TMO).

   
 
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Thermo Fisher Scientific Inc., the world leader in serving science announces another significant gain in laboratory productivity highlighted in a new application note. Combining the low detection levels achievable with the Thermo Scientific ITQ 700 GC-ion trap mass spectrometer with a QuEChERS sample preparation method allows laboratory scientists to greatly enhance sample throughput without sacrificing levels of detection. This milestone is highlighted in the company's latest application note "Multi-residue Pesticide Analysis in Green Tea by a Modified QuEChERS Extraction and Ion Trap GC/MSn Analysis" which details how to perform accurate, dependable multi-residue pesticide analysis in green tea following sample preparation using the QuEChERS method.

Recently-formulated pesticides are smaller in molecular weight than their predecessors and are designed to break down rapidly in the environment. As a result, to successfully identify and quantify these compounds in foods, more careful consideration must be placed on the sample preparation for extraction and the instrument parameters for analysis. The QuEChERS sample preparation method, published recently as AOAC Method 2007.01, has considerably simplified the determination of pesticides in fruits, vegetable, grains and herbs.

The study was performed by coupling the ITQ 700 with the Thermo Scientific FOCUS GC gas chromatograph in order to determine the linear ranges, quantitation limits and detection limits for a partial list of pesticides that are commonly used on green tea crops. Samples were prepared in matrix using the QuEChERS sample preparation guidelines for analysis by gas chromatography/tandem mass spectrometry (GC/MSn) on the ITQ 700. Caffeine and polyphenols were removed from the samples prior to injection. A Thermo Scientific TRACE TR-Pesticide III 35% diphenyl/65% dimethyl polysiloxane column was chosen to improve the resolution of the more polar compounds.

A single splitless injection of 22 pesticides was performed with detection in electron ionization (EI) MS/MS. Multiple matrix spikes were analyzed at both high and low levels to verify the precision of the analytical method. The MS/MS scan mode offered significantly enhanced selectivity over scanning modes such as full scan and selected ion monitoring (SIM). The ITQ 700, operated in the MS/MS mode, generated unique product ion spectra by collision-induced fragmentation of each of the detected pesticides. Because of the highly effective elimination of matrix interfering ions, more accurate results were produced at the lower levels.

Thermo Scientific is part of Thermo Fisher Scientific, the world leader in serving science.

About Thermo Fisher Scientific
Thermo Fisher Scientific, Inc. (thermo.com) is the world leader in serving science, enabling our customers to make the world healthier, cleaner and safer. With 2008 revenues of $10.5 billion, we have approximately 34,000 employees and serve over 350,000 customers within pharmaceutical and biotech companies, hospitals and clinical diagnostic labs, universities, research institutions and government agencies, as well as environmental and industrial process control settings. Serving customers through two premier brands, Thermo Scientific and Fisher Scientific, we help solve analytical challenges from routine testing to complex research and discovery. Thermo Scientific offers customers a complete range of high-end analytical instruments as well as laboratory equipment, software, services, consumables and reagents to enable integrated laboratory workflow solutions. Fisher Scientific provides a complete portfolio of laboratory equipment, chemicals, supplies and services used in healthcare, scientific research, safety and education. Together, we offer the most convenient purchasing options to customers and continuously advance our technologies to accelerate the pace of scientific discovery, enhance value for customers and fuel growth for shareholders and employees alike.

For further press information please contact: Celine Callender, The Scott Partnership, 1 Whiteside, Station Road, Holmes Chapel, Cheshire. CW4 8AA United Kingdom T: +44 1477 539539 F: +44 1606 1477 539540 E: thermo[.]scottpr.com.

 
 
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Thermo Fisher Scientific ITQ 700 GC-Ion Trap Mass Spectrometer Offers Enhanced Selectivity

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