Chromatography 7 New QuEChERS Performance Standards Kit
Sourcing individual pesticide standards and preparing working standards is expensive and time-consuming. Food safety laboratories can simplify standard preparation and better ensure data quality by using Restek’s new QuEChERS performance standards kit for initial method evaluation and ongoing performance validation. The QuEChERS performance standards kit was specifically designed to provide low-cost ‘entry level’ mixes for food safety and contract laboratories that want to evaluate the QuEChERS extraction approach (e.g., EN 15662 and AOAC 2007.1) for determining pesticides in fruits and vegetables with GC and LC instrumental methods.
A QuEChERS performance standards kit is ideal for broad class work because it provides a wide range of commonly used organochlorine, organonitrogen, organophosphorus, and carbamate fungicides and insecticides, while still keeping the total number of analytes to a reasonable level. Volatile, polar, active, base-sensitive, and nonvolatile compounds are included to allow comprehensive evaluation of QuEChERS extraction and cleanup efficiencies, and optimisation of GC and LC instrumental conditions.
These multiresidue pesticide standards are precisely formulated to ensure accuracy, and analytes are segregated into mixes based on chemical compatibility for maximum storage stability. Quantitative analysis confirms the composition of each mixture, and documentation for each lot is provided. Restek® accreditation.
QuEChERS performance standards are produced and tested in accordance with ISO Guide 34 and 17025
Restek offers complete solutions for labs running QuEChERS methods. Visit
www.restek.com /quechers for addtional QuEChERS reference materials, QuEChERS extraction salts, QuEChERS dispersive SPE cleanup tubes, GC and LC columns and accessories.
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Launch of Chromatography Detector Triggers Record Downloads of Light Scattering White Paper
The launch of Malvern Instruments’ Viscotek SEC- MALS 20 chromatography detector has triggered record downloads of one of the supporting white papers ‘Static light scattering technologies for GPC/ SEC explained’, underlining the enthusiasm amongst users for straightforward information on GPC/SEC analysis. The recent addition of Viscotek SEC-MALS 20 to Malvern’s range of detectors puts the company in the unique position of being the sole provider of every commercially available light scattering technology for GPC/SEC. Customers can therefore be assured of a truly unbiased choice of detector solutions. The popular white paper is just one of a suite of educational information and application notes provided by Malvern’s specialist team to help users select the right detector for their application.
http://j.mp/1aYVuUA.
“The new Viscotek SEC-MALS 20 is being very well received,” said Paul Clarke, Malvern Instruments’ Product Group Manager for Nanoparticle and Molecular Characterisation. “Customers are really welcoming this extension to our offering in light scattering detector technology and our ability to provide completely unbiased advice when it comes to selecting the most suitable chromatography detector for the application.”
Light scattering GPC/SEC detectors are used to determine absolute molecular weight, a key parameter in protein, polymer, and macromolecular research. The new Viscotek SEC MALS 20 can be added to any existing GPC/SEC set-up and delivers market-leading, highly accurate MALS detector performance, even at the more challenging high molecular weights. Viscotek SEC-MALS 20 offers the greatest number of detectors of any commercially available MALS detector for GPC/SEC. This, in combination with high quality detectors at low angles and an innovative optical cell design, delivers excellent sensitivity and accuracy for all molecule types.
For more information on Malvern’s range of light scattering detector solutions - including right angle, low angle and multi angle light scattering detectors - visit the Malvern Instruments website.
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