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Accelerated Solvent Extraction (ASE) - the best way to prepare your GC and LC samples

ASE methods are established and accepted in the environmental, pharmaceutical, foods, polymer, and consumer products industries more

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Accelerated Solvent Extraction (ASE) - the best way to prepare your GC and LC samples

Tired of spending days on sample preparation? Tired of spending countless hours on labor-intensive sample preparation steps? Accelerated solvent extraction is an established technique for the extraction of solid and semisolid samples. The Thermo Scientific™ Dionex™ ASE™ 150 and 350 Accelerated Solve more

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• UGA researchers develop rapid diagnostic test for pathogens, contaminants
  

  Using nanoscale materials, researchers at the University of Georgia have developed a single-step method to rapidly and accurately detect viruses, bacteria and chemical contaminants. In a series of studies, the scientists were able to detect compounds such as lactic acid and the protein albumin in hi more

• VWR International, LLC Acquires VITRUM PRAHA S.R.O. and VITRUM ROZNOV S.R.O.

  VWR International, LLC announced that it has acquired VITRUM PRAHA S.R.O. and VITRUM ROZNOV S.R.O., two distributors of scientific laboratory supplies headquartered in Prague and Roznov. VITRUM PRAHA and VITRUM ROZNOV were founded in the early 1990's and are two well established independent distribu more

• Singapore Launches Infrastructure for Metrology in Chemistry (MiC)

  The National Metrology Centre (NMC) of the Agency for Science, Technology and Research (A*STAR) and the Health Sciences Authority (HSA) have jointly set up a national Metrology in Chemistry (MiC) infrastructure. Senior Minister of State for Trade and Industry and Education, Mr S. Iswaran announced t more

White papers Chemicals

• The New Genome Sequencer FLX System
  

  In 2005, the Genome Sequencer 20 System was introduced into the global life science market. Based on the revolutionary 454 sequencing technology, this system is able to generate hundreds of thousands of sequence reads in a few hours at a fraction of costs compared with the traditional Sanger technology. more

• The Determination of Hazardous Substances According to RoHS and WEEE Directives
  

  1st July 2006 is an important deadline for the electro- and electronics industries. This date bans hazardous substances like lead, cadmium, mercury, hexavalent chromium and polybrominated biphenyls and diphenyl ethers from electro- and electronic equipment. This restriction, even though in discussion since 1991, has become more and more important from year to year because of tons of electronic waste releasing toxic substances which are accumulated in the environment, the food chain and all human beings. In order to enforce the substances ban and the limitation or substitution of hazardous components, elemental analysis is obviously the most important control measure for monitoring limiting values. This requires precise analytical systems such as X-ray fluorescence, ICP- and atomic absorption spectrometers. These instruments are able to detect trace concentrations of hazardous compounds - for example cadmium, using an atomic absorption spectrometer in the flame atomization mode up to 0.1 mg/L, or using the di more

• Field-Flow Fractionation - The Universal Separation Principle for Particle and Macromolecule Characterization
  

  High molecular weight polymers, bio molecules or particles in a range of a few nanometers up to several microns are more and more important in science and technology. Many applications are based on the specific properties of these materials. For this reason, an exact knowledge of the molar mass or particle sizes distribution is essential for later application as well as for optimization of the production processes or quality control. In addition the knowledge about the chain structure of macromolecules or biopolymers as well as about the shape of particles is often necessary. For this reason those samples, which often can be very complex systems, have to be separated according to parameters such as e.g. hydrodynamic volume or molecular weight. After the separation process the resulting narrow dispersed fractions are detected with different techniques. more

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