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Dispensing for trace analysis

In trace analysis high-purity acids, bases and hydrogen peroxide are dispensed. However, measurement results must not be influenced by impurities more

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• New sensor array detects single molecules for the first time

  MIT chemical engineers have built a sensor array that, for the first time, can detect single molecules of hydrogen peroxide emanating from a single living cell. Hydrogen peroxide has long been known to damage cells and their DNA, but scientists have recently uncovered evidence that points to a more more

• Weizmann Institute Scientists Develop a Unique Approach for Splitting Water into Hydrogen and Oxygen
  

  Weizmann Institute scientists have devised a unique new mechanism for the formation of hydrogen and oxygen from water, without the need for sacrificial chemical agents, through individual steps, using light. The design of efficient systems for splitting water into hydrogen and oxygen, driven by sun more

• MIT nanotubes sniff out cancer agents in living cells

  MIT engineers have developed carbon nanotubes into sensors for cancer drugs and other DNA-damaging agents inside living cells. The sensors, made of carbon nanotubes wrapped in DNA, can detect chemotherapy drugs such as cisplatin as well as environmental toxins and free radicals that damage DNA. "We more

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• 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

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