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28-08-2005
1. Introduction Transmission spectroscopy was the only method in general use until the early 1960s. The first applications of attenuated total reflection (ATR) or internal reflection spectroscopy were reported independently by Fahrenfort and Harrick. Especially macromolecular materials ...
28-08-2005
Abstract1st 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 ...
Continuous TOC determination in environmental analysis
27-05-2005
Identification of organic pollutants in wastewater is essential for performance evaluation, construction and operation of a wastewater treatment plant. Several parameters are currently used in wastewater analysis applications. Some of these are based on oxygen demand, for instance BOD ...
10-03-2005
The ESI-TOF mass spectrometers micrOTOF and micrOTOF focus do not only provide accurate mass measurements but additionally describe the True Isotopic Pattern TIPTM. For molecular formula generation this unique combination significantly reduces the number of possible formula candidates and the ...
Using design of experiments methodology means increased efficiency and improved product quality.
08-03-2005
Using design of experiments methodology means increased efficiency and improved product quality. Product quality in any arena can be traced back to variations in parts, materials, people, and processes. And since it has been observed that all work can be broken down into processes, all ...
01-02-2005
What analyst does not wish for a universal method for processing all his or her samples? Pressure digestion represents just such a procedure for sample digestions and is therefore one of the standard sample preparation procedures currently employed in analytical chemistry for element ...
27-01-2005
Microwave-assisted organic synthesis (MAOS) has become an increasingly popular discipline in modern chemical method development. This means that a modern, "dedicated" microwave reactor must provide also stirring, temperature measurement and pressure sensing. In the last decade, demands from ...
One Century of Chromatography with Twsett (1903)
01-10-2004
Tswett originated the chromatography with his work about the separation of chlorophyll in 1903. For some time it was relatively quite around this new technology. Exceptions were the workings of Kuhn and Lederer (1931) as well as of Hesse (1936 and 1942). A break through succeeded to E. Cremer ...
30-09-2004
#img3998# Since 1986 SRI Instruments Inc. (California) develops gas chromatography systems with the main objective to build an instrument which can easily be adapted to the customer's needs. The result was a modular built GC which can be equipped with up to six different detectors to cover a ...
29-09-2004
The Simulated moving bed (SMB) technology was developed in the '60s and used for large-scale separations of hydrocarbons in the oil industry. The SMB concept has been extended towards new fields of application since then, first in the large-scale food industry, e.g. separation of sugars, and ...
