Purity requirement: VDI 2083 sheet 14 (AMC) in preparation

Beer tasted after tin cans, white powder becomes by the packing foil pink, galvanized steel racks or art articles and kirchenfenster corrodes due to of aggressive air. What happens there? Completely simply said: It takes place a chemical attack. Technically expressed: The characteristics of the materials change by effect of chemical/molecular contamination. That can be desired, as e.g. Geschmacksveraenderer or additives are added, in order to obtain or produce around alloys with mix beverages the "correct" taste, which technical characteristics e.g. the conduction of chips by "doping" are changed in such a way that the chip is increased either uselessly will or that its achievement.Since the destruction by dust or dirt effect, caused by living or dead particles, is as far as possible investigated and by the conventional clean-room technology well into the grasp to be gotten is, now the "still smaller" Kontaminanten interests us, beginning within the lower range of the nano-particles. So that also within this chemical/molecular range everything happens with "right things", the international standard DIN ISO 14644-8 was provided, itself with the classifications of Kontaminanten, their allocation and the different measuring and analysis systems, which employ AMC (in the pure room air molecular Kontaminanten present).Based on it at present the guideline VDI develops 2083 sheet 14, which itself with the industry-specific problem fields of electronics over pharmacy up to food production busily and it makes possible for the user, already in the apron to employ the necessary considerations toward the chemical Kontaminanten the contamination to measure and separate and/or, if possible, to avoid. The draft of this guideline will appear prospective in the summer 2007. Andreas's Mach Mueller, MCRT (chairman VDI 2083 sheet 14)