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Veränderungen als "kontinuierliche Verbesserungen"? - Akkreditierungsanforderungen an Laboratorien
(2015)
Zurzeit sind einige für Laboratorien wichtige internationale Normen in Überarbeitung, darunter DIN EN ISO/IEC 17025 als die wohl wichtigste. Das wird für die Laboratorien Veränderungen mit sich bringen. Aber auch unabhängig von Normenrevisionen ändern/verschärfen die Akkreditierungsstellen ihre Anforderungen, worauf die akkreditierten Laboratorien sich einstellen müssen.
Large-volume instrumental photon and neutron activation analysis (IPAA resp. INAA) was used for
investigation of shredded electronic waste material. Sample masses from 1 to 150 grams were analysed
to obtain an estimate of the minimum sample size to be taken to achieve a representativeness
of the results which is satisfactory for a defined investigation task. Furthermore, the influence of
irradiation and measurement parameters upon the quality of the analytical results were studied. Finally,
the analytical data obtained from IPAA and instrumental neutron activation analysis (INAA),
both carried out in a large-volume mode, were compared. Values within the limits of satisfactory
agreement were found only partially. Analytical process control using on-site X-ray fluorescence
analysis performed during recycling of electronic waste is currently under development.
Activities for the development of reference materials started as early as 1906 at the US National Bureau of Standards (NBS). In 1912, the first iron and steel reference materials were certified for carbon content in Germany by the Royal Prussian Materials Testing Institute MPA, predecessor of BAM, the Federal Institute for Materials Research and Testing.