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Every day measurements are carried out in order to implement regulations (e.g. to decide whether food is suitable for consumption or if water is too polluted to be used as drinking water) or to make other decisions (e.g. toxic element concentration in blood, too low a concentration of essential elements in serum). Moreover, with Europe 1993 and the ratification of the Maastricht Treaty by most EC countries, it is clear that measurements performed in one European country must be accepted by the other European countries. In order to achieve comparability, the following requirements need to be fulfilled: (i) all results of (environmental) measurements should be expressed in the SI unit for amount of substance, the mole; (ii) their traceability to a common base or to the mole, should be ensured; (iii) their real performance should be assessed through regular participation in external quality assessment programmes using undisclosed, real-life samples.

Additional information

Bibliographic Reference: Paper presented: GMP GLP ISO 9000, The Analytical Chemist in the Regulated Laboratory, Basel (CH), October 21-22, 1993
Availability: Available from (1) as Paper EN 37896 ORA
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