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6.2 QA/QC MEASURES, REFERENCE MATERIALS
e importance of achieving laboratory accreditation under ISO 17025 (ISO
1999), which is the implementation of quality assurance (QA) in a laboratory,
is growing in time. Quality assurance is dened (Taylor 1981, 1987; Taylor and
Oppermann 1986; ISO 1987) as a system of activities whose purpose is to pro-
vide the producer or user of a product or service with the assurance that it
meets dened standards of quality with a stated level of condence. QA deals
with the approach of the whole organization and it spreads over the details of
personnel, documents, and facilities involved in the service. e small part of
the QA that deals with the process itself is called qua ...