Substitute CRMs for Quality Control Purposes with In-House QCM

摘要

The Southern Area Laboratories Division (SALD) is accredited the ISO/IEC 17025 and is currently implementing a QA/QC program in all Units as part of the Laboratories quality management to monitor and validating of tests results. Results of quality control analysis are aimed to provide clear and fast information for the Acceptance of analytical results obtained on a batch of test samples. Continuous use of control Material allows estimation of the stability of performance of the instrument, including calibration, Analytical procedure, analyst, and influence of environmental conditions. Matrix is one of most common interference that effect choosing appropriate QA. The certified reference material (CRM) is not available at all (matching neither matrix nor measured), in additional to that the CRM is too costly to be used for quality control of a larger number of analytical test runs. For that reason we conducted a study for the water samples collected from the different locations in the field for geo- chemical studies over a period of times to prepare QC for geo-chemical analysis.