Quality Control Trial in a Screening Laboratory
The International Federation of Clinical Chemistry (IFCC) defines quality control (QC) as the study of those errors that are the responsibility of the laboratory and the procedures used to recognize and minimize them (Büttner et al. 1976, 1978). Internal QC is performed within a laboratory while external QC involves several laboratories analyzing the same specimen. In Switzerland external quality control is done to a certain extent for the TSH measurements (exchange of samples between the screening laboratories), internal quality control by repetitive determination of samples on several days.
KeywordsMethionine Leucine Hunt Phenylalanine
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