Quality control standard definition
Quality control standard or “QCS” means a solution or sample containing method analyte of known concentration, accompanied by specified analytical acceptance limits, and obtained from a source external to the laboratory and different from the source of calibration standards. These samples are dis- tinguished from proficiency test samples in that the acceptance limits are provided with the sample, rather than after analysis. Quality control standards are used to check either laboratory or instrument performance.
Quality control standard means a standard under which a wholesaler determines whether beer is marketable due to product deterioration or due to improper packaging or handling by the manufacturer or wholesaler.