20%. If the laboratory control sample is not acceptable, then the laboratory control sampleshould be re-run once and, if still unacceptable, all samples after the last acceptable laboratorycontrol sample should be reprepared and reanalyzed.
20%. If the laboratory control sample is not acceptable, then the laboratory control sampleshould be re-run once and, if still unacceptable, all samples after the last acceptable laboratorycontrol sample should be reprepared and reanalyzed.<br>