Laserfiche WebLink
t <br />~~~~~ COAE LABORiATOR1ES <br />' Western Asles <br />Int0r rational <br />o..r csw,., <br />' TiTiE <br />ANALYTICAL CHEMISTRY DIVISION QUALITY ASSURANCE MANUAL <br />' SDP NO. REVISION N0. EFFECTIVE DATE PAGE <br />HC-QAC-02 0 1!06192 75 of 104 <br />' Analyzed value must be ± the method detection limit or applicable reporting <br />limit. <br />' Initial/Continuing Calibration Verification Standards <br />' At a minimum, calibration verification standards must be analyzed once prior <br /> to sample analysis and again at the completion of sample analysis. For larger <br />' sample batches, analyze continuing calibration standards at a frequency of <br />10% of the sample population <br /> . <br />' The analyzed recovery value for calibration verification standards must be <br />within 90-110% of the known value <br /> . <br /> The correlation coefficient for calibration curves should be ? 0.995 for the <br /> majority of inorganic analysis. <br /> Laboratorv Duplicates <br /> Laboratory duplicates (matrix duplicates) must be analyzed omce per batch of <br /> samples or at a frequency of 10% of the sample population, whichever is <br />' greater (sample volume permitting). <br />' Where the analyzed value is <_ 5 times the method detection limit, duplicated, <br /> values must agree within t the applicable reporting limit. <br />' Where the analyzed value is > 5 times the method detection limit, duplicate <br /> value must agree within s 20% of the relative percent difference. <br />' Matrix Spikes <br />' Matrix spikes (where applicable) must be analyzed once per batch of samples <br />or at a frequency of 5°!0 of the sample population, whichever is greater li.e., <br /> 1-20 samples, 1 spike; 20-40 samples, 2 spikes, etc.). Certain parameters <br /> require matrix spikes at a frequency of 10%. <br /> The analyzed recovery value must be within 75-125% of the known value. <br />' Reference/LCS Standards <br /> <br />