Laserfiche WebLink
different than those in the ICV, and a readback of the highest calibration <br />standazd. <br />These solutions provide verification that the calibration equations are <br />functioning properly throughout the analytical range of the instrument. During <br />sample analysis dilutions are made for analytes found at concentrations above <br />the highest calibration standard. No results are taken from extrapolations <br />beyond the highest standazd. <br />6. All standards and solutions are NIST traceable and were used within their <br />recommended shelf life. <br />7. The sample was prepazed and analyzed within the established hold times. <br />All in house quality control procedures were followed, as described below. <br />8. General quality control procedures. <br />^ A filter (method) blank and laboratory control sample were filtered and <br />preserved at the same time as the samples for the selenium analysis. A filter <br />(method) blank was filtered and preserved at the same time as the samples for <br />the thallium analysis. There were not more than 20 samples associated with <br />each filtered blank and laboratory control sample. <br />^ The preparation (method) blank associated with each batch was below the <br />practical quantitation limit for each requested analyte. <br />^ The laboratory control sample associated with the selenium batch was within <br />the acceptance limits. This indicates complete digestion according to the <br />method. <br />^ All initial and continuing calibration blanks associated with each analytical <br />batch were below the practical quantitation limits for the requested analytes. <br />^ All initial and continuing calibration verifications associated with each <br />analytical batch were within the acceptance criteria for the requested analytes. <br />This indicates a valid calibration and stable instrument conditions. <br />^ The interference check samples associated with Method 200.8 were analyzed. <br />9. Matrix specific quality control procedures. <br />Sample 0601125-1 was designated as the quality control sample for each analysis. <br />Similarity of matrix and therefore relevance of the QC results should not be <br />automatically inferred for any sample other than the native sample selected for QC. <br />^ A matrix spike and matrix spike duplicate were prepazed and analyzed with <br />each batch. All acceptance criteria for accuracy were met. <br />^ A matrix spike duplicate was prepazed and analyzed with each batch. All <br />acceptance criteria for precision were met. <br />^ A serial dilution was analyzed with each batch. All acceptance criteria were <br />met. <br />