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Serial Dilution % Difference Statement <br /> The serial dilution is used to assess matrix suppression or enhancement. Raw element <br /> concentrations that are 25X the IDL/MDL for CVAA, 50X the IDL/MDL for ICP, and 100X the <br /> IDL/MDL for ICP-MS analyses are applicable for serial dilution assessment. All applicable <br /> analytes met the acceptance criteria of less than 10% difference (%D). <br /> Matrix Spike Duplicate (MSD) Recovery Statement <br /> The percent recovery (%R) obtained from the MSD analyses are evaluated when the sample <br /> concentration is less than four time (4X) the spike concentration added. All applicable elements <br /> met the acceptance criteria. <br /> MS/MSD Relative Percent Difference (RPD) Statement <br /> The RPD(s)between the MS and MSD met the acceptance limits. <br /> Technical Information <br /> Holding Time Specifications <br /> GEL assigns holding times based on the associated methodology, which assigns the date and <br /> time from sample collection of sample receipt. Those holding times expressed in hours are <br /> calculated in the A1phaLIMS system. Those holding times expressed as days expire at midnight <br /> on the day of expiration. All samples in this SDG met the specified holding time. <br /> Preparation/Analytical Method Verification <br /> All procedures were performed as stated in the SOP. <br /> Sample Dilutions <br /> Dilutions are performed to minimize matrix interferences resulting from elevated mineral <br /> element concentrations present in solid samples and/or to bring over range target analyte <br /> concentrations into the linear calibration range of the instrument. Samples 334116001, <br /> 334116002, and were diluted in order to bring raw values of sodium within the linear range of <br /> the instrument, and for the analyte potassium that sodium interferes with, in order to ensure that <br /> the inter-element correction factors were valid. <br /> Preparation Information <br /> The samples in this SDG were prepared exactly according to the cited SOP. <br /> Miscellaneous Information <br /> Electronic Packaging Comment <br /> This data package was generated using an electronic data processing program referred to as <br /> virtual packaging. In an effort to increase quality and efficiency, the laboratory has developed <br /> systems to generate all data packages electronically. The following change from traditional <br /> packages should be noted: <br /> Analyst/peer reviewer initials and dates are not present on the electronic data files. Presently, all <br /> initials and dates are present on the original raw data. These hard copies are temporarily stored in <br /> Page 21 of 99 <br />