ARCHIVED REPORTS XR0000150 - Laserfiche WebLink

Home Browse Search

o ICRP Systems 4 The inductively coupled argon plasma systems are calibrated daily by an external standard calibration process. Specific methods may impose variations and/or different acceptance criteria upon this calibration. These specific requirements are found in the CHCMUCST SCP covering the particular method in question. o Daily Cxternal Standard Calibration Procedure: For each analyte, or group of analytes, to be analyzed, initial calibration standards are prepared by adding aliquots of one or more stock standards to volumetric flasks and diluting to volume with an appropriate solvent. These standards should be at concentrations that define the maximun range of the method. Continuing calibration standards, containing the sane analytets> as the calibration standards, are prepared in the same manner, but at approximately SOX of 1 the calibration standard concentrations . The appropriate initial calibration standard, followed by an appropriate blank solution, arc introduced into the xCnp system in duplicate using the technique used for the introduction of actual aamples . The ICRF system calculates a response factor based on the sytem response to both the standard and blank . This is followed by duplicate introductions of the appropriate continuing calibration standard . The continuing calibration standard is analyzed after every ten samples . o Results from the duplicates of each sample or standard must have a percent relative standard deuiation (XRSO) less than or equal to 20X. o If this criteria is not net, the sample Or standard analysis must be repeated . o Results from the continuing calibration standards must fall within f/- 13X of the expected value . o If this criteria is not net, the standard analysis must be repeated . o If the standard still does not meet the criteria, the entire standardization procedure is repeated . �i 21