Laserfiche WebLink
CORE LABORATORIES <br />~ ~l~s~ <br />Western Atlas <br />International <br />~e,o.,.. ~.n.. <br />71TLE <br />ANALYTICAL CHEMISTRY DIVISION QUALITY ASSURANCE MANUAL <br />' ' SOP N0. REVISION ND. EFFECTIVE DATE PAGE <br />LJf _r1Ar` /~7 n „nc,nn -ie _c ~nw <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br />u <br /> <br />1 <br />i <br />1 <br />• Initia{ calibration verification standards must be analyzed prior to field <br />sample analyses. <br />• Continuing calibration verification standards must be 8nalyzed once per <br />batch or at a frequency of 10% of the sample population, whichever is <br />greater. <br />• A method blank and reference standard or stock standard (if availablel must <br />be analyzed with each sample batch. <br />• Laboratory duplicates must be analyzed once per batch or at a frequency <br />of 10% of the sample population, whichever is greater. <br />• Matrix spikes must be analyzed once per batch or at a ffequency of 10% <br />of the sample population, whichever is greater. <br />• Calculate concentrations using linear regression on a scientific calculator. <br />• Correlation coefficient, slope, and Y-intercept values must be calculated <br />and recorded for all standard lines. <br />Instrumental Parameters <br />• Method-specified calibration procedures, frequency repuirements, and <br />acceptance criteria must be followed (see section 12.0). <br />• Manufacturers' equipment guidelines and maintenance sghedules must be <br />followed (see section 12.0). <br />• The correlation coefficient should be > 0.995 for the majority of <br />instrumental parameters. <br />• .Initial calibration blanks must be analyzed prior to field sample analyses. <br />• Continuing calibration blanks must be analyzed once pI#r batch or at a <br />frequency of 10% of the sample population, whichever is greater. <br />• Initial calibration verification standards must 6e analyzed prior to field <br />sample analysis. <br />r <br />