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~ %/1- <br />Wastarn Atlas <br />International <br />..,,o.... f.A., <br />CORE LABORATORIES <br />ANALYT{CAL CHEMISTRY DIVISION QUALITY ASSURANCE MANUAL <br />SOP N0. REVISION N0. EFFECTIVE GATE PAGE <br />HC-QAC-02 0 1/06/92 64 of 104 <br />12.0 INSTRUMENT AND ANALYTICAL PROCEDURES <br />' 12.1 Instrument Calibration <br /> Instruments should be calibrated according to their manufacturer's <br />1 instructions and the method specifications. General guidelines are listed <br /> below. <br /> General Guidelines <br />' In general, a minimum of three standards at different concentrations and a <br />blank should be used for most initial calibrations and standard lines. <br /> However, some instruments require asingle-point calibration and certain <br />' methods require that additional standards be used. Reference the specific <br />method for calibration requirements <br /> . <br /> The initial calibration should be verified by a reference standard and a <br />' calibration blank before analyzing samples. <br /> Continuing calibration is verified according to the applicable method. <br />' Guidelines are provided in sections 13.2 and 13.3. <br />' 12.2 Instrument Maintenance and Repair <br /> Routine instrument maintenance shall be performed according to the <br />' manufacturer's specifications only by a person who is f$miliar with the <br /> instrument. <br />' Instrument repair should be done only by qualified personnel or a <br /> manufacturer representative. <br /> When required, maintenance and repair contracts shall be used for specific <br /> instrumentation . ~ <br /> All maintenance and repair events should be documented in a maintenance log <br /> for each instrument. <br />' 12.3 Analytical Method Requirements <br />1 <br />