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:.a , ar..: - •zzr -�: .a•. .ts . <br /> r5�o... <br /> w <br />�h <br /> y � <br /> i <br /> 7 ' <br /> BATCH QC IZ"oIZ,,,: lleltnttions and 'rernls f <br /> Accuracy The ability of a procedure to determine the"t[t[e"concentration of an analYte <br /> demagrecule <br /> Precision 'I't[e reproitb oil cit4 cr duplic'atcsrocedure �oftthectnZe tsampic ora[palir of <br /> een <br /> analyses performed <br /> duplicate spikes <br /> Batch <br /> A group of samples analyzed sec}ucntially using the sak1�e calibration curve, <br /> reagents,and instrument <br /> Laboratory Laboratory reagent water spiked with known comp <br /> ounds and subjected to the <br /> Control Standard same procedures� nciebccause LCS thu <br /> e it sles l prepared from ta diffe double source k dtethan le <br /> (LCS) analytical met <br /> standard used to calibrate the instn[rnent,it alsa serves is <br /> calibration <br /> cs, For <br /> Matrix QC anic <br /> Quality control tests perfos ds a pa�tr of duplica c samtual ples and a spiked sost ample. <br /> analyses,the laboratory <br /> For most Organic analyses,the laboratory uses a pair of spiked sa[np es <br /> (duplicate spikes) <br /> LC Result Laboratory result of an LCS analysis <br /> LT Result Expected result,or true value,of the LCS an"sample,with <br /> }Z} R2 Result: Result of the allq <br /> of this of ree sample and R2 iicate ts corresponding duplicuots of :R 1 us d to <br /> the <br /> First analysis <br /> determine preC151an <br /> Result of the analysis of replicate spiked aliquots,with S 1 indicating one <br /> Resu <br /> SI, S2 Result Renu the second spike;used to determine precision and <br /> spike(if the sample and Se <br /> accuracy <br /> R Isar Result The average of replicate analysis results <br /> S gar Result: The average of spike analysis results <br /> The theoretical,or expected,result of a spike sa <br /> Tnre Value <br /> mple analysis <br /> The percentage of analyte recovered. is: LC' LT x 14t) <br /> Recovery For LCS,the percent recovery calculation <br /> Percent <br /> For spike recoveries,the percent recovery calculatiion is: <br /> S liar-Sam le Concentration) x 100 <br /> Spike Amount <br /> Relative Percent Calculatedusing R2 ex i�� following' <br /> (RPD) (R} *R2) (S! +S2) 2 <br /> at is <br /> k Result The result of the analysis of amethod tbl yen which is <br /> dttres as theent water hsampies <br /> -- ---------- ------... — -._.._.__.Blau _..... ---._..— <br /> analysed using-the-same.rcag .----.>.-------�ontamrnation <br /> in a batch;used to determine laboratory ' <br /> Re orting Detec BCA-assign ed limit based on—buidoittles Same ns—method detection}imits <br /> p MDLs)determined using EPA g <br /> tion Limit(RDL) ( 11!:.irmlyrirref <br />