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M'S �M <br /> moo _ .,i <br /> _. ti v <br /> MIM W- <br /> i�i <br /> e- <br /> ,ve <br /> I,N <br /> BROWN AND CALDWELL ANALYTICAL LABORATORIES <br /> BATCH QC REPORT <br /> Definitions and Terms <br /> Aor .ncr. The ability of a procedum to determine the'ftw°oanceanstion of an <br /> Ba6rlr A group of samples analyzed sequentially using the same cahbra on curve, <br /> reagents,and instrumM <br /> w. <br /> . LabmaLory Ccstnl Laboratory reagent water sp9wd w&known eons and subjected <br /> Standard(LCS): to the same proowkrres as the samples. The LCS thus indicates the acc uuq <br /> f of the analytical method and,because it is prepared from a different source <br /> than the standard used to calr�ate the hnxrument,it also serves to double- <br /> check the aeration. <br /> LC Result: Laboratory result of an LCS analysis. <br /> 1:1-Result: Expected result,or true value,of the LCS analyte. <br /> Matrix QC: Quality control tests performed on antral cheat samples. For most inorganic <br /> analyses,the laboratory uses a patr of duplicate samples and a spiked <br /> ,. sample, Formost organic analyses,the laboratory urea a pair of spiked samples(duphww sp*es). <br /> Percent Recavrty: The percentage of analyte reoavered. <br /> For LCS,the percent recovery calculation is <br /> LC LT x 100. <br /> For spikerecaverbts,the percent recovery caleulaWon is <br /> , {S Bar- tg C�ntrabrml a l oo <br /> Spike Amount _ <br /> „wl 1'�re on 'lire reprodudI ty of a procedure demonstrated by the agreement betweesr <br /> analyses performed on either duplicates of the same sample or a pair of <br /> duplicate spires. <br /> RI,R2 Result Result of the anal of replicate aliquots of a <br /> E ]'� reP� sample,with RI incbicating <br /> the first analysis of the sample and R2 its corresponding duplicate;used to <br /> €' determine precision. <br /> Relative Percent Calculated using one of the following: <br /> Difference(RPD): <br /> tr. <br /> (RI__i Z a 100 aL_*ZXJM <br /> (RI +R2)-2 (S1+S2)-2 <br /> -- ---- --- z - S Bar Result: The average of Spike am alyals results. - -- -- --- <br /> 1 :.. <br /> =. <br /> S1, S2 Result Result of the analyslit of replicate spiked aliquots,with Sl indicating one <br /> spike of the sample and S2 the second spike;used to determirne pin <br /> and accuracy: <br /> Tare vabue. The theoretical,or expected,result of a spike sample analysis. <br /> �„ fi C:1 nnlrrernl <br /> INS MIIM��Mww I WHIM <br />