Laserfiche WebLink
rRWX 1210M, <br /> VA r: <br /> S' <br /> BATCH QC: REPORT: Defitiitions and 'Perms ' Sir <br /> Accuracy 'llie ability of a procedure to deternhie the"true"concentration of ata analyte <br /> Precision 'Ilia reproducibility of a procedure dctnonstra,,-_' by the agreement between <br /> analyses performed on citlie.duplicates of the smile sample or a pair of <br /> duplicate spikes <br /> Batch A group of samples analyzed sequentially using the same calibration curve, <br /> reagents,and instrument <br /> Laboratory Laboratory reagent water spiked with known compounds and subjected to die <br /> Control Standard same procedures as the swriptcs. The LCS thus indicates the accuracy of die <br /> (LCS) analytical method and,because it is prepared from a different source than the <br /> standard used to calibrate die instrument,it also serves to double-check the <br /> calibration <br /> Matrix QC Quality control tests performed on actual client samples. For most itiorganic <br /> analyses,the laboratory uses a pair of duplicate samples and a spiked sample. <br /> For most organic analyses,die laboratory uses a pair of spiked samples <br /> (duplicate hpikes) <br /> LC Result Laboratory result of an LCS a ialysis <br /> 1.7 Result Expected result,or true value,of die LCS analysis <br /> RI,R2 Result: Result of die analysis of replicate aliquots of a sample,with R1 indicatvkg the <br /> first analysis of die sample and R2 its corresponding duplicate; used to <br /> determine precision <br /> S1,S2 Result Result of the analysis of replicate spiked aliquots,with S1 indicating one <br /> spike of the sample and S2 the second spike;used to determine precision and <br /> accuracy <br /> R Dar Result The average of replicate analysis results <br /> S Dar Result: The average of spike anaiysis results <br /> 'Prue value Tlic theoretical,or expected,result of a spike sample analysis <br /> Percent 'llic percentage of analyte recovered. <br /> Recovery For LCS,the percent recovery calculation is: LC+LT x 100 <br /> For spike recoveries,the pei-ocnt recovery calculatiion is: <br /> S Bar-Sara ile 'nncentration) x 1CJ <br /> Spike Amount <br /> Relative Percent Calculated using one of the following: <br /> Difference(IZPD) r�-1� J_z,_14 I �2 x <br /> (RI +IU)+2 (51 +S2)+2 <br /> Blank Result Ilia result of the analysis of a method bimtk,which is reagent water that is <br /> analysed using the same reagents,instruments and procedures as the samples <br /> in a batch;used to determine laboratory contamination <br /> Reporting Detec- BCA-assigned limit based on—but not the same as—method detection limits <br /> tion Limit(RDL) (MDLs)determined using EPA guidelines <br /> IN <br />