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2 The use ofhahde aCId should be aVOIded 3 Because ofpossIble chemIcal InteractIOn, mtrogen should not be used as a purge gas 4 For every sample matnx analyzed, venficatIOn IS necessary to determIne that method of standard addItIon IS not reqUIred (see part 52 1 of the AtomIC AbsorptIOn Methods sectIon ofthIS manual) 5 Ifmethod ofstandard addItIOn IS reqUIred, follow the procedure gIven earher In part 8 5 ofthe AtomIC AbsorptIon Methods sectIon ofthIS manual 6 For quahty control reqUIrements and optIOnal recommendatIOns for use In dnnkIng water analyses, see part 10 of the AtomIC AbsorptIOn Methods sectIOn of thIS manual 7 Data to be entered Into STORET must be reported as ug/1 Precision and Accuracy 1. In a SIngle laboratory (EMSL), USIng CInCInnatI, OhIO tap water spIked at concentratIOns of 500 and 1000 ug Ball, the standard deVIatIOns were ±2 5 and ±2 2 ug, respectIvely Recovenes at these levels were 96% and 102%, respectIvely A dIlutIOn of 110 was reqUIred to bnng the spIkes WIthIn the analytICal range of the method 2082-2 I III l'PDF Image | Methods for Chemical Analysis of Water and Wastes
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