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Methods for Chemical Analysis of Water and Wastes

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Methods for Chemical Analysis of Water and Wastes ( methods-chemical-analysis-water-and-wastes )

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Notes 1 The above concentratlOn values and Instrument condItions are for a PerkIn-Elmer HGA- 2100, based on the use of a 20 ul InJectlOn, continuous flow purge gas and non-pyrolytic IIIII graphIte Smaller SIze furnace deVIces or those employing faster rates of atomizatlOn can be operated uSing lower atomIzatIon temperatures for shorter tIme penods than the above recommended settings 2 TheuseofbackgroundcorrectlOnISrecommended 3. ContaminatIon from the work area IS cntIcal In cadmIUm analysIs Use of pIpet tIpS JIIIr'l whIch are free of cadmIUm IS of particular Importance (See part 529 of the AtomIC AbsorptIon Methods sectIon ofthIs m a n u a l ) ' I 4 For every sample matnx analyzed, venficatlOn IS necessary to determine that method of standard addItIon IS not reqUIred (see part 5 2 1 of the AtomIC AbsorptIon Methods sectlOn ofthIS manual) 5 Ifmethod ofstandard addItIon IS reqUIred, follow the procedure gIven earlIer In part 8 5 ofthe AtomIC AbsorptIon Methods sectIon ofthIS ~anual 6 For qualIty control reqUIrements and optlOnal recommendatlOns for use In drInkIng water analyses, see part 10 ofthe AtomIC AbsorptIon Methods sectIOn ofthIS manual 7 Data to be entered Into STORET must be reported as ug/l Precision and Accuracy 1 In a Single laboratory (EMSL), USIng CinCInnatI, OhIO tap water spIked at concentratIons of 2 5, 50 and 100 ug Cd/I, the standard deVIatIons were ±O 10, ±O 16 and ±O 33, respectIvely Recovenes at these levels were 96%,99% and 98%, respectIvely 2132-2

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