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Notes 2 3 4 5 6 7 8 1 The above con\.entratlon values and Instrument conditions are for a Perkin-Elmer HGA- 2100, based on the use of a 20 ul inJectiOn, continUOUS flow purge gas and non-pyrolytlc graphite Smaller size furnace devices or those employing faster rates of atomizatiOn can be operated USing lower atomization temperatures for shorter time penods than the above recommended settings Background correctiOn may be reqUIred If the sample containS high dissolved sohds The use ofhahde aCids should be aVOIded Ifadsorption to container walls or formatiOn ofAgClls suspected, see NOTE 3 under the Direct AspiratiOn Method 272 1 For every sample matnx analyzed, venficatIOn IS necessary to determine that method of standard additiOn IS not reqUIred (see part 5 2 1 of the AtomiC AbsorptIOn Methods section of this manual) 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 If method of standard addition IS reqUIred, follow the procedure given earher In part 8 5 of the AtomiC AbsorptIOn Methods sectIOn of this manual 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 25, 50, and 75 ug A g/l, the standard deViatIOns were ±O 4, ±O 7, and +09, respectively Recovenes at these levels were 94%, 100% and 104%, respectively 272 2-2 I, , IPDF Image | Methods for Chemical Analysis of Water and Wastes
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