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Notes 1 The above concentratlOn values and mstrument cond1tlOns are for a Perkm-Elmer HGA- 2100, based on the use of a 20 ul mJectlOn, contmuous flow purge gas and non-pyrolytic graph1te Smaller S1ze furnace dev1ces or those employmg faster rates of atom1zatlOn can be operated usmg lower atom1zat10n temperatures for shorter t1me per10ds than the above recommended settmgs 2 The use ofbackground correctlOn 1S recommended 3 N1trogen may also be used as the purge gas 4 Tmanalys1s1Ssens1t1vetochlondeconcentratlOn Ifchlondeconcentrat10npresentsa matnx problem or causes a loss preV10US to atom1zatlOn, add an excess of 5 mg of ammomum mtrate to the furnace and ash usmg a ramp necessary or w1th mcremental stepsuntiltherecommendedashmgtemperature1Sreached Extendedashmgtimeshave been reported to 1mprove preClSlon 5. Foreverysamplematnxanalyzed,venficat10n1Snecessarytodetermmethatmethodof standard add1t10n 1S not reqmred (see part 5 2 1 of the Atom1c Absorption Methods sect10n ofth1s manual) 6 If method of standard add1tion 1S reqmred, follow the procedure g1ven earlter m part 8 5 ofthe Atom1c Absorpt10n Methods sectlOn ofth1s manual 7 Data to be entered mto STORET must be reported as ug/l Precision and Accuracy 1 PreC1S10n and accuracy data are not aval1able at th1s t1me 2822-2PDF Image | Methods for Chemical Analysis of Water and Wastes
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