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Notes 2 3 4 5 6 1 1he above concentratIOn values and mstrument conditIOns are for a Perkm-Elmer HGA- 2100, based on the use of a 20 ul mJectIOn, contmuous flow purge gas and non-pyrolytlc graphite Smaller size furnace devices or those employmg faster rates of atomization can be operated usmg lower atomizatIOn temperatures for shorter time penods than the above recommended settmgs The use ofbackground correctIOn IS recommended Nitrogen may also be used as the purge gas If chlonde conceptratIOn presents a matnx problem or causes a loss prevIous to atomizatIOn, add an excess of 5 mg of ammOnium nitrate to the furnace and ash usmg a ramp accessory or with mcremental steps untl1 the recommended ashmg temperature IS reached For every sample matnx analyzed, venficatIOn IS necessary to determme that method of standard additIOn IS not reqUlred (see part 5 2 1 of the Atomic AbsorptIOn Methods section of this manual) Ifmethod ofstandard additIOn IS reqUlred, follow the procedure given earher m part 8 5 of the Atomic AbsorptIOn Methods sectIOn ofthls manual Data to be entered mto STORET must be reported as ug/l 1 PrecIsIOn and accuracy data are not aval1able at tills time 7 Precision and Accuracy 2042-2 "PDF Image | Methods for Chemical Analysis of Water and Wastes
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