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GOLD Method 231.2 (Atomic Absorption, furnace technique) STORET NO. 71910 OptImum Concentration Range: 5-100 ug/l DetectIon Limit: 1 ug/l Preparation of Standard SolutIOn 1 Stock solutiOn Prepare as descnbed under "direct aSpiratiOn method" 2 Prepare ddutiOns of the stock solutiOn to be used as cahbratlOn standards at the time of analysIs These solutiOns are also to be used for "standard additiOns" 3 The cahbratiOn standard should be dduted to contam 05% (v/v) HN03 Sample PreservatIon 1 For sample handhng and preservatiOn, see part 4 1 of the AtomiC AbsorptiOn Methods sectiOn ofthis manual Sample PreparatIon 1 Prepare as descnbed under "direct aspiratiOn method" Sample solutiOns for analysIs should contam 0 5% (vIv) HN03 Instrument Parameters (General) 1 Drymg Time and Temp 30 sec-125°C 2 Ashmg Time and Temp 30 sec-600°C 3 Atomlzmg Time and Temp 10 sec-2700°C 4 Purge Gas Atmosphere Argon 5 Wavelength 242 8 nm 6 Other operatmg parameters should be set as speCified by the partlCular mstrument manufacturer Analysis Procedure 1 For the analysIs procedure and the calculatiOn, see "Furnace Procedure" part 9 3 of the AtomiC AbsorptiOn Methods sectiOn of his manual Notes 1 The 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 Approved for NPDES Issued 1978 231 2-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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