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SODIUM Method 273.1 (AtomIC Absorption, direct aspiration) Optimum ConcentratIOn Range SensItivIty 0015 mg/1 Detection LImIt 0 002 mg/1 STORET NO. Total 00929 DIssolved 00930 Suspended 00928 003-1 mg/1 usmg a wavelength of589 6 nm PreparatIOn of Standard SolutIOns 1 Stock SolutIOn Dissolve 2 542 g of NaCl (analytical reagent grade), dned at 140°C, m deIOnIzed distilled water and make up to 1 hter 1011 = 1 mg Na (1000 mg/1) 2 Prepare dilutIOns of the stock solutIOn to be used as cahbratIOn standards at the time of analySIS The cahbratIOn standards should be prepared usmg the same type of aCId and at the same concentratIOn as wIll result m the sample to be analyzed either directly or after processmg Sample PreservatIOn 1 For sample handlmg and preservatIOn, see part 4 1 of the AtomIc Absorption Method., sectIOn of thIS manual Sample Preparation 1 For the analySIS of total sodmm m domestic and mdustnal effluents, the procedures for the determmatIOn of total metals as gIven m parts 4 1 3 and 4 1 4 of the Atomll AbsorptIOn Methods sectIOn of this manual have been found to be satisfactory 2 For ambient waters, a representattve ahquot of a well-mIxed sample may be used directly for analySIS If suspended sohds are present III suffiCIent amounts to clog the nebuhzer, the sample may be allowed to settle and the supernatant hqUld analyzed dIrectly Instrumental Parameters (General) 1 Sodmm hollow cathode lamp 2 Wavelength 589 6 nm 3 Fuel Acetylene 4 OXIdant A i r 5 Type of flame Approved for NPDES Issued 1971 Editonal revIsion 1974 OXldlzmg 273 I-IPDF Image | Methods for Chemical Analysis of Water and Wastes
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