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1 2 Sample 1 Sample 1 Stock Solution Dissolve 1 303 g ofthalhum mtrate, TINOJ (analytical reagent grade) In delOmzed distilled water Add 10 ml of conc mtnc aCid and dtlute to 1 hter with delOmzed distilled water 1ml = 1mgTl (1000 mg/l) Prepare dilutIOns of the stock thallIum solutIOn to be used as cahbratton standards at the timeofanalySIS ThecahbratIonstandardsshouldbepreparedUSingmtncaCidandatthe c;ame concentratIOn as Will result In the sample to be analyzed either directly or after proceC;C;Ing Preservation For sample handhng and preservation, see part 4 1 of the AtomiC Absorptton Methods c;ectlOn of this manual PreparatIOn The procedures for preparatIOn of the sample as given In parts 4 1 1 thru 4 1 4 of the AtomiC Absorption Methods sectIOn of thiS manual have been found to be satisfactory If HellS omitted THALLIUM Method 279.1 (Atomic Absorption, direct aspiration) Optimum ConcentratIOn Range. SensItivity' 0 5 mg/l DetectIOn Limit. 0 1 mg/l Preparation of Standal d SolutIOn STORET NO. Total 01059 DIssolved 01057 Suspended 01058 1-20 mg/l USing a wavelength of276 8 nm Instrumental Parameters (General) 1 Thalhum hollow cathode lamp 2 Wavelength 276 8 nm 3 Fuel Acetylene 4 OXidant Air 5 Typeofflame OXidiZing Approved for NPDES Issued 1974 Techmcal reVlSlon 1978 279 I-IPDF Image | Methods for Chemical Analysis of Water and Wastes
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