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1 2 3 Sample 1 Sample 1 Stock SolutIOn Carefully weIgh 1000 gram of alumInum metal (analytical reagent grade) Add15mlofconc Heland5mlconc HN03 tothemetal,coverthebeakerand warmgently WhensolutIOnIScomplete,transferquantItatIvelytoa1lItervolumetnc flask and make up to volume With deIOnIZed dIstIlled water 1 ml = I mg Al (1000 mg/l) PotaSSIUm Chlonde SolutIOn DIssolve 95 g potaSSIUm chlonde (KCI) In deIomzed dIstl1led water and make up to 1 hter Prepare dl1utIOns of the stock SolutIon to be used as cahbratIOn standards at the tIme of analySIS The cahbratIOn standards should be prepared USIng the same type ofaCId and at the same concentratIOn as will result In the sample to be analyzed eIther dIrectly or after processmg To each 100 ml of standard and sample ahke add 2 0 ml potaSSIUm chlonde solutIOn PreservatIon For sample handhng and preservatIon, see part 4.1 of the AtomIC AbsorptIOn Methods sectIOn ofthIs manual PreparatIon The procedures for the preparatIOn of the sample as gIven In part 4 1 1 through 4 1 4 of the AtomIC AbsorptIOn Methods sectIOn of thIS manual have been found to be satIsfactory ALUMINUM Method 202.1 (Atomic Absorption, direct aspiration) Optimum Concentration Range: SensitiVIty: 1 m g / l Detection LImit 0 1mg/l Preparation of Standard Solution STORET NO. Total 01105 Dissolved 01106 Suspended 01107 5-50 mg/l USIng a wavelength of309 3 nm Instrumental Parameters (General) 1 AlumInum hollow cathode lamp 2 Wavelength 3093 nm 3 Fuel Acetylene 4 OXIdant NItroUS OXIde Approved for NPDES Issued 1971 Editonal reVISIon 1974 and 1978 202.1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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