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POT ASSIUM Method 258.1 (Atomic Absorption, direct aspiration) OptImum ConcentratIOn Range: SensItivIty: 004 mg!1 Detection LImIt: 0 01 mg!l Preparation of Standard SolutIOn STORET NO. Total 00937 Dissolved 00935 Suspended 00936 0 1-2 mg!1 USIng a wavelength of766 5 nm Stock SolutlOn DIssolve 01907 g of KCI (analytIcal reagent grade), dned at 110°C, In delOnIzed dlstllied water and make up to 1 hter I ml = 0 10 mg K (100 mg!l) Prepare dllutlOns of the stock solutlOn to be used as cahbratlOn standards at the tIme of analysIs ThecahbratlOnstandardsshouldbepreparedUSIngthesametypeofaCIdandat the same concentratlOn as wIll result In the sample to be analyzed eIther dIrectly or after processmg Preservation For sample handhng and preservatlOn, see part 4 I of the Atomlc AbsorptIon Methods sectlOn ofthIS manual Preparation For the analysIs of total potassmm m domestIc and mdustnal effluents, the procedures for the determInatlOn of total metals as gtven m parts 4 1 3 and 4 1 4 of the AtomIC AbsorptlOn Methods sectlOn of thIS manual have been found to be satIsfactory For ambIent waters, a representatIve ahquot of a well mIxed sample may also be used dIrectly for analysIs Ifsuspended sohds are present In sufficIent amounts to clog the nebuhzer, the sample may be allowed to settle and the supernatant hqmd analyzed dIrectly Instrumental Parameters (General) 1 Potassmm hollow cathode lamp 2 Wavelength 7665 nm 3 Fuel Acetylene 4 OXIdant AIr 5 Type offlame Approved for NPDES Issued 1971 Edltonal reVlSlOn 1974 1 2 Sample 1 Sample 1 2 Shghtly oXldlzmg 258 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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