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1 2 Sample 1 Sample 1 Stock SolutIOn Carefully weIgh 1 599 g of lead nItrate, Pb(N03)2 (analytical reagent grade), and dIssolve In deIOnIZed dIstilled water When solutIOn IS complete aCIdIfy wIth 10mlredIstIlledHN03 anddIluteto 1lIterwIthdeIOnIZeddIstIlledwater 1ml = 1mg Pb (1000 mg/l) Prepare dIlutIOns of the stock solutIOn to be used as calIbratIon standards at the tIme of analysIs The calIbratIOn 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 processIng Preservation For sample handlIng and preservation, see part 4 1 of the AtomIC AbsorptIOn Methods sectIOn OfthiS 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 ofthIS manual have been found to be satisfactory LEAD Method 239.1 (Atomic Absorption, direct aspiration) Optimum Concentration Range: SensItivIty: 0 5mg/l Detection LImit: 0 1mg/l Preparation of Standard Solution STORET NO. Total 01051 Dissolved 01049 Suspended 01050 1-20 mg/l USIng a wavelength of283 3 nm Instrumental Parameters (General) 1 Lead hollow cathode lamp 2 Wavelength 2833 nm 3 Fuel Acetylene 4 OXIdant AIr 5 Type offlame OXIdIZIng AnalYSIS Procedure 1 For analysIs procedure and calculatIOn, see "DIrect AspIratIOn", part 9 1 of the AtomIC AbsorptIOn Methods sectIOn of thIS manual Approved for NPDES and SDWA Issued 1971 EdItorIal reVISIon 1974 and 1978 239 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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