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1 2 Sample 1 Sample 1 Stock SolutiOn Carefully weigh 2 282 g of cadmIUm sulfate (3CdS04-8H20, analytical reagent grade) and dIssolve In deIOnized dIStilled water make up to I liter with deIOnized dIstIlled water I ml = 1 mg Cd (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 usmg 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 prepanttion of the sample as given m parts 4 1 1 through 4 1 4 of the AtomIC AbsorptiOn Methods sectIon ofthIs manual have been found to be satIsfactory CADMIUM Method 213.1 (Atomic Absorption, direct aspiration) Optimum Concentration Range: SensItivity: 0 025 mg!1 Detection Limit. 0 005 mg!1 Preparation of Standard SolutIOn STORET NO. Total 01027 Dissolved 01025 Suspended 01026 005-2 mg!1 usmg a wavelength of228 8 nm Instrumental Parameters (General) 1 CadmIUm hollow cathode lamp 2 Wavelength 2288 nm 3 Fuel Acetylene 4 OXIdant AIr 5 Typeofflame OXIdIZIng AnalYSIS Procedure 1 For analySIS procedure and calculatIon, see "DIrect ASpIratiOn", part 9 1 of the AtomIC AbsorptIon Methods sectIon ofthIS manual Approved for NPDES and SDWA Issued 1971 EdItorIal reVISiOn 1974 213 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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