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1 2 Sample 1 Sample 1 Stock SolutIOn DIssolve 4 953 g of nIckel nItrate, NI(N03)2-6H20 (analytical reagent grade) m deIOnIzed wstI1led water Add 10 ml of conc nItnc aCId and dIlute to 1 lIter WIth deIOnIzed dIstIlled water 1 ml = I mg NI (1000 mg/1) Prepare dIlutIOns of the stock nIckel solutIOn to be used as calIbratIOn standards at the tIme of analySIS The calIbratIOn standards should be prepared usmg the same type of aCId and at the same concentratIOn as wIll result m the sample to be analyzed eIther dIrectly or after processmg 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 m parts 4 1 1 thru 4 1 4 of the AtomIC AbsorptIOn Methods section of thIS manual have been found to be satisfactory NICKEL Method 249.1 (Atomic Absorption, direct aspiration)> Optimum ConcentratIon Range: SensItivity. Q 15 mg/1 DetectIOn LImIt: 0 04 mg/1 PreparatIOn of Standard SolutIon STORET NO. Total 01067 Dissolved 01065 Suspended 01066 03-5 mg/1 usmg a wavelength of232 0 nm Instrumentnl Parameters (General) 1 NIckel hollow cathode lamp 2 Wavelength 232 Qnm 3, Fuel Acetylene 4 OXIdant AIr 5 Type ofFlame OXIdIzmg 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 Issued 1974 Editonal reVISIon 1978 249 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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