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RUTHENIUM "t Method 267.1 (Atomic ,Absorption, direct aspiration) STORET NO. Total* OptimumConcentratIOnRange: I-50mg/l usmgawavelengthof349 9um _Sensitivity: 0 5 mg/l Detection Limit: 0 2 mg/l Preparation ofStandard Solution I StockSolutlOn DIssolve02052gofruthemumchlonde,RuCI3, mammimumvolumeof 20% (vIv) HCI and dIlute to 100 ml wIth 20% HCI (1 ml = 1mg Ru) 2 Prepare dIlutlOns of the stock SolutlOU to be used as calIbratlOn standards at the tIme of analysIs The calIbratlOn standards should be prepared usmg I % (vIv) HCI Sample Preservation 1 For sample handlIng and preservatlOn, see part 4 1 of the AtomIC AbsorptlOn Methods sectlOn of thIS manual Sample PreparatIOn 1 Transfer a representative 100 ml alIquot of the well mIxed sample to a Gnffin beaker and add 2 ml of dIstIlled (1 1) HCI Place the beaker on a steam bath or hot plate and warm at 95°C for 15 mmutes Cool the beaker and filter the sample to remove msoluble matenal that could clog the atomIzer Adjust the volume back to 100 ml The sample IS now ready for analysIs Instrumental Parameters (General) 1 Ruthemum hollow cathode lamp 2 Wavelength 349 9 nm 3 Fuel Acetylene 4 OXIdant AIr 5 Typeofflame OXIdIzmg AnalYSIS Procedure 1 For the analysIs procedure and the calculatIon, see "DIrect AspiratlOn", part 9 1 of the AtomIC AbsorptlOn Methods sectlOn of thIS manual *Not ASSIgned Approved for NPDES Issued 1976 Techmcal reVlSlon 1978 267 1-1PDF Image | Methods for Chemical Analysis of Water and Wastes
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