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BARIUM Method 208.2 (Atomic Absorption, furnace technique) OptImum ConcentratIOn Range: DetectIOn LImit: 2 ug/l 10-200 ug/l PreparatIOn of Standard SolutIOn 1 Stock solutlOn Prepare as desCrIbed under "dIrect aspiratlOn method" 2 Prepare dllutlOns of the stock solutlOn to be used as calIbratlOn standards at the time of analySIS ThesesolutlOnsarealsotousedfor"standardaddItions" 3 The cahbratlOn standard should be dlluted to contam 0 5% (vIv) HN03 Sample PreservatIon 1 For sample handlIng and preservatlOn, see part 4 1 of the AtomIC AbsorptlOn Methods sectlOn OfthiS manual Sample PreparatIon 1 Prepare as desCrIbed under "dl,fect aspiratlOn method" Sample solutlOns for analySIS shouldcontamO 5% (v/v)HN03 Instrument Parameters (General) 1 Drymg TIme and Temp 30sec-125°C 2 Ashmg TIme and Temp 30sec-1200°C 3 AtomIzmg TIme and Temp 10 sec-28oo°C 4 Purge Gas Atmosphere Argon 5 Wavelength 553 6 nm 6 Other operatmg parameters should be set as speCIfied by the partIcular mstrument manufacturer AnalYSIS Procedure 1 For the analySIS procedure and the calculatlOn, see "Furnace Procedure" part 9 3 of the AtomIC AbsorptlOn Methods sectlOn of thIS manual Notes 1 The above concentration values and mstrument condItions are for a Perkm-Elmer HGA- 2100, based on the use of a 20 ul mJectlOn, contmuous flow purge gas and pyrolytic graphIte Approved for NPDES and SDWA Issued 1978 2082-1 STORET NO. 01007 Dissolved 01005 Suspended 01006PDF Image | Methods for Chemical Analysis of Water and Wastes
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