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Methods for Chemical Analysis of Water and Wastes

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Methods for Chemical Analysis of Water and Wastes ( methods-chemical-analysis-water-and-wastes )

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PLA TINUM Method 255.2 (Atomic Absorption, furnace technique) Optimum ConcentratIOn Range: 0 1-2 mgl1 Detection Limit: 0 02 mg/1 Preparation ofStandard SolutIOn 1 2 3 Sample 1 Sample 1 Stock solutIOn Prepare as descnbed under "direct aspiratIOn method" Prepare dIlutIOns of the stock solutIOn to be used as calIbratIOn standards at the time of analysIs These solutIOns are also to be used for "standard additIOns" The calIbratIOn standard should be dIluted to contam 0 5% (vIv) HN03 Preservation For sample handlmg and preservation, see part 4: 1 of the AtomiC AbsorptIOn Methods sectIOn ofthis manual PreparatIOn Prepare as descnbed under "direct aspiratIOn method" Sample solutIOns for analysIs shouldcontamO 5% (v/v)HN03 Instrument Parameters (General) 1 Drymg Time and Temp 30 sec-125°C 2 Ashmg Time and Temp 30sec-1300°C 3 Atomlzmg Time and Temp 10 sec-2800°C 4 Purge Gas Atmosphere Argon 5 Wavelength 265 9 nm 6 Other operatmg parameters should be set as speCified by the particular mstrument manufacturer AnalysIs Procedure 1 For the analysIs procedure and the calculatIOn, see "Furnace Procedure" part 9 3 of the AtomIC Absorption Methods sectIOn 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 mJectIOn, contmuous flow purge gas and pyrolytIc graphite Smaller size furnace deVices or those employmg faster rates of atomizatIOn can *Not ASSigned Approved for NPDES Issued 1978 2552-1 STORET NO. Total*

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