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CADMIUM Method 213.2 (Atomic Absorption, furnace technique) Optimum ConcentratIOn Range: DetectIOnLmllt: 0 1ug/l PreparatIOn of Standard SolutIOn 0 5-10 ug/l 1 2 3 Sample 1 Sample 1 Stock solution Prepare as descnbed under "direct aspIratIon method" AmmonIum Phosphate solution (40%) DIssolve 40 grams of ammOnIum phosphate, (NH4)2HP04(analytical reagent grade) I I I deIOnIZed dIstl1led water and dIlute to 100 ml Prepare dI1utlOns ofthe stock cadmIUm solutIOn to be used as calIbratIOn standards at the tIme of analysIs To each 100 ml of standard and sample alIke add 20 ml of the ammOnIum phosphate solutIOn The calIbratIOn standards should be prepared to contam 05% (v/v) HN03 Preservation For sample handlIng 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 should contam 05% (v/v) HN03 Instrument Parameters (General) 1 Drymg TIme and Temp 30 sec-125°e 2 Ashmg Time and Temp 30 sec-5oooe 3 AtomIzmg TIme and Temp 10 sec-19OO°C 4 Purge Gas Atmosphere Argon 5 Wavelength 228 8 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 93 ofthe AtomIc AbsorptIOn Methods sectIOn ofthIS manual Approved for NPDES and SDWA Issued 1978 213 2-1 STORET NO. 01027 Dissolved 01025 Suspended 01026PDF Image | Methods for Chemical Analysis of Water and Wastes
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