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IRON Method 236.2 (Atomic Absorption, furnace technique) Optimum Concentration Range: Detection Limit: 1 ug/l Preparation of Standard Solution 5-100 ug/l 1 2. 3 Sample 1 Sample 1 Stock SolutlOn Prepare as descnbed under "direct asplratlOn method" Prepare dilutlOns of the stock solutlOn to be used as cahbratlOn standards at the time of analysIs ThesesolutlOnsarealsotobeusedfor"standardadditions" the cahbratlOn standard should be diluted to contam 0 5% (vIv) HN03 Preservation For sample handlmg and preservation, see part 4 1 of the Atomic AbsorptlOn Methods sectlOn of this manual Preparation Prepare as descnbed under "direct asplratlOn method" Sample solutions for analysts should contam 05% (v/v) HN03 Instrument Parameters (General) 1 DrymgTlmeand Temp 30sec-125°C 2 Ashmg Time and Temp 30 sec-lOOO°C 3 Atomlzmg Time and Temp 10 sec-2700°C 4 Purge Gas Atmosphere Argon 5 W avelength 248 3 n m 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 AbsorptlOn Methods sectlOn ofthis manual Notes 1 The above concentratlOn 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 non-pyrolytic Approved for NPDES Issued 1978 2362-1 STORET NO. Total 01045 Dissolved 01046 Suspended 01044PDF Image | Methods for Chemical Analysis of Water and Wastes
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