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View Actual EPA Method 252.2 (PDF File)
EPA Method 252.2:Osmium by Graphite Furnace AA. Official Name: Osmium (Atomic Absorption, Furnace Technique)
Summary:A sample prepared according to EPA Method 200.0 is analyzed using a graphite furnace atomic absorption spectrometer. Specifications for instrument operation and preparation of standards are provided in the method.
Scope:This method determines osmium by graphite furnace atomic absorption spectrometry. Sample pretreatment according to EPA Method 200.0 determines the applicability.
Citation:Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)
Interferences:Background correction is recommended.Since this metal volatilizes near 150oC, the allowable ashing temperature must be verified in the sample matrix being analyzed.For additional interferences see EPA Method 200.0.
QC Requirements:QC requirements for drinking water procedures are provided in method 200.0
Maximum Holding Time:6 months (MCAWW, Table 1).
Media:WATER
Subcategory:Inorganic
Concentration:50-500 ug/L (optimal range).
Sample Prep:200
Precision:Precision and accuracy data are not available.
Detection:The DL is to be considered the minimum working limit achievable with this method.
Revision Number:Issued 1978