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View Actual EPA Method 202.2 (PDF File)
EPA Method 202.2:Aluminum by Graphite Furnace AA. Official Name: Aluminum (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 aluminum 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:(A) Dissolved solids: Use background correction as high dissolved solids are present.(B) Chloride and nitrogen: Chloride ion and nitrogen can suppress the aluminum signal. Avoid the use of halide acids and nitrogen purge gas.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:20-200 ug/L (optimal range).
Sample Prep:200
Precision:Precision and accuracy values were calculated using interlaboratory data from EPA-managed Water Pollution (WP) performance evaluation studies.
Detection:The DL is to be considered the minimum working limit achievable with this method.
Revision Number:Issued 1978