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View Actual EPA Method 354.1 (PDF File)
EPA Method 354.1:Nitrite by Spectrophotometry. Official Name: Nitrogen, Nitrite (Spectrophotometric)
Summary:The diazonium compound formed by diazotation of sulfanilamide by nitrite in water under acid conditions is coupled with N-(1-naphthyl)-ethylenediamine dihydrochloride to produce a reddish-purple color which is read in a spectrophotometer.
Scope:This method determines nitrite in drinking, surface and saline waters; domestic and industrial wastes.
Citation:Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)
Interferences:(A) Oxidants and Reductants: Oxidants and reductants affect nitrite concentrations.(B) High alkalinity: Alkalinty > 600 mg/L will give low results due to a shift in pH.
QC Requirements:None.
Maximum Holding Time:48 hours (MCAWW, Table 1).
Media:WATER
Subcategory:Inorganic
Concentration:0.01 - 1.0 mg/L
Precision:Precision and accuracy data are not available.
Detection:-
Revision Number:Issued 1971
Test Description:Nitrate (as Nitrogen
Report Number:600/4-79-020