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Method 415.3, Rev. 1.2: Determination of Total Organic Carbon and Specific UV Absorbance at 254 nm in Source Water and Drinking Water
Citation:
POTTER, B. B. AND J. WIMSATT. Method 415.3, Rev. 1.2: Determination of Total Organic Carbon and Specific UV Absorbance at 254 nm in Source Water and Drinking Water. U.S. Environmental Protection Agency, Washington, DC, 2009.
Impact/Purpose:
The Office of Ground Water and Drinking Water requests that EPA Method 415.3, Revision 1.1 be updated to allow the use of single beach spectrophotometers. This involves minor changes to the method to describe the revised zeroing procedure. In addition, Table 17.3.3 has a decimal point error in the UVA data which should be corrected
Description:
This method provides procedures for the determination of total organic carbon (TOC), dissolved organic carbon (DOC), and UV absorption at 254 nm (UVA) in source waters and drinking waters. The DOC and UVA determinations are used in the calculation of the Specific UV Absorbance (SUVA). For TOC and DOC analysis, the sample is acidified and the inorganic carbon (IC) is removed prior to analysis for organic carbon (OC) content using a TOC instrument system. The measurements of TOC and DOC are based on calibration with potassium hydrogen phthalate (KHP) standards. This method is not intended for use in the analysis of treated or untreated industrial wastewater discharges as those wastewater samples may damage or contaminate the instrument system(s).