EPA Standard Norms and Instruments for UV/Vis Spectroscopy

This method applies to the measurement of nitrogen oxide (NOX) emissions from fossil-fuel- fired steam generators, electric utility plants, nitric acid plants, or other sources as specified in the regulations.

The platinum-cobalt method is useful for measuring the color of water derived from naturally occurring materials, i.e., vegetable residues such as leaves, barks, roots, humus, and peat materials.

This silver diethyldithiocarbamate spectrophotometric method determines inorganic arsenic in drinking water and most fresh and saline waters in the absence of high concentrations of chromium, cobalt, copper, mercury, molybdenum, nickel, and silver. Industrial wastes may be analyzed after digestion by EPA Method 206.5.

This method determines boron in drinking waters, surface waters, and domestic and industrial wastes. The method is applicable for the determination of boron in the range 0.1-1.0 mg/L of boron.

This standard specifies the method for the DPD (N,N-diethyl-p-phenylenediamine)-colorimetric determination of chlorine in natural and treated waters at concentrations from 0.2-4 mg/L.

This standard specifies the method for colorimetric determination of the total fluoride content in drinking, surface, and saline waters and domestic and industrial wastes.

This method covers the determination of ammonia in drinking, ground, surface, and saline waters and domestic and industrial wastes. The applicable range is 0.01-2.0 mg/L NH3 as N.

This standard specifies the method for the spectrophotometric determination of nitrite in drinking, surface, and saline waters and domestic and industrial wastes.

This standard specifies the method to determine total phosphorus, hydrolyzable phosphorus, and orthophosphate in drinking, ground, and surface waters and domestic and industrial wastes.

This standard outlines the manual method for determining the dissolved and total orthophosphate, hydrolyzable phosphate, and phosphorus (in all forms) in drinking water, surface water, and saline water, as well as domestic and industrial wastewater, using a colorimetric technique with a single reagent.

This standard specifies the method for determining the dissolved and total orthophosphate, hydrolyzable phosphate, and phosphorus (in all forms) in drinking water, surface water, and saline water, as well as domestic and industrial wastewater, using a colorimetric technique with two reagents.

This standard specifies the method for the colorimetric determination of silica in drinking, surface, and saline waters and domestic and industrial wastes. The working range of the method is approximately 2 to 25 mg silica/L.

This standard specifies the colorimetric method using methylene blue for determining sulfide in drinking water, surface water, saline water, and domestic and industrial wastewater.

This method covers the determination of chemical oxygen demand (COD) in ground and surface waters and domestic and industrial wastes. The applicable range is 3-900 mg/L.

This method is applicable to the measurement of methylene blue active substances (MBAS) in drinking waters, surface waters, and domestic and industrial wastes.

This method is used to determine the concentration of dissolved hexavalent chromium [Cr(VI)] in EP/TCLP characteristic extracts and groundwater. The method is applicable to determine the Cr(VI) concentration from 0.5 to 50 mg of Cr(VI) per liter.

This method can be used for measuring free (non-complexed) cyanide and hydrocyanic acid in drinking water, natural surface waters, domestic and industrial wastewater, and soil extracts using titrimetric and manual spectrophotometric techniques (Colorimetric).

This standard specifies the method for the spectrophotometric determination of sulfate in ground water, drinking water, surface water, and domestic and industrial wastewater using the turbidimetric method. The optimum determination range is 0 - 40 mg/L of SO4²⁻ .

This standard specifies the manual method for the 4-AAP spectrophotometric determination of phenol in ground water, drinking water, surface water, saline water, and domestic and industrial wastewater.

This method can be used for measuring chloride in ground water, drinking, surface, and saline waters, and domestic and industrial wastes. The applicable range is 1-200 mg of chloride per litre of sample.