Chlorine

-Residual Chlorine (By SM 4500-Cl B-2011)

Scope:

The iodometric method is suitable for measuring total chlorine concentrations greater than 1 mg/L in natural and treated waters. Not applicable to estuarine or marine waters.

Chlorine will liberate free iodine from potassium iodide (KI) solutions at pH 8 or less. The liberated iodine is titrated with a standard solution of sodium thiosulfate (Na2S2O3) with starch as the indicator. Titrate at pH 3 to 4 because the reaction is not stoichiometric at neutral pH due to partial oxidation of thiosulfate to sulfate.

-Standard Methods Online – Standard Methods for the Examination of Water and Wastewater

Method Data

Analyte List

*Please contact our project management team for more information about reporting limits and other specific project needs.

Chlorine

–Inorganic Anions by Ion Chromatography (By EPA 300.0)

Scope:

Part A of the test method covers the determination of common inorganic anions in drinking water, surface water, mixed domestic and industrial wastewaters, groundwater, reagent waters, solids (after extraction), leachates (when no acetic acid is used). Part B of the test method covers the determination of bromate, chlorate, and chlorite in drinking and reagent waters.

A small volume of sample, typically 50-100 uL, is introduced into an ion chromatograph. The anions of interest are separated and measured, using a system comprised of a guard column, separator column, suppressor device, and conductivity detector.

-Methods for the Determination of Inorganic Substances in Environmental Samples (EPA/600/R-93/100)

Method Data

Analyte List

*Please contact our project management team for more information about reporting limits and other specific project needs.