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Chapter A6. Section 6.6. Alkalinity and acid neutralizing capacity

January 1, 2012

Alkalinity (determined on a filtered sample) and Acid Neutralizing Capacity (ANC) (determined on a whole-water sample) are measures of the ability of a water sample to neutralize strong acid. Alkalinity and ANC provide information on the suitability of water for uses such as irrigation, determining the efficiency of wastewater processes, determining the presence of contamination by anthropogenic wastes, and maintaining ecosystem health. In addition, alkalinity is used to gain insights on the chemical evolution of an aqueous system. This section of the National Field Manual (NFM) describes the USGS field protocols for alkalinity/ANC determination using either the inflection-point or Gran function plot methods, including calculation of carbonate species, and provides guidance on equipment selection. Newly published and revised chapters will be announced on the USGS Home Page on the World Wide Web under 'New Publications of the U.S. Geological Survey.'

Publication Year 2012
Title Chapter A6. Section 6.6. Alkalinity and acid neutralizing capacity
DOI 10.3133/twri09A6.6
Authors Stewart A. Rounds, Franceska D. Wilde
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Techniques of Water-Resources Investigations
Series Number 09-A6.6
Index ID twri09A6.6
Record Source USGS Publications Warehouse
USGS Organization U.S. Geological Survey