ASTM-D3875 › Historical Revision Information
Standard Test Method for Alkalinity in Brackish Water, Seawater, and Brines
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Scope
1.1 This test method covers the determination of alkalinity in brackish water, seawater, and brines.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
Alkalinity as carbonate and bicarbonate of saline water is very important in chemical waterflooding or tertiary recovery processes for recovering petroleum. Alkaline waters offer better wetting to the formation rock and improve oil release. As an additional benefit, ions that provide alkalinity adsorb on rock surfaces occupying adsorption sites and decrease the loss of recovery chemical by adsorption. Determination of alkalinity in waters used in tertiary recovery processes is therefore very important.
An alkalinity value is necessary in the calculation of carbonate scaling tendencies of saline waters. It is also necessary to determine the alkalinity if the ionic balance of a water analysis is to be used as a check of the reliability of the analysis.
Keywords
alkalinity; brackish; brine; seawater; ICS Number Code 13.060.50 (Examination of water for chemical substances)
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13.060.50 (Examination of water for chemical substances)
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Document Number
ASTM-D3875-03
Revision Level
2003 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
Aug. 10, 2003
Document Type
Test Method
Page Count
4 pages
Committee Number
D19.05