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ASTM D3875-15(2023)

Historical Reaffirmation

Standard Test Method for Alkalinity in Brackish Water, Seawater, and Brines

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1.1 This test method covers the determination of alkalinity in brackish water, seawater, and brines.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 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.

5.2 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.

SDO ASTM: ASTM International
Document Number D3875
Publication Date April 1, 2023
Language en - English
Page Count 4
Revision Level 15(2023)
Supercedes
Committee D19.05
Publish Date Document Id Type View
Feb. 1, 2015 D3875-15 Revision
Oct. 1, 2008 D3875-08 Revision
Aug. 10, 2003 D3875-03 Revision
Dec. 10, 1997 D3875-97 Revision
April 1, 2023 D3875-15R23 Reaffirmation