ASTM D4328-84(1993)e1 - 10.12.1997
 
1. Scope

1.1 This practice covers the calculation of supersaturation of barium sulfate, strontium sulfate, and calcium sulfate dihydrate (gypsum) in brackish water, seawater, and brines in which barium, strontium, and calcium ions either coexist or exist individually in solution in the presence of sulfate ions.

1.2 This practice is not applicable for calculating calcium sulfate dihydrate supersaturation if the temperatures of saline waters under investigation exceed 95°C. At temperatures above 95°C, hemianhydrate and anhydrite would be major insoluble forms.

1.3 This standard does not purport to address all of the safety problems, 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.

 
2. Referenced Documents

D3370-25

Standard Practices for Sampling Water from Flowing Process Streams

D3561-16(2021)e1

Standard Test Method for Lithium, Potassium, and Sodium Ions in Brackish Water, Seawater, and Brines by Atomic Absorption Spectrophotometry (Includes all amendments and changes 12/22/2021).

D3651-16(2021)e1

Standard Test Method for Barium in Brackish Water, Seawater, and Brines (Includes all amendments and changes 12/22/2021).

D3986-17(2025)

Standard Test Method for Barium in Brines, Seawater, and Brackish Water by Direct-Current Argon Plasma Atomic Emission Spectroscopy

D511-14(2021)e1

Standard Test Methods for Calcium and Magnesium In Water (Includes all amendments and changes 12/6/2021).

D512-23

Standard Test Methods for Chloride Ion In Water

D513-16(2024)

Standard Test Methods for Total and Dissolved Carbon Dioxide in Water

D516-22

Standard Test Method for Sulfate Ion in Water

D1129-24

Standard Terminology Relating to Water

D3352-15

Standard Test Method for Strontium Ion in Brackish Water, Seawater, and Brines (Withdrawn 2024)