ASTM D4130 – Standard Test Method for Sulfate Ion in Brackish Water, Seawater, and Brines (Withdrawn 2024)
Description:
Significance and Use
5.1 The determination of sulfate and other dissolved constituents is important in identifying the source of brines produced during the drilling and production phases of crude oil or natural gas.
Scope
1.1 This test method covers the turbidimetric determination of sulfate ion in brackish water, seawater, and brines. It has been used successfully with synthetic brine grade waters; however, it is the user’s responsibility to ensure the validity of this test method to other matrices.
1.2 This test method is applicable to waters having an ionic strength greater than 0.65 mol/L and a sulfate ion concentration greater than 25 mg/L. A concentration less than 25 mg/L sulfate can be determined by using a standard addition method.
1.3 For brines having an ionic strength of less than 0.65 mol/L, refer to Test Methods D516.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
ASTM D413