Standard ASTM D3868-95R99
1.1 This test method covers the determination of soluble fluoride ions in brackish water, seawater and brines by use of a fluoride selective electrode.
1.2 Samples containing from 1.0 to 25 mg/L can be analyzed by this test method.
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 and health practices and determine the applicability of regulatory limitations prior to use.