scope:

This test method² covers the determination of soluble fluoride ions in brackish water, seawater and brines by use of a fluoride selective electrode.

Samples containing from 1.0 to 25 mg/L can be analyzed by this test method.

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

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.

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.

² Additional information is contained in the following references: Hoke, S. H., Fletcher, G. E., and Collins, A. G., "Fluoride and Iodide Selective Electrodes Applied to Oilfield Brine Analysis," U.S. Department of Energy, Report of Investigations, BETC/RI-78/7.Rix, C. J., Bond, A. M., and Smith, J. D., "District Determination of Fluoride in Sea Water with a Fluoride Selective Ion Electrode by a Method of Standard Additions," Analytical Chemistry, Vol 48, 1976, p. 1236.