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Significance and Use
4.1 Identification of a brackish water, seawater, or brine is determined by comparison of the concentrations of their dissolved constituents. The results are used to evaluate the origin of the water, determine if it is a possible pollutant or determine if it is a commercial source of a valuable constituent such as iodine or bromine.
1.1 These test methods cover the determination of soluble iodide and bromide ions, or both, in brackish water, seawater, and brines. Four test methods are given as follows:
1.1.1 Test Method A for both Iodide and Bromide Ions—Volumetric, for concentrations from 0.2 to 2000 mg/L iodide and from 5 to 6500 mg/L bromide (Sections ).
1.1.2 Test Method B for Iodide Ion—Colorimetric, for concentrations from 0.2 to 2000 mg/L iodide (Sections ).
1.1.3 Test Method C for Iodide Ion—Selective electrode, for concentrations from 1 to 2000 mg/L iodide (Sections ).
1.1.4 Test Method D for Bromide Ion—Colorimetric, for concentrations from 40 to 6500 mg/L bromide (Sections ).
1.2 Test Method A is intended for use on all brackish waters, seawaters, and brines that contain appreciable amounts of iodide or bromide ions or both. Test Methods B, C, and D, because of their rapidity and sensitivity, are recommended for the analysis of brackish waters, seawaters, and brines in the field and in the laboratory.
1.3 Samples containing from 0.2 to 2000 mg/L of iodide or 5 to 6500 mg/L of bromide may be analyzed by these methods.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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. For specific precautionary statements, see and .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
E60 Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry
E200 Practice for Preparation, Standardization, and Storage of Standard and Reagent Solutions for Chemical Analysis
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
ASTM D3869-15, Standard Test Methods for Iodide and Bromide Ions in Brackish Water, Seawater, and Brines, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top