ASTM D3869-15 (2023) PDF

Full title and description

Standard Test Methods for Iodide and Bromide Ions in Brackish Water, Seawater, and Brines — ASTM designation D3869-15(2023). This document provides four validated test procedures (volumetric, colorimetric, and selective-electrode approaches) for the determination of soluble iodide and bromide ions in natural and produced waters, including brackish waters, seawaters, and industrial brines.

Abstract

ASTM D3869-15(2023) specifies test methods A–D to determine iodide and bromide concentrations across a wide range of concentrations using titration (volumetric), colorimetric, and selective-electrode techniques. The methods include guidance on sampling, reagents, apparatus, interferences, precision and bias, and calculation procedures for routine laboratory and field analyses of marine and brine matrices. The current edition was approved April 1, 2023.

General information

• Status: Active — current edition approved April 1, 2023 (designated D3869-15(2023)).
• Publication date: April 1, 2023 (published 2023, reapproval/revision of D3869-15 series).
• Publisher: ASTM International (Committee D19 on Water; Subcommittee D19.05 on Inorganic Constituents in Water).
• ICS / categories: Water analysis / examination of water for chemical substances — ICS code commonly cited for these methods 13.060.50 (examination of water for chemical substances).
• Edition / version: D3869-15(2023) — current reapproval/revision of the D3869 series (originally adopted 1979; later revisions include 2004 and 2015 editions).
• Number of pages: 12 pages (typical published length for this designation).

Scope

These test methods cover determination of soluble iodide and bromide ions in brackish water, seawater, and brines. Four specific methods are provided: Test Method A — Volumetric for both iodide and bromide (approximate ranges: 0.2 to 2000 mg/L iodide; 5 to 6500 mg/L bromide); Test Method B — Iodide by colorimetric technique (≈0.2 to 2000 mg/L iodide); Test Method C — Iodide by selective electrode (≈1 to 2000 mg/L iodide); Test Method D — Bromide by colorimetric technique (≈40 to 6500 mg/L bromide). Methods include sample handling, reagents, interference control, and calculation of results.

Key topics and requirements

• Four validated test procedures (A: volumetric titration; B: iodide colorimetry; C: iodide selective electrode; D: bromide colorimetry).
• Concentration ranges and method selection guidance to match sample matrix and expected analyte levels (detection and working ranges noted above).
• Details on sample collection and preservation consistent with ASTM Practices for water sampling (to avoid contamination or losses).
• Required reagents and reagent purity (ACS-grade chemicals recommended; specification for reagent water Type I where applicable).
• Apparatus and equipment: pipets, mechanical bottle shaker, hot-water bath, electrodes (for Method C), spectrophotometer (for colorimetric methods), titration apparatus, and related glassware).
• Interferences and mitigation: common interferences include iron, manganese, organics and surfactants; recommended removal, masking or corrective steps are described.
• Precision, bias, and quality control: procedures and references for evaluating precision and bias of the test methods, and guidance for QC/validation in laboratory and field use.

Typical use and users

Applied by environmental and commercial testing laboratories, oceanographic and marine research groups, desalination and brine producers, oilfield and produced-water analysts, and regulatory/quality-control teams that require routine or forensic measurement of iodide and bromide in saline matrices. Methods are suitable for both field and laboratory settings where rapid or sensitive determinations are needed.

Related standards

Referenced and related ASTM and practice documents commonly cited in D3869 include Terminology D1129, Specification for Reagent Water D1193, Practice for Determination of Precision and Bias D2777, Practices for Sampling Water D3370, Guide for Spiking into Aqueous Samples D5810, Practice for Writing Quality Control Specifications D5847, and practice/methods from E-series (spectrophotometry and standard solution preparation). These referenced documents provide supporting definitions, sampling practice, QC, and instrumentation performance criteria used alongside D3869 methods.

Keywords

iodide, iodide ion, bromide, bromide ion, brackish water, seawater, brines, volumetric titration, colorimetric, selective electrode, iodate, bromate, water analysis, ASTM D3869.

FAQ

Q: What is this standard?

A: ASTM D3869-15(2023) is a suite of standard test methods for measuring soluble iodide and bromide ions in brackish water, seawater, and brines using volumetric, colorimetric, and selective-electrode techniques.

Q: What does it cover?

A: It covers four test methods (A–D) that describe applicable concentration ranges, reagents, apparatus, procedures, interference controls, calculation of results, and requirements for precision and bias for routine and field analyses. Test Method A is volumetric for both ions; B and D are colorimetric for iodide and bromide respectively; C is a selective-electrode method for iodide.

Q: Who typically uses it?

A: Environmental and commercial analytical laboratories, oceanographic researchers, desalination and brine producers, oilfield water analysts, and regulatory agencies performing water-quality or constituent source evaluations.

Q: Is it current or superseded?

A: The designation D3869-15(2023) is the current approved edition as of April 1, 2023; it represents the most recent reapproval/revision of the D3869 methods. Earlier editions (for example 2004 and 2015 revisions) have been superseded by this 2023 approval.

Q: Is it part of a series?

A: Yes — it falls under ASTM Committee D19 on Water (Subcommittee D19.05 for inorganic constituents) and is published within the ASTM water-analysis series of standards addressing inorganic and chemical determinations in water matrices.

Q: What are the key keywords?

A: Iodide, bromide, brackish water, seawater, brine, volumetric titration, colorimetric analysis, selective electrode, water analysis, ASTM D3869.