ASTM D1067-16 (2024) PDF

Full title and description

Standard Test Methods for Acidity or Alkalinity of Water — designation D1067‑16, reapproved 2024 (often shown as D1067‑16R24). The standard describes titrimetric and electrometric procedures for measuring the acidity or alkalinity (acid‑neutralizing or base‑neutralizing capacity) of all types of water, including procedures to address samples containing reactive iron and other interferences.

Abstract

ASTM D1067 provides three primary test methods (electrometric titration and two endpoint titration approaches, including an oxidation/boiling step for waters with reactive iron) to quantify acidity or alkalinity. Results are used to determine buffering capacity, inflection points on a pH titration curve, and to report acidity/alkalinity values (commonly as mg/L CaCO3) for process control, treatment design, and environmental compliance. The standard emphasizes analyst judgement where sample matrix effects or interferences exist.

General information

• Status: Current — original revision D1067‑16, reapproved 2024.
• Publication date: 2016 (revision), reapproval/corrigendum recorded 2024.
• Publisher: ASTM International (American Society for Testing and Materials).
• ICS / categories: 13.060.50 (Examination of water for chemical substances / water analysis).
• Edition / version: D1067‑16 (reapproved 2024) — sometimes cited as D1067‑16R24.
• Number of pages: 8 pages (official reapproved document listing).

Scope

These test methods cover determination of acidity or alkalinity of all types of water by titration. Test Method A is an electrometric titration that produces a full pH (titration) curve and identifies buffering zones and inflection points. Test Methods B and C are endpoint titrations used for routine control; Test Method C includes an oxidation/boiling step (for example with hydrogen peroxide) to eliminate interferences from ferrous iron and other oxidizable species prior to titration. The standard notes analyst responsibility to select the most appropriate method and endpoint for the sample matrix and intended use.

Key topics and requirements

• Three primary procedures: Test Method A (electrometric/pH curve), Test Method B (indicator or electrometric endpoint for routine measurements), and Test Method C (oxidation/boiling then titration for reactive samples).
• Electrometric titration technique to develop a pH curve and locate inflection points (most precise method for characterization).
• Endpoint selection guidance and the effect of buffering components on results; analyst must evaluate matrix effects and interferences.
• Sample pretreatment options (oxidation/boiling) for waters containing ferrous iron or other oxidizable constituents that would bias results.
• Reporting conventions — acidity/alkalinity commonly expressed as mg/L CaCO3 (and other units as required by user/regulation).
• Applicability for process control, corrosion/scale control calculations, environmental monitoring, and wastewater/mine drainage analysis.

Typical use and users

Laboratories in municipal water utilities, power and process plants, mining and mine drainage monitoring, environmental testing labs, industrial wastewater facilities, and academic research groups use D1067 procedures. Typical users are analytical chemists, water treatment engineers, environmental compliance staff, and operators needing routine or diagnostic acidity/alkalinity data for process control and regulatory reporting.

Related standards

Standards commonly used alongside D1067 include ASTM test methods for pH (e.g., D1293 — Standard Test Methods for pH of Water) and for electrical conductivity/resistivity (e.g., D1125). D1067 is published within the ASTM water and environmental technology collection and is referenced by some regulatory and laboratory practice documents addressing water analysis.

Keywords

acidity, alkalinity, titration, electrometric titration, pH curve, buffering capacity, milligrams per liter CaCO3, water analysis, oxidation/boiling, mine drainage, environmental monitoring.

FAQ

Q: What is this standard?

A: ASTM D1067 is a set of standard test methods for determining the acidity or alkalinity of water by titrimetric and electrometric procedures (designation D1067‑16, reapproved 2024).

Q: What does it cover?

A: It covers three primary procedures—an electrometric titration to produce a full pH/titration curve (Test Method A), routine endpoint titrations (Test Method B), and an oxidation/boiling titration for samples with reactive iron or similar interferences (Test Method C). Guidance is given on endpoint selection, sample handling, and reporting.

Q: Who typically uses it?

A: Environmental and water testing laboratories, utilities, power and process plants, mining operations, and wastewater facilities use the methods for process control, corrosion/scale assessment, regulatory monitoring, and research.

Q: Is it current or superseded?

A: The listed revision is D1067‑16 and the document was reapproved in 2024 (current as reapproved). A revision work item to update D1067 was recorded by ASTM committees after 2024, indicating further revision activity in the ASTM work program (users should verify the current status with ASTM if a latest revision is required).

Q: Is it part of a series?

A: Yes — D1067 is part of ASTM’s water and environmental technology standards (committee D19) and is published in the Annual Book/volumes covering water analysis; it is commonly used in combination with other ASTM water standards (pH, conductivity, related sampling practices).

Q: What are the key keywords?

A: Acidity, alkalinity, titration, electrometric titration, pH curve, buffering capacity, CaCO3, oxidation/boiling, water analysis.