ASTM D3673-89 (2024) PDF
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St ASTM D3673-89 (2024)
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Ст ASTM D3673-89 (2024)
Original standard ASTM D3673-89 (2024) in PDF full version. Additional info + preview on request
Full title and description
Standard Test Methods for Chemical Analysis of Alpha Olefin Sulfonates — ASTM D3673-89, reapproved 2024 (designation sometimes shown as D3673-89R24). This standard compiles laboratory procedures for routine chemical analysis and quality control of alpha olefin sulfonates (AOS) used in detergents and related surfactant products.
Abstract
ASTM D3673-89 specifies a set of test methods for compositional and quality parameters of alpha olefin sulfonates. Procedures include determination of moisture (distillation), sodium sulfate content, neutral oil, chloride (reported as NaCl), alkalinity, pH, color (Pt–Co/Klett measurement), and active content (methylene blue titration). The methods are intended for routine quality control and acceptance testing of AOS materials.
General information
- Status: Active (reapproved 2024).
- Publication date: Original designation 1989; reapproval / latest update 2024 (designation D3673-89R24; ASTM store records show last update in November 2024).
- Publisher: ASTM International (developed by committee D12, subcommittee D12.12 - surface-active agents).
- ICS / categories: Surface-active agents / detergents — ICS commonly classified under 71.100.40 (surface-active agents).
- Edition / version: D3673-89 (current reapproval marked R24 / 2024 republication).
- Number of pages: Approximately 9–10 pages (concise methods booklet).
Scope
These test methods cover the chemical analysis of alpha olefin sulfonates. Analytical procedures are presented in sequence for: moisture by distillation; sodium sulfate; neutral oil; chlorides (calculated as NaCl); alkalinity; pH; color determination (platinum‑cobalt scale using Klett or equivalent); and determination of active matter by methylene blue titration. The standard specifies SI units as the reference and includes safety notes for laboratory handling of reagents.
Key topics and requirements
- Moisture determination by distilled-water method (procedure and calculation).
- Quantification of inorganic sulfate (reported as sodium sulfate) and chloride impurities (as NaCl).
- Extraction and measurement of neutral oil content (solvent extraction techniques).
- Alkalinity titration procedures and pH measurement methods for product control.
- Color measurement using the platinum‑cobalt (Pt‑Co / APHA) scale with instrument calibration guidance.
- Active content determination via methylene blue two‑phase titration (standardized end‑point technique).
- Use of SI units, safety and environmental notes for reagent handling and waste disposal.
Typical use and users
Primary users include surfactant and detergent manufacturers, quality control and analytical laboratories, raw‑material suppliers of alpha olefin sulfonates, formulation chemists, and regulatory or inspection bodies requiring standardized compositional testing for AOS products. The methods are suitable for routine QC, batch release testing, and comparative specification checks.
Related standards
Standards related by subject matter or jurisdiction include national and international methods for surface‑active agents and detergents (for example GB/T national standards for sodium alpha‑olefin sulfonate and ISO technical work from ISO/TC 91 on surface‑active agents). Other ASTM test methods and practice documents for surfactants and detergent analyses (developed under Committee D12) are often used in conjunction with D3673 for broader product characterization.
Keywords
alpha olefin sulfonates; AOS; surfactant analysis; methylene blue titration; Pt‑Co color; moisture by distillation; neutral oil; sodium sulfate; chloride (NaCl); ASTM D3673-89R24.
FAQ
Q: What is this standard?
A: ASTM D3673-89 is a collection of standard test methods for the chemical analysis of alpha olefin sulfonates (AOS), covering routine laboratory procedures used in product quality control.
Q: What does it cover?
A: It covers specific analytical procedures: moisture (distillation), sodium sulfate, neutral oil, chlorides (as NaCl), alkalinity, pH, color (Pt‑Co measurement), and active content (methylene blue titration), with instructions on units, calculations, and safety.
Q: Who typically uses it?
A: Manufacturers and suppliers of alpha olefin sulfonates, QC/analytical labs, formulation chemists in detergents and cleaning products, and regulatory/test laboratories performing compositional verification and acceptance testing.
Q: Is it current or superseded?
A: The 1989 designation (D3673-89) has been maintained and reapproved; the latest ASTM record shows a 2024 reapproval/version (often referenced as D3673-89R24), and the document is listed as active. Users should consult the ASTM catalog for the official, current reapproved text.
Q: Is it part of a series?
A: It is part of the body of ASTM test methods and practices for surface‑active agents and detergents (developed under Committee D12 and relevant subcommittees). It is commonly used alongside other national or international standards for surfactant testing.
Q: What are the key keywords?
A: Alpha olefin sulfonates, AOS, surfactant analysis, methylene blue titration, Pt‑Co color, moisture by distillation, neutral oil, sodium sulfate, chloride (NaCl), ASTM D3673.