ISO 2466:1973 PDF

Overview

ISO 2466:1973 is an international standard established by the International Organization for Standardization (ISO) that defines precise guidelines for the sampling and preparation of potassium hydroxide (KOH) for industrial use. It emphasizes the importance of proper test sample collection and the preparation of a main solution for accurate chemical determinations. This standard addresses the unique properties of potassium hydroxide, such as its hygroscopic nature, ability to absorb carbon dioxide, and corrosive effects on containers, all of which require strict handling precautions to ensure sample integrity.

ISO 2466:1973 replaces earlier ISO Recommendations R 988-1969 and R 989-1969 and is applicable worldwide, providing a uniform approach to ensure reliable testing results and consistent quality control in industries using potassium hydroxide.

Key Topics

• Sampling Conditions

  • Potassium hydroxide samples must be taken rapidly in a dry atmosphere to prevent moisture absorption and contamination.
  • Handling should occur in an environment free from carbon dioxide and moisture, ideally within a "glove box" equipped with dehumidifying agents like phosphorus pentoxide.

• Sample Storage

  • Laboratory samples should be stored in airtight containers made from materials that do not introduce contaminants (e.g., silica-free materials such as polyethylene).
  • Containers should be appropriately labeled with the origin, identification, and date of sampling.

• Preparation of Test Samples

  • Solid samples need to be ground to ensure particle size does not exceed approximately 6 mm.
  • Samples must be protected from atmospheric contact during all handling stages.

• Main Solution Preparation for Determination

  • Solid KOH: Dissolve a test portion (~50 g) in about 200 ml distilled water, transfer to a 1000 ml volumetric flask, dilute to the mark, cool to room temperature, and mix thoroughly.
  • Liquid KOH: Transfer the test portion directly into a 1000 ml volumetric flask, dilute with distilled water, cool, and mix similarly.
  • Special care is required if silica content determination is intended-use silica-free containers such as polyethylene or silver.

• Use of Distilled Water

  • Only distilled or equivalently pure water should be used as the solvent to avoid contamination affecting chemical analysis.

Applications

ISO 2466:1973 is crucial for industries and laboratories involved in:

• Quality control and assurance of industrial potassium hydroxide to maintain product specifications.
• Chemical analysis laboratories performing compositional determinations on KOH samples.
• Manufacturing sectors employing KOH in production processes, where accurate sample preparation impacts product consistency.
• Environmental and safety testing, where correct sample handling prevents hazardous reactions due to KOH’s corrosive and reactive nature.

Adhering to this standard allows manufacturers and laboratories worldwide to produce reliable, reproducible results, thus reducing risks related to inaccurate sampling and preparation.

Related Standards

• ISO Recommendations R 988-1969 and R 989-1969

  • These were the preceding guidelines for potassium hydroxide sample preparation that ISO 2466:1973 cancels and replaces.

• ISO 3696

  • Specifies water specifications, which may be relevant as high-purity distilled water is required for sample solution preparation in ISO 2466.

• ISO/TC 47 (Chemistry Technical Committee)

  • The technical committee responsible for developing standards related to chemical substances including potassium hydroxide.

By following ISO 2466:1973, industries and laboratories gain a standardized, internationally recognized procedure for handling potassium hydroxide samples, ensuring the safety, accuracy, and efficacy of chemical analyses essential for industrial applications.