ISO 2197:1972

Overview

ISO 2197:1972 specifies a list of recommended methods of test and the procedure for preparation of the test sample for sodium hydrogen carbonate for industrial use. Prepared by ISO/TC 47 (Chemistry) and first published in 1972, this standard supports consistent chemical analysis and quality control of industrial-grade sodium hydrogen carbonate.

The document is primarily a reference standard that identifies the appropriate analytical methods and the correct handling of laboratory test samples rather than prescribing new analytical techniques.

Key Topics

• Test sample preparation: When a complete analysis is intended, take about 250 g of the laboratory sample and place it in a perfectly dry, tightly closable container whose capacity is such that the sample fills it almost completely.
• Marking and traceability: Containers shall bear a label showing the origin, identification of the sample and the date on which the sample was placed in the container.
• Listed test methods: The standard lists the relevant methods to be used for chemical analysis, including references to related ISO methods for specific determinations (see Related Standards below).
• Scope: The standard is a compilation and indexing of test methods and sample-handling requirements relevant to industrial sodium hydrogen carbonate; it does not replace test-method standards but points to them.

Applications

ISO 2197:1972 is useful for laboratories, manufacturers and quality-assurance teams involved in the handling and analysis of industrial sodium hydrogen carbonate. Practical applications include:

• Standardizing sample preparation for laboratory analysis to reduce variability between tests.
• Ensuring traceability and correct labelling of samples for batch control and audits.
• Supporting quality control programs by identifying the correct analytical references for moisture, chlorides, iron and related determinations.
• Guiding procurement and inspection processes where consistent analytical bases are required for acceptance or release of material.

Benefits:

• Improved comparability of analytical results across laboratories.
• Reduced sampling and handling errors through clear sample-preparation guidance.
• Streamlined references to established methods for common impurities and properties.

Related Standards

ISO 2197 acts as a hub referencing specific analytical standards. Relevant referenced standards include:

• ISO 2198 – Sodium carbonate (reference listed in ISO 2197)
• ISO 2199 – Sodium hydrogen carbonate (reference listed in ISO 2197)
• ISO 2200 – Moisture determination (reference listed in ISO 2197)
• ISO 2201 – Chlorides (expressed as NaCl) (reference listed in ISO 2197)
• ISO 2460 – Iron (expressed as Fe2O3) (reference listed in ISO 2197)

Note: Sampling of chemical products is indicated in the standard as the subject of a further International Standard; laboratories should consult current ISO catalogs for updated sampling and analytical procedures.

For practical implementation, combine ISO 2197's sample-handling guidance with the full text of the specific analytical methods referenced to ensure compliant, repeatable testing and reliable quality control of industrial sodium hydrogen carbonate.