Overview
ISO 2483:1973 is an international standard established by the International Organization for Standardization (ISO) that specifies a precise method for determining the moisture content in sodium chloride intended for industrial use. The document outlines a standardized gravimetric procedure for measuring the loss of mass when sodium chloride is dried at a controlled temperature of 110 ± 2 °C until constant mass is achieved. This method helps ensure consistent quality control during industrial processing and handling of sodium chloride.
Key Topics
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Scope and Application
The standard applies specifically to the determination of the conventional moisture content in industrial-grade sodium chloride. It is essential for quality assessment before sodium chloride is utilized in various industrial processes.
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Method Principle
The principle involves drying a sample of sodium chloride in an electric oven set to 110 ± 2 °C until its mass stabilizes. The loss of mass corresponds to the moisture content present in the sample.
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Apparatus Needed
- Squat weighing bottles with ground glass lids
- Electric oven with natural draught and accurate temperature control
- Desiccator with appropriate drying agents (e.g., silica gel)
- Analytical balance for precise mass measurements
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Sample Preparation and Testing
Approximately 10 g of sodium chloride is weighed and dried following careful temperature monitoring. If moisture content is very low (