Overview
SIST ISO 7990:2001 outlines standardized analytical methods for the determination of total iron content in manganese ores and concentrates. The document specifies two reliable chemical analysis methods: a titrimetric method after reduction (Method A) and a sulfosalicylic acid spectrophotometric method (Method B). These analyses provide critical data for the quality assessment and grading of manganese products widely used in metallurgical, chemical, and related industries. The standard is applicable across a range of total iron content: Method A suits products with 1–25% iron, while Method B addresses ores containing 0.2–2% iron. For full implementation and reliable results, SIST ISO 7990:2001 should be read alongside ISO 4297 for general analytical instructions and ISO 4296 for sampling and sample preparation.
Key Topics
Applications
SIST ISO 7990:2001 is crucial in industries and laboratories engaged in the extraction, beneficiation, and processing of manganese ores and concentrates. Its practical applications include:
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Quality Control:
Ensures consistent assessment of ore quality based on total iron content, influencing commercial value and suitability for downstream processing.
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Product Certification:
Provides standardized methodology required for certification to global trade partners and regulatory bodies.
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Process Optimization:
Supports metallurgical and chemical processes where iron levels impact yield, efficiency, and product properties.
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Research and Development:
Offers a benchmark for new analytical technologies and process improvements in mineral analysis.
Adhering to this standard ensures reliable, accurate, and comparable results across different laboratories and operational contexts, supporting fair trade and compliance with international quality requirements.
Related Standards
To achieve robust and harmonized results compliant with international best practices, SIST ISO 7990:2001 refers to and should be used in conjunction with the following standards:
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ISO 4297:
General methods for chemical analysis of manganese ores and concentrates. Essential for understanding and applying proper analytical principles across similar standards.
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ISO 4296-1:
Manganese ores - Sampling - Part 1: Guidance for incremental sampling and sample division to obtain representative test samples.
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ISO 4296-2:
Manganese ores - Sampling - Part 2: Procedures for sample preparation prior to chemical analysis.
These related standards provide comprehensive support for accurate sampling, preparation, and analysis, ensuring the practical value and global acceptance of chemical data derived from manganese ore testing. By following SIST ISO 7990:2001 together with the referenced standards, organizations enhance credibility and efficiency in their mineral analysis processes.