Overview
SIST ISO 317:2001 specifies a reliable spectrometric method for determining the arsenic content in manganese ores and concentrates. Developed by the Slovenian Institute for Standardization (SIST) and aligned with ISO practices, this standard is applicable to products with an arsenic content ranging from 0.001% to 0.2% by mass. Designed for laboratories analyzing mineral samples, the standard details clear procedures for sample preparation, chemical reactions, required reagents, analytical apparatus, step-by-step analysis, and the proper calculation and expression of results. For full implementation, users should refer to the companion standard ISO 4297, which provides general instructions for chemical analysis of manganese ores.
Key Topics
- Scope and Applicability: Method covers manganese ores and concentrates with arsenic levels between 0.001% - 0.2% (m/m).
- Analytical Principle: The procedure involves the decomposition of samples with acids, separation and oxidation-reduction transformations, distillation, and spectrometric measurement of arsenic.
- Required Equipment: Includes specialized apparatus for distillation (diagram provided in the standard), spectrometric equipment for measuring absorbance at specified wavelengths (630-700 nm or 840 nm), and standard laboratory glassware.
- Reagents: Involves use of hydrochloric, nitric, sulfuric and perchloric acids, ammonium molybdate, ascorbic acid, hydrazine sulfate, and potassium bromide, among others.
- Sample Handling: Guidance for sample selection, preparation, and size reduction (less than 100 μm) is provided, ensuring analytical accuracy and repeatability.
- Calculation and Reporting: Specifies how to calculate arsenic content with the required tolerances, ensuring results are expressed as a percentage by mass. Clear instructions on parallel determination tolerances help maintain data integrity.
Applications
- Quality Control: Essential for mining and metallurgical laboratories ensuring manganese ore complies with industry and safety standards.
- Environmental Compliance: Accurate determination of arsenic supports regulatory reporting and helps prevent environmental contamination.
- Export and Import Verification: Provides internationally recognized analysis criteria for cross-border trade and regulatory assurance.
- Process Optimization: Identifying arsenic content aids in refining processes and minimizing harmful by-products during manganese extraction and processing.
- Research and Development: Supports scientific studies and product development requiring precise control of arsenic levels in manganese-based materials.
Related Standards
- ISO 4297: Outlines general instructions for chemical analysis of manganese ores and concentrates. Essential for laboratories undertaking analyses according to SIST ISO 317:2001.
- ISO 4296-1 & ISO 4296-2: Cover sampling and preparation of manganese ore samples, ensuring that laboratories follow best practices for representative and accurate analyses.
- ISO 5725: Specifies methods for accuracy and precision in analytical sampling, relevant for maintaining method reliability in spectrometric determinations.
- Other Chemical Analysis Methods for Manganese Ores: Standards relating to the measurement of elements other than arsenic may be required for comprehensive ore assessment.
Keywords: manganese ore arsenic analysis, spectrometric determination of arsenic, chemical analysis standards, manganese concentrates testing, laboratory procedures for arsenic content, SIST ISO 317, ISO 317:2001 compliance, ore sample preparation, mining laboratory standards.
