ASTM E465-23 PDF

Overview

ASTM E465-23 is the international standard developed by ASTM for the determination of manganese (IV) in manganese ores using redox titrimetry. This standard specifies test methods for the quantitative measurement of manganese dioxide content, a key component used as a quality metric in manganese ores. The procedures described are essential for ensuring compliance with compositional specifications in various industrial and laboratory settings. The standard emphasizes proper laboratory practices, including safety, quality control, and accurate reporting using SI units.

Key Topics

• Scope of Application:

  • These test methods are designed for analyzing manganese dioxide levels typically found in manganese ore samples.
  • The results may be reported as either available oxygen or manganese dioxide content.

• Test Methods:

  • Test Method A (Ferrous Ammonium Sulfate Method):
    • Involves reacting the sample with ferrous ammonium sulfate and titrating the excess iron with potassium dichromate.
  • Test Method B (Sodium Oxalate Method):
    • Uses sodium oxalate and titration with potassium permanganate to determine excess oxalate.
  • Both methods are interchangeable and provide reliable results for manganese (IV) determination.

• Laboratory Practices:

  • Requires skilled analysts trained in chemical procedures and laboratory safety.
  • Calls for use of high-purity reagents and adherence to best quality control practices, such as those specified in ASTM E882.
  • The standard underscores the importance of proper waste management and regulatory compliance.

• Precision and Quality Control:

  • The methods outlined have demonstrated precision in interlaboratory studies.
  • Users are encouraged to utilize reference materials for method validation and bias assessment, ensuring reliable manganese dioxide analysis.

Applications

• Mining and Metallurgy:

  • Used in the quality assessment and grading of manganese ore for industrial processes.
  • Supports compliance with purchasing specifications and regulatory requirements for manganese oxide content.

• Quality Control Laboratories:

  • Essential for laboratories conducting routine analysis of ore compositions.
  • Enables reliable reporting of manganese dioxide concentrations to meet industry standards.

• Research and Development:

  • Valuable for research in geology and material science focusing on manganese ore characterization.
  • Supports method comparison and validation studies due to the inclusion of two alternative titrimetric procedures.

• Environmental and Regulatory Compliance:

  • Helps organizations demonstrate adherence to international trade and environmental regulations by establishing accurate material compositions.

Related Standards

For comprehensive chemical analysis and laboratory practices, ASTM E465-23 references several related standards, including:

• ASTM D1193: Specification for Reagent Water
• ASTM E29: Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• ASTM E50: Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
• ASTM E135: Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
• ASTM E882: Guide for Accountability and Quality Control in the Chemical Analysis Laboratory

Practical Value

ASTM E465-23 offers practical, standardized approaches for analyzing manganese dioxide content in ores. By following these methods, laboratories and industries can ensure product quality, regulatory compliance, and accuracy in the chemical composition of manganese ore. This standard is a critical resource for professionals involved in material testing, quality control, and compliance in the mining and metallurgical sectors.