ASTM E507-21 PDF

Overview

ASTM E507-21: Standard Test Method for Determination of Aluminum in Iron Ores by Flame Atomic Absorption Spectrometry establishes a reliable laboratory procedure for quantifying aluminum content in iron ores, concentrates, and agglomerates. Developed by ASTM International, this test method covers aluminum measurement in the mass fraction range of 0.1% to 5% using flame atomic absorption spectrometry (FAAS). It is designed as a referee method, providing consistent results for compliance with compositional specifications regarding impurities in iron ores.

Laboratories using this standard must ensure their analysts have proper training and that all laboratory practices, safety, and environmental measures are met. Compliance with applicable quality control practices, such as those described in ASTM E882, is also emphasized.

Keywords: ASTM E507, aluminum determination, iron ores, flame atomic absorption spectrometry, impurity content, laboratory analysis

Key Topics

• Scope of Determination

  • Applicable to iron ores, concentrates, and agglomerates with 0.1–5% aluminum content by mass.
  • Utilizes SI units exclusively.

• Test Method Summary

  • The sample is decomposed and dissolved, and any insoluble residue is recovered and added back.
  • The solution is introduced to the flame of a nitrous oxide-acetylene burner.
  • Measurement of absorbed energy at the aluminum resonance line is carried out via atomic absorption spectrometry.
  • Calibration is performed against standard aluminum solutions to ensure accuracy.

• Quality and Interference

  • No interference from elements typically found in iron ores.
  • Method relies on properly calibrated and stable flame atomic absorption spectrometers.
  • Quality control and precision are established through referenced ASTM practices, particularly for analytical chemistry laboratories.

• Safety and Environmental Responsibility

  • Users must observe laboratory safety, health, and environmental practices.
  • Proper waste disposal and adherence to local regulations are required.

Applications

The ASTM E507-21 standard has direct practical value for laboratories and organizations involved in:

• Mining and Mineral Processing

  • Routine and referee analysis of raw iron ore materials, quality control of mined products, and assessment of processed ore batches.

• Metallurgical Operations

  • Compliance verification for impurity specifications before further processing or smelting.

• Materials Testing Laboratories

  • Providing accurate, repeatable measures of aluminum content in various iron ore samples for research and certification purposes.

• Regulatory and Contractual Compliance

  • Enabling iron ore suppliers and purchasers to certify shipments meet required compositional standards, reducing disputes and supporting transparent trade.

Using flame atomic absorption spectrometry in accordance with this standard ensures high sensitivity and selectivity for aluminum without significant influence from other ore constituents. The methodology supports both routine quality control and reference analysis, making it integral to any comprehensive iron ore analytics program.

Related Standards

Several ASTM standards support or complement the application of ASTM E507-21, including:

• ASTM D1193 - Specification for Reagent Water: Ensures purity of water used in testing.
• ASTM E29 - Practice for Using Significant Digits in Test Data: Guides data reporting and rounding practices.
• ASTM E50 - Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials: Addresses safety and apparatus protocols.
• ASTM E135 - Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials: Clarifies key terminology.
• ASTM E276 - Test Method for Particle Size or Screen Analysis: Relevant to sample preparation requirements.
• ASTM E882 - Guide for Accountability and Quality Control in the Chemical Analysis Laboratory: Supports comprehensive quality management.

Adherence to these related standards ensures method consistency, reliable results, and alignment with international best practices within iron ore analysis and analytical chemistry.