ASTM D7849-23 PDF

Overview

ASTM D7849-23: Standard Classification for Nomenclature of Reference Materials of Committee D24 is a key international standard developed by ASTM International. The standard provides comprehensive guidelines for the systematic naming of reference materials used in the testing and analysis of carbon black, as governed by ASTM Committee D24. These materials are essential for calibration, verification, and standardization of various carbon black test methods, ensuring accuracy, consistency, and reliability in laboratory results.

By establishing a clear nomenclature system, ASTM D7849-23 enables laboratories and industries to differentiate among a wide range of carbon black reference materials and track their respective versions. This consistency supports better communication, documentation, and traceability across global supply chains and technical communities.

Key Topics

• Standard Reference Materials (SRM): The standard defines and classifies several key reference material types relevant to carbon black testing, including:

  • SRB (Standard Reference Blacks): Sets of carbon black specimens with defined target values for multiple analytical properties.
  • ITRB (Industry Tint Reference Black): A standard reference for tint strength verification.
  • INR (Iodine Number Reference): Heat-treated blacks with stable iodine adsorption numbers.
  • IRB (Industry Reference Black): Widely used in rubber compounds testing.
  • STRM (Sulfur Test Reference Materials): References with known sulfur content for sulfur determination.
  • HNSA (High Nitrogen Surface Area): For testing samples with high nitrogen surface area.

• Nomenclature System: The document establishes a structured naming convention using standardized abbreviations (SRB, ITRB, INR, IRB, STRM, HNSA), set numbers, material designations (A, B, C, etc.), and lot identifiers. This ensures clear differentiation between materials and their versions.

• Differentiation of Versions: Procedures are described for identifying subsequent versions or lots of the same material, ensuring historic and quality traceability.

• Compliance and Safety: The standard notes that it does not address all safety or environmental issues. Users are responsible for appropriate safety, health, and environmental practices.

Applications

ASTM D7849-23 is highly relevant for industries and laboratories involved in:

• Carbon Black Manufacturing and Quality Control: Ensuring that testing for properties such as iodine adsorption, sulfur content, oil absorption, tint strength, and surface area is traceable to recognized reference materials.
• Rubber and Plastics Industry: Using Industry Reference Blacks (IRB) for performance evaluations in rubber compounds and in-rubber testing.
• Analytical Laboratories: Achieving precise calibration and verification of test equipment by referencing SRB, ITRB, INR, STRM, and HNSA materials.
• Research and Development: Supporting academic and industrial research requiring standardized reference points for comparative studies and method validation.
• Product Certification and Compliance: Facilitating consistent product certification processes across international markets by adhering to established nomenclature and reference materials.

Related Standards

ASTM D7849-23 references and supports several significant ASTM standards used for testing carbon black, including:

• ASTM D1510 - Test Method for Carbon Black - Iodine Adsorption Number
• ASTM D1619 - Test Methods for Carbon Black - Sulfur Content
• ASTM D2414 - Test Method for Carbon Black - Oil Absorption Number (OAN)
• ASTM D3265 - Test Method for Carbon Black - Tint Strength
• ASTM D3493 - Test Method for Carbon Black - Oil Absorption Number of Compressed Sample (COAN)
• ASTM D6556 - Test Method for Carbon Black - Total and External Surface Area by Nitrogen Adsorption
• ASTM D7854 - Test Method for Carbon Black - Void Volume at Mean Pressure

These referenced standards, when used in conjunction with ASTM D7849-23, promote rigorous quality assurance and testing reliability throughout the carbon black value chain.

Keywords: ASTM D7849-23, carbon black, reference materials, standard reference black, industry reference black, nomenclature, calibration, verification, sulfur test reference material, high nitrogen surface area, Committee D24, test method, quality control, laboratory standards.