ASTM D8402-23 PDF

Overview

ASTM D8402-23 is an international standard developed by ASTM International, titled “Standard Practice for Development of Microplastic Reference Samples for Calibration and Proficiency Evaluation in All Types of Water Matrices with High to Low Levels of Suspended Solids.” This standard outlines laboratory procedures for generating microplastic particles from common polymers and preparing microplastic reference samples. These reference materials are significant for calibrating analytical methods, supporting proficiency testing, and providing quality assurance in microplastic detection and quantification, especially in water samples containing varying concentrations of suspended solids.

ASTM D8402-23 plays a critical role in strengthening the reliability of environmental monitoring for microplastics in drinking water, wastewater, and natural aquatic environments.

Key Topics

• Generation of Microplastic Particles: The document specifies methods to grind polymer pellets such as PVC, PE, PP, PS, and PET into irregularly-shaped microplastic particles of various sizes, simulating particles found in natural environments.
• Sample Preparation for Calibration: Guidance covers preparing both count-based and mass-based microplastic reference samples to calibrate and assess performance of collection, preparation, and identification methods.
• Applicable Polymer Types: Utilizes common, dye-free, and additive-free polymers to minimize analytical biases.
• Quality Control: Details best practices for documenting reference samples, ensuring transfer efficiency, and addressing sample homogeneity and measurement variability.
• Waste Management and Safety: Emphasizes compliance with local regulations for manufacturing and disposal, and establishing safety and environmental protocols for handling microplastics and laboratory waste.
• Analytical Instrumentation: References equipment and procedures including grinders, sonicators, microscopes, and analytical balances for producing and analyzing microplastic samples.

Applications

ASTM D8402-23 delivers practical value for organizations and laboratories involved in microplastic analysis in water and environmental samples:

• Method Validation and Calibration: Enables laboratories to evaluate and calibrate detection instruments, such as spectroscopy or mass-based analysis systems (e.g., IR, Raman, Pyr-GC/MS), under realistic environmental conditions.
• Proficiency Testing: Facilitates interlaboratory comparisons and proficiency evaluations, thereby supporting harmonized data quality in microplastic monitoring.
• Environmental Monitoring: Supports estimation of microplastic concentrations in varied water matrices-including low to high turbidity environments-by providing standardized reference samples.
• Risk and Degradation Assessments: Assists in investigating microplastic particle degradation, ingestion, and associated food safety and human health risks.
• Regulatory Compliance and Research: Assists compliance with international standards and quality control expectations in research, policy development, and environmental reporting related to microplastics.

Related Standards

ASTM D8402-23 references several key standards essential for microplastics analysis and sample preparation:

• ASTM D883: Terminology Relating to Plastics
• ASTM D1193: Specification for Reagent Water
• ASTM D1921: Test Methods for Particle Size (Sieve Analysis) of Plastic Materials
• ASTM D5905: Practice for Preparation of Substitute Wastewater
• ASTM D8333: Practice for Preparation of Water Samples for Identification and Quantification of Microplastic Particles and Fibers
• ISO 8573-1:2010: Compressed Air - Part 1: Contaminants and Purity Classes

Summary

Deploying ASTM D8402-23 ensures reliable, harmonized, and reproducible production of microplastic reference samples for environmental laboratories worldwide. With increasing attention on microplastic contamination in water, this standard is foundational for supporting regulatory compliance, interlaboratory calibration, and advancing microplastic research across all water matrices.

Relevant keywords: microplastic reference samples, calibration, proficiency testing, environmental water analysis, microplastic contamination, water matrices, laboratory standards, particle preparation, analytical quality assurance, method validation, suspended solids, drinking water, wastewater, polymers, environmental monitoring, quality control, standardization.