ASTM D7574-23 PDF

Overview

ASTM D7574-23 is a standard test method developed by ASTM International for the detection and quantification of bisphenol A (BPA) in environmental waters using liquid chromatography/tandem mass spectrometry (LC/MS/MS). BPA is a widely produced industrial chemical used in the manufacture of polycarbonate plastics and epoxy resins, which are commonly found in consumer goods, electronics, automobile parts, food and drink containers, printed circuit boards, composites, coatings, adhesives, and more.

The standard is vital for ensuring accurate measurement of trace BPA levels in water samples, primarily surface water and treated effluents, supporting environmental monitoring and regulatory compliance.

Key Topics

• Significance of BPA Monitoring BPA enters the environment mainly through the degradation of polycarbonate plastics and resins. While it is not classified as bioaccumulative by the US Environmental Protection Agency, BPA is known to biodegrade and can be harmful to aquatic organisms at low concentrations.

• Applicability and Scope

  • This method is validated for surface waters, and secondary or tertiary publicly owned treatment works (POTW) effluent.
  • The standard has not been evaluated for marine waters or solid matrices.
  • Detection and reporting limits are set to ensure accurate trace analysis: the method detection limit (MDL) is 5 ng/L, with a reporting range of 20–600 ng/L.

• Test Method Summary

  1. Sample Preparation: Water samples are collected in pre-cleaned, BPA-free, amber glass bottles, acidified to pH 2, and stored at 0–6 °C.
  2. Solid Phase Extraction (SPE): BPA is extracted from water by adjusting the sample pH, passing it through an SPE cartridge, concentrating the eluate, and solvent exchange into methanol.
  3. Analysis by LC/MS/MS: Using LC paired with tandem mass spectrometry in multiple reaction monitoring (MRM) mode, BPA is separated and detected with high sensitivity and specificity.
  4. Calibration and Quality Control: The method requires calibration with standard solutions, use of internal and surrogate standards, and rigorous quality controls (including method blanks, laboratory control samples, and spike recoveries).

• Precision and Accuracy The standard includes criteria for calibration acceptance, method performance (recovery and precision), and procedures for initial demonstration of capability and ongoing quality checks to ensure data integrity.

Applications

• Environmental Monitoring:

  • Analysis of surface water and treated wastewater for regulatory and research purposes.
  • Tracking BPA contamination from consumer products, industrial discharges, or landfill leachates.

• Regulatory Compliance:

  • Supports assessment for compliance with environmental protection guidelines and standards for water quality.
  • Enables authorities and organizations to detect and report BPA concentrations at trace levels.

• Risk Assessment and Research:

  • Provides reliable data for evaluating the potential ecological and health impacts of BPA in aquatic environments.
  • Useful for studies on the fate and transport of BPA and related compounds in various water bodies.

• Quality Assurance in Laboratories:

  • Establishes procedures for consistent instrument calibration, quality control, and data validation in environmental testing laboratories.

Related Standards

• ASTM D1129: Terminology Relating to Water
• ASTM D1193: Specification for Reagent Water
• ASTM D2777: Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
• ASTM D3694: Practices for Preparation of Sample Containers and for Preservation of Organic Constituents
• ASTM D3856: Guide for Management Systems in Laboratories Engaged in Analysis of Water
• ASTM D5847: Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
• ASTM D5905: Practice for the Preparation of Substitute Wastewater

By following ASTM D7574-23, laboratories and environmental professionals are equipped with a robust, internationally recognized test method for precise quantification of bisphenol A in environmental water samples-contributing to improved water quality monitoring and environmental safety.