ASTM C1163-14(2023) PDF

Overview

ASTM C1163-14(2023) – Standard Practice for Mounting Actinides for Alpha Spectrometry Using Neodymium Fluoride – establishes a reliable method for preparing actinide samples for alpha spectrometric analysis via neodymium fluoride coprecipitation. This practice is essential in numerous environmental and nuclear programs where the identification and quantification of alpha-emitting actinides are required. The coprecipitation technique enhances sample purity, speeds up preparation, and often increases recovery rates, while supporting accurate and high-resolution spectrometric measurements.

Key Topics

• Actinide Sample Preparation: Outlines procedures for mounting separated actinide fractions using neodymium fluoride coprecipitation instead of traditional electrodeposition. The method applies to actinides dissolvable in dilute hydrochloric acid.
• Alpha Spectrometry: Ensures deposits of sufficient quality for quantitative and qualitative analysis of alpha-emitting actinides, allowing precise measurement with high energy resolution.
• Rapid Mounting Technique: Offers a faster alternative to electrodeposition, with additional purification steps as only elements forming insoluble fluorides are co-precipitated.
• Enhanced Recovery and Resolution: Provides better recovery rates and comparable spectral resolution to electrodeposited samples; recoveries are often sufficient for survey applications even without tracers.
• Safety Considerations: Highlights use of hazardous chemicals such as hydrofluoric acid, mandating adherence to strict laboratory safety protocols due to severe health risks.

Applications

• Environmental Monitoring: Used extensively in environmental radioactivity testing programs to analyze actinide contamination in soil, water, and other media.
• Nuclear Safeguards and Research: Essential in nuclear fuel cycle management for precise actinide quantification, contributing to safeguards and proliferation resistance verification.
• Quality Assurance in Laboratory Practice: Beneficial for laboratories seeking faster throughput and reliable results when handling actinide separations, especially when prior chemistry precludes electrodeposition.
• Remounting Capability: If preparation issues arise (e.g., non-flat filters, sample loss) the sample and mount can be dissolved and re-prepared, increasing method robustness and reducing sample wastage.

Related Standards

• ASTM C1284: Standard Practice for Electrodeposition of the Actinides for Alpha Spectrometry – the traditional method referenced as an alternative.
• ASTM D3084: Practice for Alpha-Particle Spectrometry of Water – provides guidance on energy resolution and spectrometric methods.
• ASTM D1193: Specification for Reagent Water – defines water purity requirements for sample preparation.
• ASTM C859: Terminology Relating to Nuclear Materials – provides definitions relevant to actinide analysis and handling.

Practical Value

The adoption of ASTM C1163-14(2023) offers laboratories:

• Streamlined workflows for actinide alpha spectrometry with improved sample throughput.
• Flexibility in sample handling, including the ability to remount problematic samples.
• Enhanced purification during preparation, minimizing cross-contamination from interfering elements.
• High-quality alpha spectra with strong recovery, making it well-suited for both routine survey work and detailed quantitative analyses.

This standard supports consistency, repeatability, and international interoperability for anyone involved in actinide analysis by alpha spectrometry using neodymium fluoride mounting. For best outcomes, laboratories must implement robust safety practices, given the chemicals involved.

Keywords: actinides, alpha spectrometry, neodymium fluoride, sample preparation, alpha-emitting isotopes, environmental monitoring, nuclear analysis, ASTM C1163