Production of a spiked milk reference material

Area of Science:

• Nuclear Science and Technology
• Analytical Chemistry
• Metrology

Background:

• Accurate radioactivity measurements are crucial for nuclear safety and environmental monitoring.
• Standardized reference materials are essential for quality assurance in radiochemical analysis.
• Cesium isotopes (134Cs and 137Cs) are significant radionuclides of interest.

Purpose of the Study:

• To produce a spiked milk reference material containing 134Cs and 137Cs.
• To ensure the material's radioactivity characterization is traceable to national standards.
• To contribute to a broader project of creating reference materials across various densities.

Main Methods:

• Production of a milk matrix.
• Spiking the matrix with known activities of 134Cs and 137Cs.
• Characterization of radioactivity using methods traceable to national standards.

Main Results:

• Successful production of a milk reference material containing 134Cs and 137Cs.
• Radioactivity of the material has been characterized with traceability to national standards.
• The material is part of a larger EUROMET project for reference materials at densities from 0.1 to 2.0 g/cm3.

Conclusions:

• A reliable milk reference material for 134Cs and 137Cs has been established.
• Traceability to national standards ensures the accuracy and comparability of radioactivity measurements.
• This reference material will aid in inter-laboratory comparisons and method validation.