The European Commission’s (EC) Joint Research Centre (JRC) has made available a certified reference material (CRM) that ‘consists of a mixture of near-spherical silica nanoparticles of two distinct sizes in an aqueous solution’. The two sizes of sphere are ‘nominally 20nm and 80nm in diameter’.
Developed by the JRC’s Institute for Reference Materials and Measurements (IRMM), the CRM will ‘support toxicologists in studying and understanding the behaviour and fate of nanoparticles, [as] accurate characterisation of the nanoparticles’ physico-chemical properties is a fundamental requirement’. The material is said to be particularly ‘ideally suited to support the development of methods for the implementation of relevant EU legislation such as the EC’s Recommendation on the definition of ‘nanomaterial’’.
Characterisation was conducted using various measurements techniques; some of these included: dynamic light scattering; atomic force microscopy; and electron microscopy.
Follow this link to learn more, and this to read NIA’s latest reporting on the EC’s Recommendation of the definition of ‘nanomaterial’.