Postnova Analytics has published a new application note that describes a new approach for analysis of titanium dioxide nanoparticles in commercial sunscreens.

The technique, which combines Inverse Supercritical Fluid Extraction (I-SFE) and Miniaturized Asymmetrical Flow Field-Flow Fractionation hyphenated with UV-Vis and MultiAngle Light Scattering (mAF4-UV-MALS) represents a promising tool for the verification of the nano-labelling of such products.

Due to the complexity of commercial sunscreen formulations, the determination of their nanoparticle content is usually very challenging and requires a tedious sample preparation step including the application of potentially hazardous organic chemicals.

The authors report on how 5 different commercial sunscreens were investigated for their nanoparticle content using I-SFE followed by mAF4-UV-MALS analysis.

Read more at azonano.com

Image Credit:  Shutterstock.com

News This Week

Innovations in Nanocomposites: A Future Outlook

Nanocomposites are a class of nanomaterials, where one or more nanostructured materials (organic/inorganic) are incorporated in metal, polymer, or ceramic to obtain a new material with many unique properties. Nanocomposites are applied in various [...]

New sensor detects ever smaller nanoparticles

Conventional microscopes produce enlarged images of small structures or objects with the help of light. Nanoparticles, however, are so small that they hardly absorb or scatter light and, hence, remain invisible. Optical resonators increase [...]