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Special Reports Rubric : particle analytics

Rubrics : particle analytics - service provider
Solving analytical problems of customers based in biotechnology, polymer and particle science through the separation techniques of Field-Flow Fractionation FFF and Light Scattering DLS, the important techniques for the characterization of macromolecules and nanoparticles in solution


Analysis of Nanoparticles in Commercial Sunscreens

- a new approach for analysis of titanium dioxide nanoparticles in commercial sunscreens.-

July 2018

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. Nanoparticulate titanium dioxide identified via ICP-MS was found in three sunscreens which was in agreement with the nano-labelling in the respective ingredients lists.
The particle size distribution determined via MALS revealed particle sizes ranging from 50 nm to approximately 450 nm in diameter of gyration for all three samples. For the 2 sunscreens that were not nano-labelled, no nanoparticles were detectable.


Cosmetics - This research demonstrates
that the combination of i-SFE with mAF4-UV-MALS provides a powerful and efficient tool for the verification of the nanoparticle content of commercial sunscreens. Due to its robustness and wide applicability, this setup is not limited to the analysis of sunscreens but may also be a helpful tool for the investigation of nanoparticle-containing cosmetics in general.

Further information
To download a copy of the application note please visit http://www.postnova.com/application-note/view/44.html. For further information please contact Postnova Analytics on +49-8191-985-6880 / +44-1885-475007 / +1-801-521-2004 /info@postnova.com

Postnova Analytics

Founded in 1997, Postnova Analytics is the inventor and leading international supplier of Field-Flow Fractionation (FFF) systems for markets including biopharmaceuticals, polymers, materials, nanotechnology and environmental sciences. Leveraging its unique and patented modular FFF - Light Scattering Platform, Postnova has been able to provide high performance solutions to a wide range of applications. Today the company's growing product portfolio includes Flow FFF, Centrifugal FFF, Thermal FFF, Size Exclusion Chromatography (SEC), MALS and DLS Light Scattering.  Postnova (www.postnova.com) is located and headquartered in Landsberg am Lech (Germany) and has subsidiaries in the USA, UK and Finland. These offices in conjunction with a highly qualified and trained distribution network provides informed local support to customers worldwide.

Worldwide HQ 

Postnova Analytics GmbH

Max-Planck-Straße 14
86899 Landsberg am Lech

Tel:     +49-8191-985-6880
Email: info@postnova.com 
Web    www.postnova.com


Postnova Analytics UK Ltd.
Unit 56, The Hop Store
Bishops Frome

Tel:    +44-1885-475007
Email: info.uk@postnova.com 
Web    www.postnova.com




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