Information on IC: Sunscreens

Fitting to the weather’s sunshine, let’s look into what IC can do to when it comes to sunscreens. Did you know that one of the active ingredients is Zinc oxide? As a powered mineral, it sits – after application of the sunscreen – on the outermost layer of the skin scattering, reflecting, and absorbing ultraviolet radiation. Zinc oxide is unique among sunscreen ingredients in that it is a broad-spectrum blocker, protecting from both UVA and UVB radiation. IC can be used to determine transition metals, and its use is suggested by the USP replacing older titration methods. The new method is based on an ion exchange separation followed by UV-detection after derivatization. In their application note (AN 72680) Hua and Jeff describe the method and its validation in great detail.

While you and I are familiar with IC, from time to time, I’d like to have some additional background information on MS. And that is the reason, why I would like to share a White Paper published by our colleague Debadeep Bhattacharyya talking about triple-quadrupole MS and Orbitrap-HRAMS, their similarities, differences, and capabilities. I truly enjoyed reading, and hope you will find it as nicely written, and informative as I did.


Dr. Detlef Jensen
EU Sales Support Expert for
Ion Chromatography and Environmental Market

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