Qualitative analysis of sunscreen lotion

In the case of liquid samples, or samples comprised of fine powder, the sample surface must be covered in order to prevent solvent evaporation or scattering of fine particles. Two types of sunscreen lotion were measured by mounting a liquid sample holder to a benchtop X-ray diffractometer.

Measurements and Results

Fig. 1 shows a photo of the liquid sample holder filled with sunscreen lotion.
Fig. 1: Sunscreen lotion (left) and liquid sample holder filled with sunscreen lotion (right)

Fig. 2 shows qualitative analysis results for two types of sunscreen. The main component of both lotions is zinc oxide, but it is evident that the sunscreen lotion from Company A (PA+++) contains talc, and the sunscreen lotion from Company B (PA++++) contains titanium oxide.

Fig. 2: Qualitative analysis results on components contained in two types of sunscreen lotion

The fifth generation MiniFlex is a general purpose X-ray diffractometer that can perform qualitative and quantitative analysis of polycrystalline materials. The MiniFlex is available in two variations. Operating at 600 watts (X-ray tube), the MiniFlex 600 is twice as powerful as other benchtop models, enabling faster analysis and improved overall throughput. Running at 300 watts (X-ray tube), the new MiniFlex 300 does not require an external heat exchanger. Each model is engineered to maximize flexibility in a benchtop package. Read more...

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