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

New sixth generation MiniFlex X-ray diffractometer (XRD) is a multipurpose analytical instrument that can determine: phase identification and quantification, percent (%) crystallinity, crystallite size and strain, lattice parameter refinement, Rietveld refinement, and molecular structure. It is widely used in research, especially in material science and chemistry, as well as in industry for research and quality control. It is the newest addition to MiniFlex series of benchtop X-ray diffraction analyzers from Rigaku, which began with the introduction of the original MiniFlex system decades ago. Read more...

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