| Issue |
2017
18th International Congress of Metrology
|
|
|---|---|---|
| Article Number | 10003 | |
| Number of page(s) | 7 | |
| Section | Metrology for health and better life / Métrologie, santé et confort de vie | |
| DOI | https://doi.org/10.1051/metrology/201710003 | |
| Published online | 18 September 2017 | |
Metrology of the vitamin-D-synthetic activity of UV lamps
1 Institute of Physics, National Academy of Sciences of Ukraine, 03028, Kiev, Ukraine
2 Laboratoire Ondes et Matiere d’Aquitaine, University of Bordeaux, CNRS, 33400, Talence, France
* Corresponding author: teren@iop.kiev.ua
Ultraviolet lamps are widely used in phototherapy, and positive health effect of UV irradiation is associated with the synthesis of vitamin D in human skin. Nevertheless, to avoid harmful effects of UV radiation a variety of commonly used broadband UV detectors have an output in erythema units. Therefore the measurement of the vitamin-D-synthetic capacity is a missing link in the metrology of UV lamps that are used for medical and/or cosmetic purposes. This paper presents original UV measuring device based on the same photoreaction in vitro by which vitamin D is synthesized in human skin via photo- and thermo- induced conversions of 7-Dehydrocholesterol (provitamin D3). Thus the targets for UV photons are provitamin D molecules embedded in specially designed UV transparent and stable matrix mimicking biological samples. Three operation modes of varying complexity are developed to follow the photoreaction course in real time.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.