UV dosimeter based on dichloroindophenol and tin(IV) oxide

Andrew Mills, P. Grosshans

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A UVB specific dosimeter is described comprising: a redox dye (2,6-dichloroindophenol, DCIP), a semiconductor ( tin(IV) oxide, SnO2) and a sacrificial electron donor ( glycerol) dispersed in a polymer ( hydroxy ethyl cellulose, HEC) film. The dosimeter is blue in the absence of UVB light but rapidly loses colour on exposure to UVB light. The spectral characteristics of a typical UVB dosimeter film and the mechanism by which the colour change occurs are detailed. DCIP UVB dosimeter films exhibit a response that is related to the irradiance level and duration of UVB exposure, the level of SnO2 present and to a lesser extent the level of glycerol present. The response of the dosimeter appears to be independent of dye concentration and film thickness. Furthermore, DCIP UVB dosimeter films respond to solar simulated light, exhibiting a colour loss that can be simply related to the Minimal Erythemal Dose (MED) exposure for skin type II. As a consequence, such indicators have potential for measuring solar radiation exposure and providing an early warning of erythema for most Caucasian skin (i.e. skin type II).
Original languageEnglish
Pages (from-to)845-850
Number of pages6
JournalAnalyst
Volume134
Issue number5
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Electrochemistry
  • Spectroscopy
  • Environmental Chemistry

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