Measurement of contaminant removal from skin using a portable fluorescence scanning system
Autor: | Jørn Roed, S. Cleary, H. Hession, Miriam Byrne, Kasper Grann Andersson |
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Rok vydání: | 2006 |
Předmět: |
Male
Movement Health Toxicology and Mutagenesis Human skin Radiation Dosage Fluorescence Fluorescence spectroscopy Optics Humans Environmental Chemistry Particle Size Waste Management and Disposal Skin Aerosols Detection limit Air Pollutants business.industry Chemistry General Medicine Silicon Dioxide Pollution Rubbing Particle Female Skin effect Particle size business Fluorescein-5-isothiocyanate Locomotion Environmental Monitoring Hair |
Zdroj: | Journal of Environmental Radioactivity. 85:196-204 |
ISSN: | 0265-931X |
Popis: | The residence time of particulate contamination on the human body is a factor that has an important impact on the accuracy of exposure assessment in the aftermath of an accidental release of radionuclides to the atmosphere. Measurements of particle clearance from human skin were made using an illumination system to excite fluorescence in labelled silica particles and a CCD camera and image processing system to detect this fluorescence. The illumination system consists of high-intensity light emitting diodes (LEDS) of suitable wavelengths arranged on a portable stand. The physically small size of the LEDs allows them to be positioned close to the fluorescing surface, thus maximising the fluorescent signal that can be obtained. The limit of detection was found to be 50 μg of tracer particle per cm 2 . Experiments were carried out to determine the clearance rates of 10 μm and 3 μm particles from the skin. Results show that, in the absence of any mechanical rubbing of the skin, the clearance of particles from the skin followed an approximately exponential decay with a half-time of 1.5–7.8 h. Skin hairiness and degree of human movement were found, in addition to particle size, to have an important influence on particle fall-off rate. |
Databáze: | OpenAIRE |
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