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Back to products - SMF 3:
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Fluorescence Measurements |
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The personnel to be monitored
sit inside a dodecahedron of UV lights which cause the tracer to fluoresce
and a video camera equipped with an appropriate filter records the
fluorescence. A second image is taken using a high speed flash gun
with a special filter.
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Image and Data Processing |
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The two images from the fluorescence
measurement are used to resolve the curvature of the surface of the
subject. This then allows precise quantitation of the tracer and hence
excellent analytical accuracy. Image processing software allows part
or all of the area of the image on a PC screen to be selected. This
then quantifies the amount of tracer and thus the quantity of the
chemical or surrogate on the person. By photographing the operative
in several positions the total body contamination may be quantified.
Alternatively, selected areas such as the face or hands may be quantified.
The images are numbered and stored on the hard disk for future use.
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Sensitivity and linearity |
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The SMF 3 Surface Monitoring
Fluorimeter operates with great sensitivity and measures down to nanogram
per square cm levels. It has been validated against biological monitoring
studies on pesticides with excellent correlation and has been used
for both aqueous and hydrocarbon based formulations.
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Portable Laboratories |
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A self-contained version
of the SMF 3 Surface Monitoring Fluorimeter has been built. A dark-room
constructed in a two meter by three point eight meter trailer allows
the entire system to be made portable, so that it is available for
work in the field. The image processor runs from a caravan battery
and invertor, while the dodecahedron lights are powered direct from
a generator.
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Copyright © 2003 Safe
Training Systems Ltd. |
