In response to Margaret's question: >I have designed a student lab to illustrate the necessity for precautions >while handling hazardous material. I am after a (harmless) liquid reagent, >which looks unremarkable under room light, but will fluoresce under UV >light. The idea is that the students perform various manipulations, and at >the end, we shine UV light around to show them how much spillage they've >had, and how their books, faces etc are likely to be contaminated. I got >the idea from a radiactive safety video, but am having trouble finding a >suitable liquid. Any ideas? Don't ask me why I know this, but there is actually a company that sell such a product, in a kit form. It's called Glo Germ, and is used to demonstrate the importance of handwashing, etc. It is essentiall a liquid product, oil based I think, that contains little UV beads which illuminate with weak UV excitation. They have a pretty good web site at www.glogerm.com if you want more info. Hope this helps! Viki Mosiman
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