[Lab] UV measurement

[Nigel]

riskreactor.com has a good selection of Fluorescent pigments. Plain old highlighter pens work well too. You can break them open and squeeze out some liquid if you need more pigment. 

Nigel




On 2012-05-18, at 5:25 PM, Emily Daniels <emily.daniels at gmail.com> wrote:

> Thanks guys-
> 
> So I added Magnesium Carbonate (climber's chalk) as the fluorescent substance and from what I could find Magnesite is the most common form which does fluoresce, phosporesce and occasionally triboluminesce. The climber's chalk did not state it was from Magnesite, but "an athletic grade of natural carbonate of magnesia" with no additives. 
> 
> I added this to the piezoelectric salt mixture that I used in a previous experiment and when it sets I'll hook it up to some electricity and see what happens. I had a terrible time trying to locate other fluorescent materials around town- I was close to using baby powder at one point (Talc fluoresces) but chickened out due to the unknown "parfum" factor. If it doesn't work it's ok, but it would be neat to see if the piezoelectric salt is producing some kind of UV radiation.
> 
> Emily
> 
> On Fri, May 18, 2012 at 5:11 PM, Michael Ayukawa <mike.ayukawa at gmail.com> wrote:
> To just confirm you have a UV source I'd just start with one of these minerals:
> http://en.wikipedia.org/wiki/File:Fluorescent_minerals_hg.jpg
> 
> Looks like calcite is on the list.  So go find some chips of white marble from
> a gardening store or borrow some from a potted plant.
> 
> http://www1.newark.ohio-state.edu/Professional/OSU/Faculty/jstjohn/Zinc%20ore/Franklin-Marble.htm
> 
> /Mike
> 
> On 2012-05-18, at 5:02 PM, Paul & Andrea Mumby wrote:
> 
>> Something like this will detect UV, but it's an on/off type sensor (no "measurement")
>> http://www.seeedstudio.com/depot/uv-tron-driver-circuit-c10807-p-640.html?cPath=6
>> 
>> Certain types of phosphors will convert UV to visible light.
>> 
>> Also there are photosensitive papers that will react to UV (turning from black to white when exposed to UV for example)
>> such as: http://www.onlinesciencemall.com/sunart-paper-8x10-uv-sensitive-rayograph-paper-kit.html
>> 
>> Hope that helps :)
>> 
>> - Paul
>> 
>> On Fri, May 18, 2012 at 4:55 PM, Emily Daniels <emily.daniels at gmail.com> wrote:
>> Hi Labbers,
>> 
>> I may have already asked this group but does anyone have a way/device to measure ultraviolet (UVA/UVB/UVC) radiation and intensity/wavelengths? I may have just made something that gives off UV light but I'm not entirely sure. Any suggestions?
>> 
>> Emily
>> 
>> -- 
>> Emily Daniels | emilydaniels.com | @emdaniels | awesomefoundation.org
>> 
>> 
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> 
> 
> 
> -- 
> Emily Daniels | emilydaniels.com | @emdaniels | awesomefoundation.org
> 
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