Snaplight uses "cyalume"
>A Cyalume lightstick is made of a flexible plastic
tube containing a thin-walled glass tube. Inside the
glass tube is a solution of hydrogen peroxide, H2O2,
dissolved in a phthalic ester. Outside the glass tube
is a solution containing a phenyl oxalate ester and a
fluorescent dye. (In the yellow-green lightsticks the
dye is 9,10-bis(phenylethynyl)anthracene.) When the
lightstick is bent, the thin-walled glass tube breaks
and its contents mix with the solution outside. Then,
the H2O2 reacts with the phenyl oxalate ester...
(http://scifun.chem.wisc.edu/lightstick.html)<

I think the source of all these lightsticks may be
commercial fisherman.  They will use hundreds on a
long line of fishhooks to mark the line at night.

Wendell Grogan

--- "Aldo P. Solari [APS]" <aldo.solari@ho*.se*>
schrieb: > Dear senior divers,
> 
> The  chemistry dept. at this university has received
> a request to
> analyze    the   contents   of   some  torches 
> (brand  name  is
> "SnapLight").  These  torches  are  used  by  divers
>  and  thrown
> in-water after use.
> 
> Thousands  of  these  torches  are  showing up
> around Lanzarote's
> shores and this might be a dangerous waste.
> 
> I  would  thank,  anyone  of  you,  either 
> informing  me  on any
> composition  analyses done on these torches by any
> group. We have
> atomic absortion chromatographic analyzers here,
> however, we dont
> have  the  slightest  ideas  on the chemical
> compisition of these
> torches (there are at least 2 solutions which may
> contain H2O2 to
> allow  phosphoresence).  However,  the chemists dont
> know what to
> search  for  which  would make the analyses lengthy
> and extremely
> expensive.
> 
> If  there  is  anyone  who  could  point me to some
> info on these
> torches, it would be mostly appreciated.
> 
> Cheers,
> 
> aldo.solari@ho*.se*
> www.ccbb.ulpgc.es/fish-ecology/solaris
> ___
> 
> 
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> 
> 


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