Contact your local Geology deparment and ask for a fluorescent thin section,
this will provide you with a good FL standard,
 
Robert Parsons
Carl Zeiss Canada
 
 
>Dear list,
>
>(I hope this is not too far off topic, but) we have looked mostly
>in vain for such standards, specifically "non-bleaching", inorganic,
>specimens suitable for 1/ routinely checking excitation level and for
>2/ correcting spatial uniformities of the optical/digital imaging system.
>
>Reports and handbooks describe the use of uranyl-glass and inorganic
>crystals, but the only commercial product we have found contains a
>1-2 mm circular fluorescing area of unknown composition, mounted on a
>microscope slide. Price: USD 1400 incl VAT. Expensive?
>
>A local contact makes Yttrium-Oxy-Sulfide crystals with several discrete
>emission/excitation bands for use in microspectrofluorimetry. However,
>the powder's granularity may preclude its use in de-calibrating
>pixel-to-pixel non-uniformities.
>
>Names, fax/phone-numbers and e-mail adresses of sources of such standards
>would be most helpful, perhaps to others as well.
>
>
>Thanks in advance -
>
>
>
>
>Finn-Mogens Haug
>
>Department of anatomy                   E-mail: [log in to unmask]
>Institute of basic medical sciences     Phone : +47 22 85 12 67
>University of Oslo                      Fax   : +47 22 85 12 78
>
>