I have a commercial instrument that measures and detects minute levels of
fluorescense. If you are using a GFP (Green Fluoresent Protein) in your
protein matrix my GFP-Meter will be able to detect down to the parts per
billion level. Other dyes and fluroescent markers can also be accomidated
with the instrument including; fluorescein, chlorophyll, Rhodamine. IF you
have not fluroescence going on then this method will not work. For
additional information please feel free to visit www.optisci.com or give me
a call at 603 883-4400. Thanks for your time.