It would appear that if you search Google for your natural source material (blueberry, rose etc.) and the word "pigment" or "dye" you would find the chemical name for your pigment (you may have to choose one from a mixture). You then search for the name of your pigment and the words "extinction" or "absorbtion" and can probably find an extinction coefficient for your pigment.
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And so on ...
Oh yeah, I will have the photo images from this morning on the course webpage soon so keep an eye out for them.
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The images taken in the lab this morning are now available. They are on the course webpage at the URL:
http://www.abu.nb.ca/faculty/MSchriver/coursewebs/BI3203W07labweb.htm
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