1 mM Fluorescein
in 10 mM NaOH
It fades with time, so check the concentration of the old stocks.
MW = 332
1mM = 0.332g/L = 0.033g/100 mL
A = Ecl
Molar extinction coefficient of fluorescein at 485nm = 50358/mol.cm
so Absorbance 10^-5M = 0.50358
(1/100 of a 1mM solution =10^-5M)
10mM NaOH
MW = ~40
10mM = 0.01M = 0.4g/L
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