Leaf chlorophyll extraction

[David Hershey]

A student observed that geranium leaves to be used for
starch testing decolored better in 50% isopropyl
alcohol than in 90%. The alcohol was heated in a
boiling water bath. All the other variables were the
same. 

Does anyone know why 50% alcohol would be better for
removing chlorophyll than 90% alcohol?


David R. Hershey

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