Why the aqueous phase is light red/light brown in RNA extraction after centrifugation step?

10 June 2024 0 7K Report

I am trying to extract RNA from blood sample using TRIzol reagent. I have added TRIzol to blood sample followed by chloroform. But after centrifugation, the aqueous phase is light red/light brown in color in some samples. What is the reason for this color?

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