Anti-fade

Recipe for Anti-fade Mounting Medium

In our experience n-propyl gallate added to mounting media reduces fading of fluorescence from many different fluorophores during fluorescence microscopy. The following is a simple recipe for making an anti-fade mounting medium containing n-propyl gallate.

 Prepare a 10X PBS stock solution.
 Prepare a stock solution of 20%(w/v) n-propyl gallate (Sigma P3130) in dimethyl formamide or dimethyl sulfoxide. (Note: n-propyl gallate does not dissolve well in water-based solutions.)
 Thoroughly mix 1 part of 10X PBS with 9 parts of glycerol (ACS grade 99-100% purity) and slowly add 0.1 part 20% n-propyl gallate dropwise with rapid stirring.

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