How can I analyze Gentian violet (Crystal violet)?

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Ali Raza

You can go for HPLC (qual/quan), FTIR (qual.), Raman (qual) or SERS (qual/quan) or Fluorescence (qual/quan).

Mohamed Hammad

Semi-quantitative analysis of gentian violet by surface-enhanced Raman spectroscopy using silver colloids

http://www.ncbi.nlm.nih.gov/pubmed/21073801

Willibald Stumptner

I also recommend RAMAN - you should find such a spectrometer in almost any university. Manufacturers: Perkin Elmer, Kaiser Optics etc. There is also quite a bit of literature about Crystal violet RAMAN measurements e.g.

http://www.ncbi.nlm.nih.gov/pubmed/21348518