Showing contents of instant coffee in hot water

Guy P.A., Renouf M., Barron D., Cavin C., Dionisi F., Kochhar S., Rezzi S., Williamson G., Steiling H. (2009) Quantitative analysis of plasma caffeic and ferulic acid equivalents by liquid chromatography tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 877:3965-74 pubmed (19879819)