Determination of kavalactones in dried kava (Piper methysticum) powder using near-infrared reflectance spectroscopy and partial least-squares regression.
Gautz LD, Kaufusi P, Jackson MC, Bittenbender HC, Tang CS. Determination of kavalactones in dried kava (Piper methysticum) powder using near-infrared reflectance spectroscopy and partial least-squares regression. J Agric Food Chem. 2006 Aug 23; 54(17):6147-52.