title: UV spectrophotometric determination of piperine in pepper preparations: collaborative study.
abstract: Eight collaborating laboratories performed replicate analyses for piperine on 5 samples representing pepper raw spice, oleoresins, and soluble seasonings. Piperine is extracted into ethylene dichloride and measured at maximal absorbance 342-345 nm with a UV light source. Piperine content is calculated using an absorbance factor derived from piperine. Intralaboratory coefficients of variation (CVo) ranged from 0.5 to 3.1%; interlaboratory coefficients of variation (CVx) ranged from 3.0 to 5.8%. The method has been adopted as an official method of the American Spice Trade Association and as an official first action method by AOAC.
mesh_terms: D003212:Condiments / Q000032:analysis*; D010880:Piperidines / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D010880:Piperidines