Nitrogen-Containing Compounds in Black Pepper Oil (Piper nigrum L.)

摘要

An investigation of nitrogen-containing compounds in black pepper oil,by capillary GC,GC/MS and HPLC techniques,revealed 20 previously unreported pyrazines,pyridines and piperidines.These species were found to be present at levels ranging from 150 ppb to 30 ppm.Odor assessment revealed that 2-ethyl-3,5-dimethylpyrazine (1.5 ppm) and 3-ethyl-2,5-dimethylpyrazine (490 ppb) contributed most significantly to the overall odor.