Fecha de publicación: 17/12/2008 Fuente: WIPO "royal jelly" The invention provides an infrared spectrum evaluation method of the royal jelly freshness, which comprises the following steps: adding potassium bromide powder to a royal jelly sample to be measured, drying, grinding intensively, tablet-forming to prepare the sample, measuring the one-dimensional infrared spectrogram of the tablet sample, obtaining and plotting the corresponding second derivative spectrum, calculating the relative peak intensity of the characteristic spectrum of the one-dimensional infrared spectrum and the correlation coefficient of the one-dimensional infrared spectrum of the lately collected royal jelly, and determining the freshness of the royal jelly based on the difference between the one-dimensional infrared spectrum, the second derivative spectrum, the relative peak intensity and the correlation coefficient of the royal jelly sample to be measured and those of the lately collected royal jelly sample. The method can objectively reflects the effects of storage temperature and time on the quality and the freshness of the royal jelly sample; integrally, macroscopically and accurately evaluate the freshness of the royal jelly; and ensure a simple and rapid operation method, rare use of the chemical reagent and environment friendliness. The popularization and the utilization of the method can effectively monitor and control the quality of the royal jelly and promote the sound development of the royal jelly market.