咖啡中掺入黑玉米、大麦和巴西莓果粉的红外鉴别研究

Identification of coffee blended with black corn, barley and acai berry fruit powder with infrared spectroscopy

中文关键词:  红外光谱法  咖啡  黑玉米  大麦  巴西莓果粉  一致性检验

英文关键词:infrared spectroscopy  coffee  black corn  barley  acai berry fruit powder  conformity test

中文摘要:

      目的 建立判别模型快速有效筛查咖啡中是否掺入黑玉米、大麦和巴西莓果粉。方法 基于衰减全反射红外光谱法以及便携式红外光谱仪一致性检验原理, 采集咖啡、黑玉米、大麦和巴西莓果粉的红外漫反射光谱, 用OPUS软件建立咖啡一致性检验模型, 以咖啡样品红外光谱图为参考光谱, 以掺杂样品光谱图为验证光谱进行一致性检验分析。结果 利用该一致性检验模型能够准确区分咖啡中是否掺入一定量的黑玉米、大麦和巴西莓果粉。结论 本研究建立的检验模型简单、快速、有效, 为咖啡中掺入黑玉米、大麦和巴西莓果粉的鉴别提供了参考。

英文摘要:

      Objective To establish conformity test model for rapid and effective screening of coffee blended with black corn, barley and acai berry fruit powder. Methods Based on the attenuatted total reflection infrared spectroscopy and conformity test in the portable infrared spectrometer, the infrared diffuse reflection spectra of coffee, black corn, barley and acai berry fruit powder were collected, and the coffee conformity test model were established by the OPUS software, taking the infrared spectrum of coffee samples as the reference spectrum and the spectrum of the blended samples as validation spectrum. Results The coffee blended with a certain amount of black corn, barley and acai berry fruit powder could be accurately distinguished by the conformity test model. Conclusion The established model is simple, rapid and effective, which provides a reference for identification of the adulteration with black corn, barley and acai berry fruit powder in coffee.