Study of the Rapid Identification Method of Coffee Adulteration Based on Near-infrared Spectroscopy
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Abstract:
The near infrared spectroscopy combined with adulterant screen algorithm was used to establish coffee fast identification method in this word. The near infrared spectrometer was used to collect coffee spectral data, the spectral database of standard samples (material spectrum), the spectral data of adulterants, and then to establish the spectral database of adulterants. The classification model and adulterant model of coffee were established. The Adulterant Screen was used to analyze the principal components of the model and composition of adulteration, and then to establish a coffee adulteration fast identification model. The method can be used to identify adulterated coffee containing 2, 5, 10, 15, 20, 30 and 40 percent of Brazil berry fruit power. It can be also used to identify adulterated coffee containing 5, 10, 15, 20, 30 and 40 percent of barley. The lowest identified concentrations of adulterated acai and barley in coffee were 2% and 5%, respectively. The near infrared spectroscopy combined with Adulterant Screen algorithm based fast identification model can identify coffee in adulteration, such as brazil berry fruit powder and barley. It provides a fast, reliable and nondestructive testing method for the adulteration identification of coffee samples. It can be used in routine testing of coffee sample adulteration.
