Dendrobium nobile mannose content detection method based on near infrared spectrum

The invention discloses a dendrobium nobile mannose content detection method based on a near infrared spectrum, and relates to the technical field of analysis. The detection method comprises the following steps: scanning by adopting a near infrared spectrum tester to obtain dendrobium nobile spectral data with a wave band range of 900-1700nm, screening an optimal spectrum pretreatment method and an optimal main factor number, and establishing a quantitative analysis model of the mannose content in a full wave band by combining a measured value and the spectral data obtained by a light pretreatment method and a partial least square method; and then selecting the dendrobium nobile samples in the verification set to evaluate the prediction accuracy of the model, and finally detecting the dendrobium nobile samples with unknown mannose content. According to the method, the content of the mannose in the dendrobium nobile can be rapidly, greenly and efficiently detected, a reference is provided for accurately evalua