A method for rapid detection of acidity in fermented milk

Abstract

The invention discloses a method for rapidly detecting the acidity in fermented milk. The method comprises the following steps of (1) collecting the fermented milk to serve as a calibration set sample, analyzing and detecting the calibration set sample to obtain an actual acidity measurement value of the calibration set sample, and establishing a basic database; carrying out near-infrared spectrumscanning on the calibration set sample synchronously, recording near-infrared spectrum data of the standard set sample, and establishing a near-infrared spectrum database; and enabling the acidity basic database to correspond to the near-infrared spectrum database, and building an acidity calibration model; (2) performing internal verification on the acidity calibration model by adopting a crossverification method; and (3) performing near-infrared spectrum scanning on a to-be-detected fermented milk sample to obtain near-infrared spectrum data, and importing the near-infrared spectrum data into the acidity calibration model, thereby obtaining an acidity prediction value of the to-be-detected fermented milk sample. The method has the advantages of being rapid, efficient, accurate, low incost, free of environmental pollution and the like, and can meet the high efficiency and timeliness requirements of online quality inspection of fermented milk products.

Description

technical field [0001] The invention belongs to food quality and safety testing, in particular to a method for rapidly detecting acidity in fermented milk, and more particularly to a method for rapidly detecting acidity in fermented milk based on near-infrared spectroscopy. Background technique [0002] Fermented milk refers to a product made from raw cow (goat) milk or milk powder, which is sterilized and fermented with a reduced pH value. Fermented milk is considered to be the most ideal carrier for lactic acid bacteria to be delivered to the human body. The lactose, galactose, lactic acid, lactic acid bacteria proliferation factors and active lactic acid bacteria contained in fermented milk can relieve lactose intolerance, resist oxidation, maintain the normal balance of intestinal flora, prevent and treat diarrhea, enhance immunity, and lower cholesterol. Health effect. [0003] The metabolic acid production of lactic acid bacteria is the cause of the increase in the a...

AI Technical Summary

Problems solved by technology

However, it is not yet known whether the near-infrared spectroscopy method can be used to detect the acidity in fermented milk and can meet the requirements of high efficiency and timeliness of online detection.

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