On-line detection method for health-improving oral liquid

The invention belongs to the technical field of quality control of traditional Chinese herbal medicine oral liquids, and discloses an on-line detection method for a health-improving oral liquid. The on-line detection method comprises the following steps: establishing an optimal quantitative analysis model of quality index components of a health-improving oral liquid sample by adopting a near infrared spectrum together with a partial least squares method, and predicting quality indexes of the sample according to the optimal quantitative analysis model of the index components. The on-line detection method disclosed by the invention is simple and rapid to operate and high in accuracy, is capable of detecting the product quality in real time and achieving real-time on-line rapid testing on key quality control indexes of the health-improving oral liquid, and is economic and environment-friendly as the sample does not need to be pretreated in detection steps and is directly detected instead; the detection time is s