近红外光谱技术对银杏喷干粉中水分和粒径的检测研究

Determination of Moisture and Particle Size in Ginkgo Spray Dry Powder by Near Infrared Spectroscopy

目的:建立近红外光谱法快速检测银杏喷干粉中水分和粒径的方法。方法:利用近红外光谱仪对喷干粉样品进行扫描,对其光谱进行预处理和波段选择,并结合偏最小二乘法(partial least squares, PLS)建立水分和粒径快速无损检测方法。结果:所建立的模型的决定系数R分别为0.9741和0.9556,交叉验证均方根差值分别为0.072和0.00219,对验证集样品进行预测并统计分析,预测值与真实值之间无显著差异(P > 0.05)。结论:所建立的模型准确度高,适用于银杏喷干粉中水分和粒径的快速检测。

Objective: To establish a method for rapid determination of water content and particle size in ginkgo spray dry powder by near infrared spectroscopy. Methods: The near-infrared spectroscopy (NIR) was used to scan the dry powder samples, and the spectra were pretreated and the bands were selected. A fast and nondestructive method for the determination of water content and particle size was established by partial least squares (PLS) method. Results: The determination coefficients R of the established model were 0.9741 and 0.9556, and the root mean square differences of cross-validation were 0.072 and 0.00219. There was no significant difference between the predicted value and the true value (P > 0.05) after the prediction and statistical analysis of the validation set samples. Conclusion: The established model has high accuracy and is suitable for the rapid determination of water content and particle size in ginkgo spray dry powder.