基于太赫兹光谱的三聚氰胺定量分析

IF 1.6 4区物理与天体物理 Q3 OPTICS

光学学报 Pub Date : 2023-01-01 DOI:10.3788/aos230607

郭以恒 Guo Yiheng, 燕芳 Yan Fang, 赵渺钰 Zhao Miaoyu, 卓炫 Zhuo Xuan

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引用次数: 0

摘要

为实现对奶粉中非法食品添加剂三聚氰胺的精确定量检测，使用太赫兹时域光谱系统测定了三聚氰胺（质量分数梯度为0%~20%）与奶粉混合物的太赫兹吸收谱曲线。首先，利用主成分回归、支持向量机回归、偏最小二乘回归和最小二乘支持向量机回归（LSSVR）对混合物中三聚氰胺质量分数进行预测。结果显示，LSSVR的预测精度最高，预测集相关系数RP为0.99838，预测集均方根误差fRMSEP为0.41%。其次，为进一步提升LSSVR预测的精度，使用粒子群算法、遗传算法、布谷鸟算法、灰狼算法对LSSVR中正则化参数C和已确定核函数为高斯核函数后核参数γ进行参数优化。结果表明，经过4种算法优化后LSSVR预测精度均明显提高，其中经灰狼算法优化后的LSSVR对混合物中三聚氰胺的预测精度最高（RP为0.99925，fRMSEP为0.28%）。该算法可为食品添加剂的定量检测提供新的方法和思路。

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基于太赫兹光谱的三聚氰胺定量分析

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来源期刊

光学学报光学

CiteScore

2.80

自引率

37.50%

发文量

16537

期刊介绍： Researching is owned by Chinese Laser Press (CLP), which is established by Shanghai Institute of Optics and Fine Mechanics and Chinese Optical Society in 2009. Nowadays, CLP publishes 11 journals and manages three online platforms. Journal publishing activities include both traditional and digital models, and the first journal can be traced back to 1964. The CLP Online Library includes the CLP journals and partnered ones in China, and provides literature and intelligence services for users. The product platform, named as OEShow, connects sellers and buyers of optoelectronics products. Researching (formerly known as The CLP Publishing) is featured with stable operation and leading technology, collects CLP journals and partnered optics and photonics journals, and provides readers an optical publishing platform with global influence. CLP is on the way of building a modern publishing group combining traditional business and digital publishing.