傅里叶变换红外光谱结合化学计量学的生物降解塑料袋鉴别分类  

Identification and Classification of Biodegradable Plastic Bags by Fourier Transform Infrared Spectroscopy Combined with Chemometrics

作　　者：陈壮 王云峰 俞文 郝丁成 CHEN Zhuang;WANG Yunfeng;YU Wen;HAO Dingcheng(Judicial Police Academy(Public Security Branch),Gansu University of Political Science and Law,Lanzhou,Gansu 730070,China;Institute of Evidence Law and Forensic Science,China University of Political Science and Law,Beijing 100080,China;School of Artificial Intelligence,Gansu University of Political Science and Law,Lanzhou,Gansu 730070,China;Xigu Branch of Lanzhou City Public Security Bureau of Gansu Province,Lanzhou,Gansu 730060,China)

机构地区：[1]甘肃政法大学,司法警察学院(公安分院),甘肃兰州730070 [2]中国政法大学,证据科学研究院,北京100080 [3]甘肃政法大学,人工智能学院,甘肃兰州730070 [4]甘肃省兰州市公安局西固分局,甘肃兰州730060

出　　处：《塑料》2024年第4期179-184,共6页Plastics

基　　金：甘肃省教育厅高校教师创新基金(2023A-100)。

摘　　要：建立生物降解塑料袋物证鉴别分类方法。以55个市售标称生物降解塑料袋样品为研究对象,利用傅里叶变换红外光谱采集样品光谱信息并进行重现性检验;分别建立主成分分析、聚类分析及判别分析的化学计量学生物降解塑料袋样品鉴别分类模型。结果表明,55个样品主要材质为聚己二酸-对苯二甲酸丁二醇酯及聚乙烯,填料以碳酸钙、滑石粉、淀粉为主,根据主要化学成分的不同,将样品分为5个类别,不同类别样品的主成分分析与聚类分析鉴别效果较好;基于判别分析鉴别分类,模型的样品原始分类准确率与留一法交叉验证分类准确率为100%。将傅里叶变换红外光谱与化学计量学相结合能快速鉴别分类生物降解塑料袋,为犯罪现场生物降解塑料袋物证鉴别分类提供有效方法。The method for identifying and classifying the evidence of biodegradable plastic bags was established.Using 55 biodegradable plastic bag samples as the research object,Fourier transform infrared spectroscopy was used to collect spectral information of the samples and perform reproducibility testing;The identification and classification models of biodegradable plastic bag samples were established by the principal component analysis,cluster analysis and discriminant analysis.The result showed that 55 samples were mainly made of polybutylene adipate terephthalate and polyethylene.The fillers were mainly calcium carbonate,talcum powder and starch.The samples were divided into five categories according to the main chemical composition,and the principal component analysis and cluster analysis of samples of different categories had good identification results.Establishing a discriminant analysis Model for sample classfcation,the accuracy of the original classification and the accuracy of the Leave-one-out cross validation classification were 100%。Fourier transform infrared spectroscopy combined with chemometrics could quickly identify and classify biodegradable plastic bags,providing an effective method for identification and classification of material evidence of biodegradable plastic bags at crime scenes.

关 键 词：傅里叶变换红外光谱 生物降解塑料袋 化学计量学 主成分分析 聚类分析 判别分析 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]