相关实验视频

Updated: Jan 13, 2026

Separation and Identification of Conventional Microplastics from Farmland Soils

Separation and Identification of Conventional Microplastics from Farmland Soils

Published on: March 21, 2025

基于FTIR光谱学结合机器学习的初始和回收聚烯的识别

Zi-Wen Dong¹, Xue-Chao Song², Qin-Bao Lin¹

¹College of Packaging Engineering, Jinan University, Zhuhai, China.

Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment

|January 9, 2026

概括

这项研究引入了一种使用富里埃变换红外光谱法 (FTIR) 和机器学习来识别食品包装中的回收聚烯 (PP) 的新方法. 这有助于通过检测退化的材料来确保消费者的安全.

科学领域:

聚合物科学聚合物科学
分析化学是一种分析化学.
食品安全科学食品安全科学

背景情况:

聚烯 (PP) 的回收对于循环经济至关重要,特别是食品包装.
在回收过程中降解可能导致回收PP的化学泄露,造成健康风险.
区分回收和原始PP对于确保食品包装安全至关重要.

研究的目的:

开发一种新的方法来区分原始和回收聚烯 (PP).
评估与食品包装中的回收 PP 化学液相关的潜在人类健康风险.
确保食品包装材料的安全性和完整性.

主要方法:

使用富里埃变换红外光谱法 (FTIR) 进行材料分析.
应用数据处理技术,包括第一阶导数,主要组件分析 (PCA) 和正交部分最小平方差分分析 (OPLS-DA).
开发和评估机器学习模型,特别是随机森林 (RF) 模型,用于分类.

主要成果:

在使用经过处理的FTIR数据 (一级衍生品,PCA,OPLS-DA) 实现了对原始和回收 PP 的最佳区分.
随机森林 (RF) 模型表现出高性能,在训练组中准确率为98.6%,在测试组中准确率为86.1%.
曲线下的面积 (AUC) 达到0.963,表明可靠的歧视能力.

结论:

结合FTIR和机器学习的方法可靠地区分原始和回收 PP.
这种方法对于确保食品包装应用中回收 PP 的安全性至关重要.
该研究为回收塑料行业的质量控制提供了强有力的工具.

关键词:

福里埃变换红外光谱学 (FTIR) 技术回收聚烯的回收利用方法标识标识标识标识标识机器学习是机器学习.

更多相关视频

Sampling and Identification of Microplastics in Groundwater

Sampling and Identification of Microplastics in Groundwater

Published on: November 7, 2025

Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use

Sampling, Identification and Characterization of Microplastics Release from Polypropylene Baby Feeding Bottle during Daily Use

Published on: July 24, 2021

相关概念视频

IR Frequency Region: Fingerprint Region

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...

Types of Step-Growth Polymers: Polyesters

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...

UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Vis Spectroscopy: Woodward–Fieser Rules

UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π&VeryThinSpace;→&VeryThinSpace;π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the...

IR and UV–Vis Spectroscopy of Aldehydes and Ketones

IR and UV–Vis Spectroscopy of Aldehydes and Ketones

Infrared spectroscopy, also known as vibrational spectroscopy, is mainly used to determine the types of bonds and functional groups in molecules. In aldehydes and ketones, the carbonyl (C=O) bond shows an absorption around 1710 cm-1. The C=O bond vibration of an aldehyde occurs at lower frequencies than that of a ketone. In addition to the C=O absorption in an aldehyde, the aldehydic C–H bond also gives two peaks in the 2700–2800 cm-1 range. This absorption, coupled with the...

Classification of Titrimetric Analysis Based on Reaction Types

Classification of Titrimetric Analysis Based on Reaction Types

Titrimetric analysis in solution chemistry involves measuring the volume of solutions and is often called volumetric analysis. The standard solution of known concentration in the burette is called the titrant, whereas the solution of unknown concentration in the flask is called the analyte, or titrand. Titrimetric analyses can be classified into four types based on the reactions between the titrant and analyte.
Titrations between an acid and a base lead to neutralization reactions that form...

Polymer Classification: Stereospecificity

Polymer Classification: Stereospecificity

Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...