利用数字比色法和傅立叶变换近红外光谱仪检测和鉴别淀粉和面粉掺假

IF 1 4区 化学 Q4 CHEMISTRY, ANALYTICAL Journal of Analytical Chemistry Pub Date : 2024-11-01 DOI:10.1134/S1061934824700916
V. G. Amelin, O. E. Emel’yanov, Z. A. Ch. Shogah, A. V. Tret’yakov
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引用次数: 0

摘要

通过 LED 对紫外线和红外线辐射的漫反射,提出了一种用于识别和检测各类淀粉和面粉掺假的比色装置。使用安装了 PhotoMetrix PRO、ColorGrab 和 RGBer 应用程序的 OnePlus 10 Pro 和 iPhone 14 智能手机上的摄像头测定了样品的颜色特征(RGB 通道值)。近红外光谱(4000-10 000 cm-1)由傅立叶变换红外光谱仪记录。包括 TQ Analyst 9、The Unscrambler X 和 XLSTAT 在内的专业软件包处理了色度和光谱特征数据集。识别特征包括主成分分析和分层聚类分析中不同类型淀粉和面粉的聚类模式。确定了检测样品掺假质量的最佳波长:对于淀粉,同时使用所有 LED(365、390、850 和 880 nm);对于面粉,使用波长为 365 和 390 nm 的 LED。通过 F1 成分与淀粉或面粉中添加的外来物质的质量分数的关系图,对定性掺假进行了评估。傅立叶变换红外光谱法在近红外区域证实了比色法的有效性。
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Detection and Identification of Starch and Flour Adulteration by Digital Colorimetry and Fourier-Transform Near-IR Spectroscopy

A colorimetric device is proposed for identifying and detecting the adulteration of various types of starch and flour by diffuse reflection of UV and IR radiation from LEDs. The color characteristics of the samples (RGB channel values) were determined using cameras on OnePlus 10 Pro and iPhone 14 smartphones with installed applications PhotoMetrix PRO, ColorGrab, and RGBer. Near-infrared spectra (4000–10 000 cm–1) were recorded on a Fourier-transform infrared spectrometer. Specialized software packages, including TQ Analyst 9, The Unscrambler X, and XLSTAT, processed the dataset of colorimetric and spectral characteristics. The identification features included clustering patterns for different types of starch and flour in principal component analysis and hierarchical cluster analysis. Optimal wavelengths for determining the quality of adulteration of the tested samples were identified: for starch, the simultaneous use of all LEDs (365, 390, 850, and 880 nm); for flour, LEDs with wavelengths of 365 and 390 nm. The qualitative adulteration was assessed using graphs of the dependence of the F1 component on the mass fraction of the added foreign substance in the starch or flour. The effectiveness of the colorimetric method was confirmed by Fourier-transform infrared spectroscopy in the near-infrared region.

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来源期刊
Journal of Analytical Chemistry
Journal of Analytical Chemistry 化学-分析化学
CiteScore
2.10
自引率
9.10%
发文量
146
审稿时长
13 months
期刊介绍: The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.
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