Spectroscopy and Spectral Analysis, Volume. 42, Issue 7, 2156(2022)
Visualization of Thiourea in Bulk Milk Powder Based on Portable Raman Hyperspectral Imaging Technology On-Site Rapid Detection Method Research
Figures & Tables(8)
Fig. 1. Schematic diagram of point scanning two-dimensional Raman spectroscopy imaging system
Fig. 2. Schematic diagram of sample preparation
(a): Mold drawing required for double-layer sample;(b1): Double-layer sample drawing; (b2): Mixed sample drawing
Fig. 3. Raman spectra of thiourea and milk powder under different integration time and laser power
Fig. 4. Raman spectra of double-layer samples with different milk powder thickness (
Fig. 5. Binary images of double-layer samples with different milk powder thickness (
Fig. 6. Binary heat map of mixed sample of thiourea milk powder (
Fig. 7. Linear fitting graph of thiourea concentration and the number of pixels
Table 1. Methodaccuracy verification form
View tableView in ArticleTable 1. Methodaccuracy verification form
样本 添加浓度
(W/W, %)测量值 平均值/
(mg·kg-1)相对误差
范围/%RSD/
%品牌1 0.25 检测点数 7 8 7 8 7 7 0.25 -2.66~4.01 3.46 实测浓度 0.24 0.26 0.24 0.26 0.24 0.24 0.60 检测点数 26 27 29 27 26 28 0.58 -6.63~1.71 3.36 实测浓度 0.56 0.58 0.61 0.58 0.56 0.59 1.20 检测点数 63 65 63 64 65 63 1.19 -1.89~0.89 1.38 实测浓度 1.18 1.21 1.18 1.19 1.21 1.18 1.50 检测点数 81 83 80 83 80 82 1.49 -2.61~0.72 1.55 实测浓度 1.48 1.51 1.46 1.51 1.46 1.49 品牌2 0.25 检测点数 6 7 6 8 6 7 0.24 -9.33~4.01 5.73 实测浓度 0.23 0.24 0.23 0.26 0.23 0.24 0.60 检测点数 25 26 25 27 26 25 0.55 -9.41~ -3.85 2.45 实测浓度 0.54 0.56 0.54 0.58 0.56 0.54 1.20 检测点数 62 63 62 61 63 64 1.17 -4.67~ -0.05 1.50 实测浓度 1.16 1.18 1.16 1.14 1.18 1.19 1.50 检测点数 80 79 81 82 80 81 1.47 -3.73~ -0.39 1.19 实测浓度 1.46 1.44 1.48 1.49 1.46 1.48 品牌3 0.25 检测点数 6 7 8 7 6 8 0.24 -9.33~4.01 6.13 实测浓度 0.23 0.24 0.26 0.24 0.23 0.26 0.60 检测点数 26 27 28 26 27 25 0.57 -9.41~ -1.07 3.08 实测浓度 0.56 0.58 0.59 0.55 0.58 0.54 1.20 检测点数 63 64 62 63 64 65 1.19 -3.28~0.89 1.48 实测浓度 1.18 1.19 1.16 1.18 1.19 1.21 1.50 检测点数 82 80 81 83 82 80 1.48 -2.61~0.72 1.36 实测浓度 1.49 1.46 1.48 1.51 1.49 1.46
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Qiao-ling YANG, Qin CHEN, Bing NIU, Xiao-jun DENG, Jin-ge MA, Shu-qing GU, Yong-ai YU, De-hua GUO, Feng ZHANG. Visualization of Thiourea in Bulk Milk Powder Based on Portable Raman Hyperspectral Imaging Technology On-Site Rapid Detection Method Research[J]. Spectroscopy and Spectral Analysis, 2022, 42(7): 2156
Paper Information
Category: Orginal Article
Received: May. 24, 2021
Accepted: --
Published Online: Nov. 16, 2022
The Author Email: YANG Qiao-ling (yangqiaoling@shu.edu.cn)
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