Visualization of Thiourea in Bulk Milk Powder Based on Portable Raman Hyperspectral Imaging Technology On-Site Rapid Detection Method Research

Qiao-ling YANG; Qin CHEN; Bing NIU; Xiao-jun DENG; Jin-ge MA; Shu-qing GU; Yong-ai YU; De-hua GUO; Feng ZHANG

doi:10.3964/j.issn.1000-0593(2022)07-2156-07

Journals >Spectroscopy and Spectral Analysis >Volume 42 >Issue 7 >Page 2156 > Article

Spectroscopy and Spectral Analysis
Vol. 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

Qiao-ling YANG^1、*, Qin CHEN^2、2;, Bing NIU^2、2;, Xiao-jun DENG^{3、3; *;}, Jin-ge MA^3、3;, Shu-qing GU^3、3;, Yong-ai YU^4、4;, De-hua GUO^3、3;, and Feng ZHANG^5、5;

Author Affiliations

¹1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China

²2. School of Life Sciences, Shanghai University, Shanghai 200444, China

³3. Technical Center for Animal Plant and Food Inspection and Quarantine, Shanghai Customs, Shanghai 200135, China

⁴4. Shanghai Oceanhood Opto-Electronics Tech. Co., Ltd., Shanghai 201201, China

⁵5. Chinese Academy of Inspection and Quarantine, Beijing 100176, China

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DOI: 10.3964/j.issn.1000-0593(2022)07-2156-07 Cite this Article

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 Copy Citation Text

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Fig. 1. Schematic diagram of point scanning two-dimensional Raman spectroscopy imaging system

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Schematic diagram of sample preparation(a): Mold drawing required for double-layer sample;(b1): Double-layer sample drawing; (b2): Mixed sample drawing

Fig. 2. Schematic diagram of sample preparation
(a): Mold drawing required for double-layer sample;(b1): Double-layer sample drawing; (b2): Mixed sample drawing

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Fig. 3. Raman spectra of thiourea and milk powder under different integration time and laser power

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Fig. 4. Raman spectra of double-layer samples with different milk powder thickness (n=3)

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Fig. 5. Binary images of double-layer samples with different milk powder thickness (n=3)

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Fig. 6. Binary heat map of mixed sample of thiourea milk powder (n=6)

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Fig. 7. Linear fitting graph of thiourea concentration and the number of pixels

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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
	0.25	实测浓度	0.24	0.26	0.24	0.26	0.24	0.24	0.25	-2.66~4.01	3.46
	0.60	检测点数	26	27	29	27	26	28	0.58	-6.63~1.71	3.36
	0.60	实测浓度	0.56	0.58	0.61	0.58	0.56	0.59	0.58	-6.63~1.71	3.36
	1.20	检测点数	63	65	63	64	65	63	1.19	-1.89~0.89	1.38
	1.20	实测浓度	1.18	1.21	1.18	1.19	1.21	1.18	1.19	-1.89~0.89	1.38
	1.50	检测点数	81	83	80	83	80	82	1.49	-2.61~0.72	1.55
	1.50	实测浓度	1.48	1.51	1.46	1.51	1.46	1.49	1.49	-2.61~0.72	1.55
品牌2	0.25	检测点数	6	7	6	8	6	7	0.24	-9.33~4.01	5.73
	0.25	实测浓度	0.23	0.24	0.23	0.26	0.23	0.24	0.24	-9.33~4.01	5.73
	0.60	检测点数	25	26	25	27	26	25	0.55	-9.41~ -3.85	2.45
	0.60	实测浓度	0.54	0.56	0.54	0.58	0.56	0.54	0.55	-9.41~ -3.85	2.45
	1.20	检测点数	62	63	62	61	63	64	1.17	-4.67~ -0.05	1.50
	1.20	实测浓度	1.16	1.18	1.16	1.14	1.18	1.19	1.17	-4.67~ -0.05	1.50
	1.50	检测点数	80	79	81	82	80	81	1.47	-3.73~ -0.39	1.19
	1.50	实测浓度	1.46	1.44	1.48	1.49	1.46	1.48	1.47	-3.73~ -0.39	1.19
品牌3	0.25	检测点数	6	7	8	7	6	8	0.24	-9.33~4.01	6.13
	0.25	实测浓度	0.23	0.24	0.26	0.24	0.23	0.26	0.24	-9.33~4.01	6.13
	0.60	检测点数	26	27	28	26	27	25	0.57	-9.41~ -1.07	3.08
	0.60	实测浓度	0.56	0.58	0.59	0.55	0.58	0.54	0.57	-9.41~ -1.07	3.08
	1.20	检测点数	63	64	62	63	64	65	1.19	-3.28~0.89	1.48
	1.20	实测浓度	1.18	1.19	1.16	1.18	1.19	1.21	1.19	-3.28~0.89	1.48
	1.50	检测点数	82	80	81	83	82	80	1.48	-2.61~0.72	1.36
	1.50	实测浓度	1.49	1.46	1.48	1.51	1.49	1.46	1.48	-2.61~0.72	1.36

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