Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment

Yijian Sun; Jifen Wang

doi:10.3788/LOP202259.1600003

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 16 >Page 1600003 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 16, 1600003 (2022)

Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment

Yijian Sun and Jifen Wang^*

Author Affiliations

School of Investigation, People’s Public Security University of China, Beijing 100038, China

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DOI: 10.3788/LOP202259.1600003 Cite this Article Set citation alerts

Yijian Sun, Jifen Wang. Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment[J]. Laser & Optoelectronics Progress, 2022, 59(16): 1600003 Copy Citation Text

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Fig. 1. THz-TDs configured in transmission mode^[10]

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Fig. 2. Absorption spectra of trichlorfon with different contents in soil^[20]

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Fig. 3. Temperature-dependent absorption spectra of cocaine free base^[33]

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Fig. 4. Temperature-dependent absorption spectra of cocaine hydrochloride^[33]

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Fig. 5. Terahertz absorption spectra of RDX, PETN, and their mixture^[54]

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Target object	Pretreatment method	Method	Result	Reference
Cyfluthrin		SLR PLS LS-SVM PLS-LS-SVM	R=0.996 RMSEC is 0.546 RMSEV is 0.782	［17］
Imidacloprid and carbendazim in flour matrix	MSBC	Voigt-PLS PLS	RMSEC is 3.7382%	［20］
Trichlorfon in soil		PLS	R²>0.99304 RMSEC is less than 0.0219 RMSEP is less than 0.0246 RMSECV is less than 0.0286	［23］
Mixture of carbendazim and tomato powder	PCA	CFSFDP	Accuracy is 86%	［21］
Imidacloprid，carbendazim，fomediazine，dioxonitrile		MPGA-SVM	Accuracy is 100%	［24］
Nitrofen		BiPLS PLS MwPLS	RMSEP is 0.4064 R=0.9995	［25］
Chlorodifon，Dipterex		PCA SVM	Accuracy is 100%	［26］
Cyfluthrin		OLS ANN	Error is 1%	［16］

Table 1. Terahertz time-domain spectral processing methods and their applications in food detection

Drug	Characteristic absorption peak location /THz					Reference
Synthetic cannabinoid	1.27	2.20				［40］
Ketamine hydrochloride	1.16	1.31	1.52	1.94		［42］
MDMA	1.20	1.83	2.57			［43］
Methamphetamine	1.23	1.67	1.87			［44］
Cocaine hydrochloride	0.85	1.20	1.47	1.56	1.96	［44］
Codeine phosphate	0.81	1.01	1.25			［44］
Morphine	1.50	1.97				［44］
Pethidine hydrochloride	1.15	1.84				［44］
Heroin	1.89	2.42				［40］
N-（1-carbamoyl-2-Methyl propyl）-1-amyl indazole 3-formamide	1.15	1.96	2.40			［45］
N-（1-carbamoyl-2-methyl propyl）-1-（4-Fluorine benzyl）indazole-3-formamide	1.01	1.99				［45］
N-（1-carbamoyl-2-Methyl propyl）-1-（Cyclohexyl methyl）indazole-3-formamide	2.01					［45］
Ephedrine hydrochloride	1.26	1.96				［40］
Caffeine	1.30	1.49	1.64	1.96		［40］

Table 2. THz absorption spectra of 14 drugs

Yijian Sun, Jifen Wang. Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment[J]. Laser & Optoelectronics Progress, 2022, 59(16): 1600003

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