Laser & Optoelectronics Progress, Volume. 59, Issue 16, 1600003(2022)
Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment
Figures & Tables(7)
![THz-TDs configured in transmission mode[10]](/Images/icon/loading.gif){kind=icon}
Table 1. Terahertz time-domain spectral processing methods and their applications in food detection
View tableTable 1. Terahertz time-domain spectral processing methods and their applications in food detection
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 2. THz absorption spectra of 14 drugs
View tableTable 2. THz absorption spectra of 14 drugs
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 ］
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Yijian Sun, Jifen Wang. Research Progress of Terahertz Time-Domain Spectroscopy in Food, Drugs, and Environment[J]. Laser & Optoelectronics Progress, 2022, 59(16): 1600003
Paper Information
Category: Reviews
Received: Jun. 2, 2021
Accepted: Jul. 5, 2021
Published Online: Jul. 22, 2022
The Author Email: Jifen Wang (wangjifen58@126.com)
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