The application of terahertz spectroscopy to liquid petrochemicals detection: A review

Yin, Ming; Tang, Shoufeng; Tong, Minman

doi:10.1080/05704928.2016.1141291

Cited by 57 publications

(25 citation statements)

References 95 publications

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“…Previous studies reviewed some early applications of THz technology in agriculture and food (Gowen, O'Sullivan, & O'Donnell, 2012;Qin, Ying, & Xie, 2013;Wang et al, 2017;Xie et al, 2014). However, there is no detailed publication available for THz-specific food applications.…”

Section: Wavelength (In Meters)mentioning

confidence: 99%

“…The far-infrared or terahertz (THz) region refers to a very small gap between the microwave (MW) and infrared (IR) regions of the electromagnetic spectrum. THz waves with a frequency range of 0.1 to 10 THz (3.3 cm −1 to 333.6 cm −1 ) have unique properties, making them suitable for both fundamental research and industrial applications (Xie, Yang, & Ying, 2014). There have been great advances in THz spectroscopy technology since its emergence in the early 1990s.…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Review on Food Applications of Terahertz Spectroscopy and Imaging

Afsah‐Hejri

Hajeb

Ara

et al. 2019

Comp Rev Food Sci Food Safe

221

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Food product safety is a public health concern. Most of the food safety analytical and detection methods are expensive, labor intensive, and time consuming. A safe, rapid, reliable, and nondestructive detection method is needed to assure consumers that food products are safe to consume. Terahertz (THz) radiation, which has properties of both microwave and infrared, can penetrate and interact with many commonly used materials. Owing to the technological developments in sources and detectors, THz spectroscopic imaging has transitioned from a laboratory‐scale technique into a versatile imaging tool with many practical applications. In recent years, THz imaging has been shown to have great potential as an emerging nondestructive tool for food inspection. THz spectroscopy provides qualitative and quantitative information about food samples. The main applications of THz in food industries include detection of moisture, foreign bodies, inspection, and quality control. Other applications of THz technology in the food industry include detection of harmful compounds, antibiotics, and microorganisms. THz spectroscopy is a great tool for characterization of carbohydrates, amino acids, fatty acids, and vitamins. Despite its potential applications, THz technology has some limitations, such as limited penetration, scattering effect, limited sensitivity, and low limit of detection. THz technology is still expensive, and there is no available THz database library for food compounds. The scanning speed needs to be improved in the future generations of THz systems. Although many technological aspects need to be improved, THz technology has already been established in the food industry as a powerful tool with great detection and quantification ability. This paper reviews various applications of THz spectroscopy and imaging in the food industry.

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Section: Wavelength (In Meters)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review on Food Applications of Terahertz Spectroscopy and Imaging

Afsah‐Hejri

Hajeb

Ara

et al. 2019

Comp Rev Food Sci Food Safe

221

View full text Add to dashboard Cite

show abstract

“…In recent years, terahertz detection technology has been utilized in areas such as agricultural breeding (Liu, Liu, Hu, Yang, & Zheng, ; Qin, Li, Chen, & Chen, ), medicine (Qin, Xie, & Ying, ), biology (Tang et al, ), chemistry (Hoshina, Iwasaki, Katahira, Okamoto, & Otani, ; Yin, Tang, & Tong, ), and foods (Ge, Jiang, Lian, Zhang, & Xia, ; Liu et al, ; Maeng et al, ).…”

Section: Introductionmentioning

confidence: 99%

Studies on qualitative and quantitative detection of trehalose purity by terahertz spectroscopy

Huang

Li²,

et al. 2020

Food Science & Nutrition

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Terahertz spectroscopy was used to qualitatively and quantitatively analyze four samples (three brands) of trehalose produced in China and other countries. The results show that the main characteristic peak was greatly affected by concentration, and the optimal detection concentration of trehalose was determined to be 25%–55% by transmission scanning. There were six significant characteristic absorption peaks in the trehalose spectrum, meaning that terahertz spectroscopy can be used for qualitative analysis, analogous to infrared spectroscopy. Moreover, the terahertz spectrum can effectively distinguish the three isomers of trehalose, whereas infrared spectroscopy cannot. Thus, it was found that the current commercially available trehalose is the α,α‐isomer. Quantitative analysis of the three brands of trehalose using terahertz spectroscopy matched the purity trends found by high‐performance liquid chromatography analysis, with the order of purity from highest to lowest being TREHA, Pioneer, and Huiyang. The actual quantitative values did differ between the two detection methods, but the variation in the values from the same sample obtained by the two detection methods was less than 5%, confirming that terahertz spectroscopy is very suitable for the rapid and relative quantitative detection of trehalose.

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“…The terahertz (THz) spectral region is within 0.1-10 THz, equivalent to 3000-30 µm in the electromagnetic spectrum [1]. THz radiation has a wide range of applications, such as remote sensing of toxic chemicals in the petrochemical industry [2], sensing of drug integrity in the pharmaceutical industry [3], and basal cancer detection in the medical industry [4].…”

Section: Introductionmentioning

confidence: 99%

Proposal for a Quad-Elliptical Photonic Crystal Fiber for Terahertz Wave Guidance and Sensing Chemical Warfare Liquids

et al. 2019

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A porous-core photonic crystal fiber based on a cyclic olefin homopolymer (Zeonex) is proposed; it shows high birefringence, high core power fraction, low losses, and near-zero flat dispersion. The fiber’s core was designed with quad-elliptical (QE) air holes with its center occupied by bulk background material. The superiority of the QE design over the commonly adopted tri- and penta-elliptical (TE and PE) core designs is demonstrated. The presence of the bulk material at the core center and the geometrical configuration cause a broad contrast in phase refractive indices, thereby producing high birefringence and low transmission losses. A high birefringence of 0.096 was obtained at 1.2 THz, corresponding to a total loss of 0.027 cm−1 and core power fraction of approximately 51%. The chromatic dispersion and effective area of the reported fiber were also characterized within a frequency range of 0.4–1.6 THz. The QE air holes were then filled with chemical warfare agents, namely, tabun and sarin liquids. Then, the relative sensitivity, confinement loss, fractional power flow, and effective material loss (EML) of the sensor were calculated. Nearly the same relative sensitivity (r = 64%) was obtained when the QE core was filled with either liquid. Although the obtained EML for tabun was 0.033 cm−1 and that for sarin was 0.028 cm−1, the confinement loss of the fiber when it was immersed in either liquid was negligible. The proposed fiber can be fabricated using existing fabrication technologies. Moreover, it can be applied and utilized as a THz radiation conveyor in a terahertz time domain spectroscopy system for remote sensing of chemical liquids in the security and defense industries.

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The application of terahertz spectroscopy to liquid petrochemicals detection: A review

Cited by 57 publications

References 95 publications

A Comprehensive Review on Food Applications of Terahertz Spectroscopy and Imaging

A Comprehensive Review on Food Applications of Terahertz Spectroscopy and Imaging

Studies on qualitative and quantitative detection of trehalose purity by terahertz spectroscopy

Proposal for a Quad-Elliptical Photonic Crystal Fiber for Terahertz Wave Guidance and Sensing Chemical Warfare Liquids

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