Detection of Harmful Residues in Honey Using Terahertz Time-Domain Spectroscopy

Abstract

Terahertz time-domain spectroscopy (THz-TDS) has been applied for the detection and discrimination of harmful chemical residues in honey. Three antibiotics (sulfapyridine, sulfathiazole, and tetracycline) and two acaricides (coumaphos and amitraz) were characterized in the THz frequency regime between 0.5 THz and 6.0 THz. All chemical substances present distinct absorption peaks. THz transmission measurements of honey mixtures with antibiotics have been performed, revealing that antibiotic residues are traceable in highly absorptive food products, such as honey, at concentrations down to 1% weight percentage, thanks to their THz fingerprints. Moreover, multiple antibiotics were identified in their mixture with honey, pointing out the potential of the technique to be used in the near future as a fast, real-time technique for detecting and discriminating multi-residues strictly related to food safety issues.

Determination of invert syrup adulterated in acacia honey by terahertz spectroscopy with different spectral features

“…depicts the broad absorption spectra due to the complex components in honey. Previous studies have signified that the terahertz absorption curves of honey had no specific absorption peak . This is because honey is a mixture of water, saccharides, minerals, organic acid, pigment, wax, natural perfume, pollen grains, yeast, enzymes, vitamins, and so on, and so the characteristic peaks are overlapped.…”

“…Previous studies have signified that the terahertz absorption curves of honey had no specific absorption peak. 20,36 This is because honey is a mixture of water, saccharides, minerals, organic acid, pigment, wax, natural perfume, pollen grains, yeast, enzymes, vitamins, and so on, 37 and so the characteristic peaks are overlapped. Also, there is an observed regularity between the absorption coefficient and invert syrup proportion.…”

“…19 Massaouti et al discriminated antibiotics (sulfapyridine, sulfathiazole, and tetracycline) and acaricides (coumaphos and amitraz) in honey using terahertz fingerprint spectroscopy. 20 The terahertz technique has also been proven as a quantitative tool to analyze the amount of tetracycline hydrochloride in infant milk powder, 21 the aflatoxin B1 concentration in acetonitrile, 22 and melamine in foods. 23 In general, the majority of terahertz spectroscopic data are assayed based on the characteristic absorption peaks.…”

Compact All-Quantum-Dot-Based Tunable THz Laser Source

“…Such laser source emitting tunable THz radiation is of great interest for a number of applications, including indoor communications [27,28], biomedical imaging [29,30], spectroscopy [31,32], homeland security and defense [33,34], among others.…”

Исследование Пропускания Легированного Железом Селенида Цинка В Терагерцовом Диапазоне Частот-=sup=-*-=/Sup=-

“…Терагерцовый диапазон частот в последние десяти-летия привлекает все больше внимания, что связано с перспективными возможностями использования в сис-темах неинвазивного контроля [1][2][3], безопасности [4], сверхбыстрой передачи информации [5]. Перспективы и возможности использования терагерцовых систем огра-ничены в первую очередь нехваткой материалов для создания генераторов, детекторов и преобразователей терагерцового (ТГц) излучения.…”