Article
Chemistry, Multidisciplinary
Mehrvash Varnasseri, Howbeer Muhamadali, Yun Xu, Paul I. C. Richardson, Nick Byrd, David Ellis, Pavel Matousek, Royston Goodacre
Summary: The study explored the use of Raman spectroscopy and SORS technology for the non-destructive detection of adulteration in extra virgin olive oil. Results demonstrated that these methods have significant potential for rapid and accurate analysis.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Analytical
Edward Curran Eggertson, Francesca Venturini
Summary: This study investigates the changes in carotenoid concentration in extra virgin olive oil (EVOO) as it oxidizes under accelerated thermal aging using resonant Raman spectroscopy (RRS). The conventional method, HPLC, used to determine carotenoid concentration is costly and time-consuming. The study finds that the resonant Raman technique amplifies the weak carotenoid signals and identifies Raman intensity ratios as indicators of aging effects.
Article
Food Science & Technology
Ken Abamba Omwange, Dimas Firmanda Al Riza, Yoshito Saito, Tetsuhito Suzuki, Yuichi Ogawa, Keiichiro Shiraga, Ferruccio Giametta, Naoshi Kondo
Summary: This study successfully distinguished between different ratios of adulterated EVOO and VOO using front-face fluorescence spectroscopy and UV-induced fluorescence imaging techniques, providing a fast, reliable, and inexpensive method for detecting adulteration.
Article
Chemistry, Analytical
Ting Zhang, Yuyang Liu, Zhuoping Dai, Lihan Cui, Hongze Lin, Zejian Li, Kaihua Wu, Guangyu Liu
Summary: LED-induced fluorescence spectroscopy can be used to determine the adulteration level of soybean oil and peanut oil in blended extra virgin olive oil, showing feasibility for future handheld device development.
Article
Automation & Control Systems
Somaye Vali Zade, Elaheh Forooghi, Behrooz Jannat, Fataneh Hashempour-baltork, Hamid Abdollahi
Summary: This study used Raman spectroscopy to investigate five pure edible oils and proposed a combined classification strategy to successfully identify pure oil samples and detect and identify the type and composition of adulterated extra virgin olive oil.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2023)
Article
Chemistry, Applied
Peipei Fang, Hongpeng Wang, Xiong Wan
Summary: This study introduces a method using laser confocal Raman technique combined with theoretical Raman spectra based on DFT to accurately analyze the molecular differences between extra virgin olive oil (EVOO) and low-cost olive oil, and achieve quantitative analysis using chemometrics.
Article
Chemistry, Analytical
Iago H. A. S. Barros, Layla P. Santos, Paulo R. Filgueiras, Wanderson Romao
Summary: In this study, a full factorial design was carried out to optimize the detection and quantification of adulterated soybean oil in extra virgin olive oil using a portable Raman spectrometer. The ratios between vibrational bands were evaluated as response measures, and the best regression model using ordinary least squares was determined for quantification. By constructing an analytical curve and validating the model, it was found that the intensity ratio of I1266/I1440 presented the highest linearity and accuracy for determining adulterant concentrations.
VIBRATIONAL SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Iago H. A. S. Barros, Layla S. Paixao, Marcia H. C. Nascimento, Valdemar Lacerda, Paulo R. Filgueiras, Wanderson Romao
Summary: This study used portable Raman spectroscopy and chemometric methods to successfully identify and quantify adulteration in commercial EVOO samples, with the iPLS method showing the best performance. This provides an effective approach for detecting food fraud.
VIBRATIONAL SPECTROSCOPY
(2021)
Article
Computer Science, Information Systems
Hari Krishna Salila Vijayalal Mohan, Pyei Phyo Aung, Chee Fong Ng, Zheng Zheng Wong, Andrew Alexander Malcolm
Summary: Economically motivated adulteration (EMA) and/or cross-contamination are the main factors causing substandard quality in premium edible oil like extra virgin olive oil (EVOO) produced in the food and beverage (F&B) fast-moving consumer goods (FMCG) industries. Current quality assurance methods are not suitable for in situ testing and high throughput inspection, resulting in food loss and waste. A low-cost electrical approach based on capacitance is proposed to non-invasively screen EVOO-filled containers for adulteration, showing fast response and low detection limits for different adulterants.
Article
Food Science & Technology
Jassana Bernicker de Magalhaes, Karoline Fontana Simon, Emiliano Amarante Veiga, Alessandro Cazonatto Galvao, Weber da Silva Robazza
Summary: This study evaluated the application of electrochemical impedance spectroscopy in identifying the adulteration of extra virgin olive oil with canola and sunflower oils. The results demonstrated that the technique successfully classified the non-adulterated and adulterated samples and provided a clear distinction between the adulterants.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Elisabet Martin-Tornero, Antonio Fernandez, Isabel Duran-Meras, Daniel Martin-Vertedor
Summary: The study monitored the quality of 'Picual' olive oil stored in different containers for 10 months, revealing the impact of light exposure on Transparent Crystal and Opaque Crystal samples. Fluorescence spectroscopy and PARAFAC analysis successfully tracked oxidation changes and produced a regression model.
Article
Biochemical Research Methods
Omnia Hamdy, Haitham S. Mohammed
Summary: Olive oils are often adulterated due to their higher price compared to other vegetable oils. The traditional methods for detecting adulteration are complex and require sample preparation. In this study, a Laser-induced fluorescence (LIF) technique was used to detect alterations and adulteration in olive oil mixed with sunflower or corn oil. The results showed changes in chlorophyll peak intensity due to heating and adulteration. The correlation of the measurements was evaluated using partial least-squares regression (PLSR) with an R-squared value of 0.95. The system performance was assessed using receiver operating characteristics (ROC) with a maximum sensitivity of 93%.
JOURNAL OF FLUORESCENCE
(2023)
Review
Food Science & Technology
Valentina Maestrello, Pavel Solovyev, Luana Bontempo, Luisa Mannina, Federica Camin
Summary: Extra virgin olive oil (EVOO) is a high-quality product that has become a target of food fraud in recent years. The use of nuclear magnetic resonance (NMR) spectroscopy is reviewed as a reliable and rapid tool to authenticate EVOOs and detect adulteration and mislabeling.
COMPREHENSIVE REVIEWS IN FOOD SCIENCE AND FOOD SAFETY
(2022)
Article
Chemistry, Applied
Sandra Pradana-Lopez, Ana M. Perez-Calabuig, John C. Cancilla, Yolanda Garcia-Rodriguez, Jose S. Torrecilla
Summary: A research was conducted using convolutional neural networks for the classification and detection of EVOOs, successfully validating an algorithm capable of accurately classifying different types of EVOO and detecting their adulteration concentrations.
Article
Biochemistry & Molecular Biology
Emmanouil Orfanakis, Aggeliki Koumentaki, Aikaterini Zoumi, Aggelos Philippidis, Peter C. Samartzis, Michalis Velegrakis
Summary: This study aims to detect benzo[a]pyrene residues in extra virgin olive oil using an easily adaptive optical methodology based on fluorescence spectroscopy, which does not require any sample pretreatment. The detection of benzo[a]pyrene even at low concentrations in the oil samples demonstrates the capability of fluorescence spectroscopy to ensure food safety.
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)