Article
Chemistry, Applied
Gill-Woong Jang, Sun-Il Choi, Seung-Hyun Choi, Xionggao Han, Xiao Men, Hee-Yeon Kwon, Ye-Eun Choi, Ok-Hwan Lee
Summary: The study developed and validated a method for simultaneous quantitative analysis of food dyes in chewing gum and soft drinks, showing good performance in both food matrices. The stability of dyes in the matrices was confirmed to be over 30 days.
Article
Chemistry, Applied
Delia Castilla-Fernandez, David Moreno-Gonzalez, Bienvenida Gilbert-Lopez, Juan F. Garcia-Reyes, Antonio Molina-Diaz
Summary: Despite efforts to address pesticide residues in citrus-flavored soft drinks over more than ten years, a new study shows that the issue persists. Globally, 98% of samples were found to contain at least one pesticide, with 85% having more than 4 pesticides. Europe had the highest total amount of pesticides, likely due to higher juice concentrate content in samples.
Article
Biochemistry & Molecular Biology
Reedmond Y. Fong, Gunter G. C. Kuhnle, Alan Crozier, Hagen Schroeter, Javier Ottaviani
Summary: Nutritional biomarkers are important for assessing dietary intake objectively. This study validated a high throughput method for quantifying SREMs, gVLMs, and MXs in plasma, showing it to be an accurate analytical tool.
Article
Biochemical Research Methods
C. Soto, H. D. Ponce-Rodriguez, J. Verdu-Andres, R. Herraez-Hernandez, P. Campins-Falco
Summary: In this study, three miniaturized liquid chromatography instruments were evaluated for analyzing caffeine in dietary supplements. The benchtop systems showed superior sensitivity, with capillary LC and nano LC systems having lower limits of detection compared to the portable LC system. The portable LC method was simpler and faster, while still providing accurate quantification of caffeine content in the samples.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Chemistry, Multidisciplinary
Muzaffar Iqbal, Essam Ezzeldin, Nazrul Haq, Prawez Alam
Summary: A novel UPLC-MS/MS assay utilizing dispersive liquid-liquid microextraction and ultrasound-assisted reverse extraction has been developed for determination of multiclass pharmaceuticals in water samples. The method showed specificity and reliability for trace analysis of target analytes in waste water samples.
Article
Chemistry, Multidisciplinary
Alvaro Santana-Mayor, Antonio Herrera-Herrera, Ruth Rodriguez-Ramos, Barbara Socas-Rodriguez, Miguel Angel Rodriguez-Delgado
Summary: A green alternative method using a natural hydrophobic deep eutectic solvent was developed for the extraction of phthalic acid esters and an adipate in cold infusions and tonic waters. The method was validated and applied for the first time using this solvent, demonstrating successful extraction and analysis of the compounds in cold infusions and tonic waters.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Shady Awwad, Reem Issa, Lilian Alnsour, Dima Albals, Idrees Al-Momani
Summary: This study aimed to determine the levels of caffeine and chlorogenic acid in coffee samples and their relationship with the degree of roasting. The results showed a negative correlation between chlorogenic acid levels and roasting degree, while a positive correlation was found between caffeine levels and roasting degree. The origin of coffee samples had no significant effect on these chemical components.
Article
Chemistry, Physical
Ahmed I. Foudah, Faiyaz Shakeel, Mohammad A. Salkini, Sultan Alshehri, Mohammed M. Ghoneim, Prawez Alam
Summary: This study aimed to establish a rapid, sensitive, and green reverse-phase high-performance thin-layer chromatography method for caffeine estimation in commercial energy drinks and pharmaceutical formulations. The method was simple, accurate, precise, robust, and environmentally friendly. The developed method yielded caffeine concentrations of 21.02-37.52 mg 100 mL(-1) in energy drinks and 10.63-20.30 mg 100 mL(-1) in commercial formulations.
Article
Food Science & Technology
Oktawia Kalisz, Sylwia Studzinska, Szymon Bocian
Summary: Caffeine is a natural psychoactive substance found in various plants such as coffee, tea, cocoa, guarana, and yerba mate. It is commonly added to dietary supplements for its metabolism-boosting and weight loss benefits. A novel UHPLC method using environmentally friendly solvents was developed to determine the caffeine content in dietary supplements.
Article
Spectroscopy
Jingxiang Shen, Zhefeng Fan
Summary: An ultrasimple turn-on sensor for indirectly detecting ascorbic acid (AA) was developed using N-acetyl-L-cysteine stabilized copper nanoclusters (NAC-CuNCs) via the aggregation-induced emission (AIE) effect controlled by Ce4+/Ce3+ redox reaction. The sensor takes advantage of the different properties of Ce4+ and Ce3+. Non-emissive NAC-CuNCs were synthesized and easily aggregate in the presence of Ce3+, resulting in fluorescence enhancement. Ce4+ reacts with AA via a redox reaction, producing Ce3+ and switching on the luminescence of NAC-CuNCs. The probe exhibited excellent sensitivity and selectivity, with a low limit of detection, and was successfully applied to detect AA in soft drinks.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Biotechnology & Applied Microbiology
Raees Ahmad, Eunji Cho, Sultonov Rakhmat, Moonjung Hyun, Chang-Beom Park, Sunghwan Kim
Summary: This study characterized and quantified the structure isomers of EBACs in three different commercial disinfectants using UHR-MS and cIM-MS. The main components of the disinfectants were identified as C12 and C14 EBACs, and the ortho and para structural isomers of EBACs were determined. A method for quantifying the total amount of EBACs homologues and isomers was developed. This study provides a comprehensive evaluation of EBACs in household disinfectant products for the first time.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Chemistry, Multidisciplinary
Yanmei Yang, Weiqing Wang, Zhenzhen Chen, Xiaoxiao Wang, Xia Meng, Zhenhua Wang, Heping Jiao, Lili Tong, Bo Tang
Summary: Arsenate (As(v)) is a highly toxic substance found widely in the environment. It is crucial to accurately and quickly determine the concentration of As(v). In this study, we developed a novel competitive coordination strategy using online internal extractive electrospray ionization mass spectrometry (iEESI-MS) for the quantification of ultratrace As(v). Our method showed excellent performance in detecting ultratrace As(v) directly in a wide range of samples, including solids and liquids such as food, water, and biological samples.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Erdal Dinc, Asiye Ucer, Nazangul Unal
Summary: A parallel factor analysis (PARAFAC) model was proposed to decompose second-order kinetic UV measurements of caffeine chlorination reaction into spectra, time, and concentration matrices. The PARAFAC tool provided simultaneous estimation of caffeine's spectral, kinetic, and quantitative analysis. Validation samples with interferences were used to check the ability of the PARAFAC model. Caffeine in commercial drinks was analyzed using the concentration matrices of the PARAFAC application, and the results were compared to the UPLC method.
Article
Chemistry, Applied
Kim Maasen, Jean L. J. M. Scheijen, Antoon Opperhuizen, Coen D. A. Stehouwer, Marleen M. Van Greevenbroek, Casper G. Schalkwijk
Summary: This study analyzed dicarbonyls in commonly-consumed products in a Western diet and established a dietary dicarbonyl database of 223 foods and drinks. Dicarbonyl concentrations were highest in dried fruit, Dutch spiced cake, and candy bars, while lowest in tea, dairy, light soft drinks, and rice. The database provides the opportunity to estimate dietary exposure to dicarbonyls and explore their physiological impact on human health.
Article
Chemistry, Physical
Hong Li, Yang Zhou, Jianxiu Du
Summary: Ascorbic acid can be used as an efficient coreactant for luminol chemiluminescence reaction to determine its concentration directly. The method shows good linear response and selectivity.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
