Article
Spectroscopy
Lanlan Li, Chenxi Jiang, Jing Xiao, Hong Luo, Shu Zhang, Zhirong Zou, Ke Huang
Summary: Selenium, mercury and arsenic are widely distributed in the environment, and their toxicity depends on their concentration and forms. Accurate monitoring of these elements is necessary. Photochemical vapor generation (PVG) is a promising method for analytical atomic spectrometry, and it has been applied to determine selenium, mercury and arsenic with various separation techniques. This review summarizes the applications of PVG-analytical atomic spectrometry in selenium, mercury and arsenic speciation analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Engineering, Multidisciplinary
Cagdas Buyukpinar, Suleyman Bodur, Elif Yazici, Zeynep Tekin, Nevim San, Okan Tarik Komesli, Sezgin Bakirdere
Summary: An eco-friendly and accurate analytical protocol was proposed for the determination of trace levels of cadmium in this study. By combining PVG and T-SQT-AT techniques, the analytical performance of the system was enhanced, with good recovery results obtained in tap water and daphne tea samples.
Article
Nutrition & Dietetics
Piotr Bawiec, Jan Sawicki, Paulina Lasinska-Pracuta, Marcin Czop, Ireneusz Sowa, Katarzyna Ilowiecka, Wojciech Koch
Summary: Bioavailability refers to the fraction of a substance that is absorbed from the gastrointestinal tract and enters the bloodstream. This study aimed to assess the bioavailability of selenium (Se) from dietary supplements and explore the influence of diet type on relative bioavailability. The research used a two-stage in vitro digestion model to simulate the digestion of food containing dietary supplements. Selenium bioavailability ranged from 19.31% to 66.10% in the presence of food matrix. Sodium selenate had the highest bioavailability, followed by organic forms and sodium selenite. The basic diet with moderate protein and high carbohydrate and fiber content positively influenced Se bioavailability. The pharmaceutical form of the product also affected bioavailability, with tablets having the highest bioavailability, followed by capsules and coated tablets.
Article
Chemistry, Analytical
Aleksandra Sentkowska, Krystyna Pyrzynska
Summary: The stability of inorganic and organic selenium species in standard solutions and dietary supplement extracts was investigated. The study found that the sample solvent pH and storage temperature have an impact on selenium stability, and the sample matrix has a significant influence on the stability of selenium compounds. Light does not affect selenium stability in both standard solutions and supplement extracts.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2022)
Article
Environmental Sciences
Ru Zhang, Yi Yang, Meng Min, Yonghua Li
Summary: This thesis conducted an integrated study on the regulation of selenium nutrition in response to the maldistribution and low dietary intake of selenium in China. In vitro simulation tests and in vivo animal experiments were used to evaluate the effects of different dietary supplement combinations on the bioaccessibility of selenium. The results showed that certain combinations of supplements can significantly increase the bioavailability of selenium and enhance the antioxidant capacity of the body. These findings provide a scientific reference for the regulation of selenium nutrition.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Review
Food Science & Technology
Frineth de la Luz Limon Aguilera, Sayra N. Serrano Sandoval, Mauricio Graciano-Palacios, Janet A. Gutierrez-Uribe, Anayansi Escalante-Aburto
Summary: Selenium in its organic form plays a crucial role in human metabolism, functioning as an antioxidant and reducing inflammatory biomarkers associated with overweight and obesity. Studies suggest that selenocompounds may have potential therapeutic effects for obesity. Various strategies have been developed worldwide to produce selenium-enriched foods and supplements, aiming to increase accessibility for consumers.
FOOD REVIEWS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Yongchun Liu, Jie Zou, Bin Luo, Hairong Yu, Zhigang Zhao, Hui Xia
Summary: Using natural plant extracts as auxiliary matrix or photocatalysts can enhance the efficiency and sensitivity of photochemical vapor generation atomic fluorescence spectrometry for trace mercury determination, while reducing biological toxicity and secondary pollution. This green and sensitive method provides an experimental basis for expanding the photochemical vapor generation system.
MICROCHEMICAL JOURNAL
(2021)
Article
Environmental Sciences
Cagdas Buyukpinar, Elif Yazici, Nevim San, Okan Tarik Komesli, Sezgin Bakirdere
Summary: The study combined UV-PVG with T-SQT-AT to enhance the sensitivity of flame atomic absorption spectrophotometer for nickel determination, successfully analyzing nickel in daphne tea and lake water samples, with spike experiments demonstrating good accuracy of the method.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Chemistry, Analytical
Lanlan Li, Qirui Huang, Jing Xiao, Jiamin Feng, Shu Zhang, Hong Luo, Zhirong Zou, Xiaoli Xiong
Summary: In this study, Fe3O4 served as both an adsorbent and photocatalyst in the photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) determination of Bi(III) after preconcentration. The effects of formic and acetic acid concentration, UV irradiation time, Fe3O4 concentration, and interferences from co-existing ions were investigated. Results showed that the AFS intensity was slightly enhanced by the mixed acid solution, but a significant enhancement was observed when Fe3O4 was used as a photocatalyst. Fe3O4 can decompose in the mixed acid solution, generating Fe3+ which acts as a sensitizer for improving Bi(III) efficiency. Under optimized conditions, the LOD of the proposed PVG-AFS system with or without preconcentration (5 mL sample) were 0.44 ng/mL and 0.07 ng/mL, respectively. The PVG-AFS system was successfully applied to the determination of water samples and demonstrated good accuracy and applicability with recoveries ranging from 94% to 104%.
MICROCHEMICAL JOURNAL
(2022)
Review
Endocrinology & Metabolism
Vinesh Dahiya, Neeru Vasudeva, Sunil Sharma, Ashok Kumar
Summary: This article analyzed the benefits and risks of using dietary supplements for the prevention and treatment of various thyroid disorders. It emphasized the importance of nutrients for thyroid function and highlighted the potential risks associated with the use of dietary supplements.
ENDOCRINE METABOLIC & IMMUNE DISORDERS-DRUG TARGETS
(2022)
Article
Chemistry, Multidisciplinary
Elif Yazici, Cagdas Buyukpinar, Suleyman Bodur, Nevim San, Okan Tarik Komesli, Sezgin Bakirdere
Summary: A novel SA-GLS-PVG-T-SQT-AT-FAAS system was developed for the quantification of trace levels of antimony in daphne tea and tap water samples. The method showed a 96-fold increase in detection power compared to conventional FAAS, with a LOD of 28.4 μg/L. Spiking experiments demonstrated a high level of accuracy, with percent recovery results ranging from 90.2% to 108.0%.
Article
Chemistry, Analytical
Yuheng Lu, Chenghui Li, Yunfei Tian, Jing Hu, Xiandeng Hou
Summary: The highly sensitive detection of trace tellurium (Te(IV)) in real samples with complicated matrix was achieved by using a new method based on photochemical vapor generation-atomic fluorescence spectrometry (PVG-AFS) and Co-MOF-74 as an adsorbent and Co2+ ion sensitizer. The synthesized Co-MOF-74 showed excellent adsorption capability for Te(IV) within a short time. After conversion to volatile compounds under UV irradiation, the Te(IV) was detected by AFS. The proposed method exhibited a limit of detection of 0.08 ng/mL for Te(IV) after a 50-fold preconcentration and was successfully applied to the analysis of various natural water samples with satisfactory spike recoveries.
ANALYTICA CHIMICA ACTA
(2023)
Article
Nutrition & Dietetics
Zhuo Wang, Chao Yang, Defu Tang, Xue Yang, Li Zhang, Qunli Yu
Summary: The aim of this study was to evaluate the effects of selenium yeast and jujube powder on the structure and functional properties of post-mortem myofibrillar protein (MP) in white feather broilers. The results showed that increasing concentrations of selenium yeast and jujube powder resulted in significant improvement of solubility, emulsification, and foaming of post-mortem chicken MP, while decreasing beta-folding content and turbidity. The combination of high-dose selenium yeast and jujube powder had the best improvement effect, with significant interactions in multiple indices of MP.
FRONTIERS IN NUTRITION
(2022)
Article
Chemistry, Multidisciplinary
Matheus Fernandes Filgueiras, Endler Marcel Borges
Summary: In this study, students used four colorimetric assays to determine the iron content in dietary supplements. These assays selectively detected Fe3+ and formed blood-red, red, violet, and blue complexes. Quantitative analysis was carried out by comparing the absorbance at the lambda max of each assay using the standard method, as well as by analyzing digital images obtained with a desktop scanner using the proposed method. The matrix effect was investigated and statistical tests were conducted to compare the results obtained from the four assays.
JOURNAL OF CHEMICAL EDUCATION
(2022)
Article
Chemistry, Analytical
Jaromir Vyhnanovsky, Dilek Yildiz, Barbora Stadlerova, Stanislav Musil
Summary: The study achieved photochemical vapor generation of bismuth with optimal conditions determined through investigating the influence of sensitizers and reaction medium flow rate. Combining PVG with atomic fluorescence spectrometry can provide low limits of detection at a low operation cost.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Aroa Garcia Gonzalez, Lukas Taraba, Jakub Hranicek, Petr Kozlik, Pavel Coufal
JOURNAL OF SEPARATION SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Ondrej Linhart, Jana Smolejova, Vaclav Cerveny, Jakub Hranicek, Elika Novakova, Tina Resslerova, Petr Rychlovsky
MONATSHEFTE FUR CHEMIE
(2016)
Article
Chemistry, Inorganic & Nuclear
Sona Prochazkova, Jakub Hranicek, Vojtech Kubicek, Petr Hermann
Article
Spectroscopy
Eliska Novakova, Petr Rychlovsky, Tina Resslerova, Jakub Hranicek, Vaclav Cerveny
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2016)
Article
Spectroscopy
Marcela Rybinova, Stanislav Musil, Vaclav Cerveny, Miloslav Vobecky, Petr Rychlovsky
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2016)
Article
Spectroscopy
E. Novakova, O. Linhart, V. Cerveny, P. Rychlovsky, J. Hranicek
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2017)
Article
Food Science & Technology
Michal Tupec, Veronika Hyskova, Katerina Belonoznikova, Jakub Hranicek, Vaclav Cerveny, Helena Ryslava
Article
Chemistry, Analytical
E. Novakova, M. Rybinova, J. Hranicek, P. Rychlovsky, V. Cerveny
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2018)
Article
Chemistry, Analytical
Ondrej Linhart, Alzbeta Kolorosova-Mrazova, Jan Kratzer, Jakub Hranicek, Vaclav Cerveny
ANALYTICAL LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Karel Nesmerak, Karel Kudlacek, Martin Sticha, Vaclav Cerveny, Jana Kunesova, Ilkay Yildiz
MONATSHEFTE FUR CHEMIE
(2018)
Article
Biochemistry & Molecular Biology
Veronika Hyskova, Veronika Pliskova, Vaclav Cerveny, Helena Ryslava
GENERAL PHYSIOLOGY AND BIOPHYSICS
(2017)
Proceedings Paper
Chemistry, Analytical
Ondrej Linhart, Vaclav Cerveny, Jakub Hranicek, Petr Rychlovsky
PROCEEDINGS OF THE 12TH INTERNATIONAL STUDENTS CONFERENCE MODERN ANALYTICAL CHEMISTRY
(2016)
Article
Chemistry, Analytical
Michel Rocha Baqueta, Augusto Cesar Costa-Santos, Ana Paula Rebellato, Gisele Marcondes Luz, Juliana Azevedo Lima Pallone, Federico Marini, Alexsandro Lara Teixeira, Douglas N. Rutledge, Patricia Valderrama
Summary: This study reports the essential element composition of new Brazilian Canephora coffees and applies chemometric tools for analysis. The results demonstrate the suitability of this method for origin and species discrimination based on the inorganic fraction of coffee.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mengjie Li, Jiapeng Wang, You Zhou, Yang Chen, Lingying Xia
Summary: A novel photoelectrochemical biosensor based on gold nanoparticles and specific structures was developed for highly sensitive detection of mercury ion. The multiple sandwich structures hindered electron supply and light harvesting, resulting in a weakened PEC signal, while the specific structures extinguished the PEC signal, enabling quantitative detection of Hg2+. The sensor exhibited high selectivity and stability, with potential applications in environmental detection, biological analysis, and medical research.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Mohamed A. Korany, Rasha M. Youssef, Marwa A. A. Ragab, Mostafa A. Afify
Summary: A stability-indicating fit-for-purpose method was developed for the determination of HC, TL, and PS in syrup dosage form. The method successfully separated CL from THY and quantified the analytes using HPLC-DAD. The robustness of the method was assessed through statistical analysis and self-validation.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Lingling Lin, Minyu Li, Ping Li, Chenqing Ye, Huanglong Zhuang, Shaohuang Weng, Feng Chen
Summary: This study developed a highly sensitive and selective electrochemical sensor for simultaneous detection of dopamine and uric acid. The sensor exhibited excellent anti-interference and stability, and could accurately measure dopamine and uric acid in human urine samples.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Peifang Chen, Caiyun Jiang, Zhouping Wang, Hong-zhen Lian, Xiaoyuan Ma
Summary: In this study, a high-performance SERS-active aptasensor was successfully developed for the quantitative analysis of AFB1 in cereal grains, which is of great significance in the field of food safety.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
E. Abas, C. Marina-Montes, C. Perez-Marin, J. Puimedon, J. Anzano
Summary: This study conducted a comprehensive measurement of natural and anthropogenic radionuclides in soil, water, and air in different locations around Deception Island in Antarctica. The results revealed significant levels of 210Pb and anthropogenic 137Cs in soil samples near old human settlements and facilities, as well as detectable levels of 137Cs and 60Co in water samples from old hunting areas. The findings also suggested potential resuspension processes based on higher-than-expected air quality results.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Joao Franciso Allochio, Nayara A. dos Santos, Nathalia dos S. Conceicao, Clara S. D. Baptista, Keyller B. Borges, Valdemar Lacerda Jr, Wanderson Roma
Summary: This study developed a fiber spray ionization mass spectrometry (FSI-MS) method, which shows great potential in detecting illicit drugs. Compared with paper spray ionization mass spectrometry (PSI-MS), FSI-MS demonstrates higher sensitivity in COC detection.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Dina A. Ahmed, Ola G. Hussein, Mamdouh R. Rezk, Mohamed Abdelkawy, Yasmin Rostom
Summary: The main goal of this study was to develop two green chromatographic techniques, HPLC and TLC, for the determination of alcaftadine (ALF) in pharmaceutical formulation and biological samples. The developed HPLC technique showed high efficiency and minimal environmental impact, successfully identifying ALF in the presence of its degradate. The TLC method provided a stability indicating study for ALF and was determined to be safe, green, and eco-friendly.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Abdullah Taner Bisgin
Summary: A green, speedy, and handy method for separation and determination of four commonly used food colorants was established using vortex assisted sequential-simultaneous liquid phase micro-extraction (VA-SS-LPME). The method does not require any instrumental chromatographic techniques. The procedure includes sequential separation steps using different extractants and simultaneous UV-vis spectrophotometric determination steps. The method is environmentally friendly and applicable for determination of colorants in food and pharmaceuticals.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Yifan Zhang, Tong Zhang, Wenjing Ba, Li Liu, Yuan Rao, Xiaodan Zhang, Hanhan Zhang, Xiu Jin
Summary: This paper proposes a novel spectral transfer modelling method based on neural network architecture searching for the asymptomatic prediction of Akizuki pear cork spot disorder. The experiments show that the model by this method is more effective, achieving an accuracy of 82.61%.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Krzysztof Greda, Maja Welna, Anna Szymczycha-Madeja, Pawel Pohl
Summary: For the first time, a dispersive micro-solid phase extraction (D-mu SPE) based on graphene oxide was used for the ultrasensitive determination of Cd. With this method, Cd can be efficiently extracted from a mixture of alkali and alkaline earth metals without the need for an elution step. The combination of D-mu SPE and SAGD OES significantly reduces matrix effects and improves the tolerance of Cd to alkali metals. The method shows simplicity in the measurement system and the commercially available nanosorbent used.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
P. K. Fathima Anjila, G. R. Tharani, Anand Sundaramoorthy, Venkat Kumar Shanmugam, Karthikeyan Subramani, Shanmugavel Chinnathambi, Ganesh N. Pandian, Vimala Raghavan, Andrews Nirmala Grace, Singaravelu Ganesan, Mangaiyarkarasi Rajendiran
Summary: This work proposes a rapid and sensitive spectroscopic method for detecting melamine in food products using rare-earth Terbium-doped Graphene Quantum Dots (Tb-GQDs) synthesized by microwave and simple chemical conjugation methods. The synthesized Tb-GQDs show a spherical shape with a size of approximately 6 nm and a quantum yield of 52%. The maximum detection limit for melamine concentration in milk and milk products is found to be 0.31 μM. The dual emitting Tb-GQDs provide a sensitive and effective platform for real-time detection of melamine in food samples, particularly in milk, and show promising potential in the food industry.
MICROCHEMICAL JOURNAL
(2024)
Review
Chemistry, Analytical
Piyush Dey, Mandeep Kaur, Akhil Khajuria, Dilmeet Kaur, Manpreet Singh, Hema Kumari Alajangi, Neha Singla, Gurpal Singh, Ravi Pratap Barnwal
Summary: Environmental issues, such as the uncontrolled release of dangerous pollutants, have significant impacts on human health. Traditional methods for detecting pollutants require specialized personnel and equipment, but nanotechnology has improved the performance of biosensors. This article discusses the use of nanotechnology in pollutant detection and the associated techniques.
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Sa Dong, Qiuyun Shi, Lingjun Guan, Yulong Wang, Pengyan Liu, Cunzheng Zhang, Jianguo Feng
Summary: In this study, a highly sensitive indirect competitive chemiluminescence enzyme immunoassay (icCLEIA) method was developed for the determination of sodium pentachlorophenolate (PCP-Na) and its metabolite pentachlorophenol (PCP). The method showed high specificity and affinity with a detection limit of 0.0032 ng/mL for PCP-Na and 0.0192 ng/mL for PCP. The method had no cross reaction with other chlorophenols compounds except for PCP. The average recoveries in chicken, pork and fish samples were 81.3-105.8% with low coefficient of variation (CV).
MICROCHEMICAL JOURNAL
(2024)
Article
Chemistry, Analytical
Palaniappan Ilayaraja, Murugan Manivannan, Paramasivam Parthiban
Summary: Nirmatrelvir, an antiviral drug used for the treatment of COVID-19, has been recommended by the World Health Organization. We developed an optimized analytical method for the quantification of Nirmatrelvir and its products, with high sensitivity and a wide linear range. The method also meets the requirements for greenness evaluation.
MICROCHEMICAL JOURNAL
(2024)