Article
Chemistry, Analytical
Wen Zeng, Zenghui Hu, Jin Luo, Xiandeng Hou, Xiaoming Jiang
Summary: The method proposed a highly sensitive determination of trace antimony using cobalt ion enhanced PCVG for sample introduction into AFS or ICP-MS. By optimizing the experimental conditions, including enhancement ions, acid medium, UV irradiation, working gas, and potential interference, the method achieved low detection limits and satisfactory recoveries in the analysis of real water samples.
ANALYTICA CHIMICA ACTA
(2022)
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)
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
Haiyan Yang, Kejun Li, Yanping Wang, Xin Yuan, Mei Zhang
Summary: A simple and label-free method was developed for hydrogen peroxide (H2O2) assay by chemical vapor generation-atomic fluorescence spectrometry. The method is based on the inhibition of the atomic fluorescence signal of As(III) by L-Cysteine (L-Cys) and the oxidation of L-Cys to cystine by H2O2 and I-. The proposed method has the advantages of simplicity and cost-effectiveness.
MICROCHEMICAL JOURNAL
(2022)
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)
Review
Chemistry, Analytical
Guanghui Niu, Alexander Knodel, Sebastian Burhenn, Sebastian Brandt, Joachim Franzke
Summary: The development of miniature, sensitive, high throughput, and in-situ analytical instruments using dielectric barrier discharge (DBD) has become a hot topic in modern analytical chemistry. DBD offers advantages such as easy operation, simple configuration, ambient working temperature and pressure, low power consumption, and miniature dimension. Its applications in analytical atomic spectrometry include serving as excitation or atomization sources in AES, AAS, and AFS, as well as functioning as a vapor generation system.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Linda Sagapova, Stanislav Musil, Barbora Kodrikova, Milan Svoboda, Jan Kratzer
Summary: By studying the effect of modifiers, it was found that the Cr3+/KCn and Ti4+/KCn environments exhibited higher CVG efficiency and sensitivity, while the Co2+/ascorbic acid/thiourea environment showed lower efficiency.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Lindomar A. Portugal, Edwin Palacio, Rejane Frizzarin, Joao H. Santos Neto, Victor Cerda, Sergio L. C. Ferreira
Summary: This work proposes an automated strategy for the speciation of inorganic selenium in infusion tea samples. The system utilizes an MSFIA-CVG-AFS system and sodium tetrahydroborate for chemical vapor generation. The method involves an online prereduction step to convert selenium (VI) to selenium (IV) before determining the total selenium concentration. The chemical parameters were optimized using a fractional factorial design. The method exhibited low detection and quantification limits, with a linear range and good precision. This method was successfully applied to analyze inorganic selenium speciation in commercially purchased tea samples.
Review
Chemistry, Analytical
Jing Hu, Chenghui Li, Yafei Zhen, Hanjiao Chen, Juan He, Xiandeng Hou
Summary: This review article discusses the importance of chemical vapor generation as a sample introduction method in analytical atomic spectrometry over the past 50 years. It covers the historical background, recent advances, and future research directions of CVG in various media, providing insights for the development of this technique.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Liangbo He, Yao Lin, Yubin Su, Yuanyuan Li, Yurong Deng, Chengbin Zheng
Summary: In this study, a lithium-ion battery powered compact handheld optical emission spectrometer (OES) was developed for sensitive field analysis of waterborne arsenic. By utilizing electro-chemical hydride generation (ECHG) and miniaturized ballpoint discharge (mu PD) as sample introduction means and excitation source, the system showed promising potential for the sensitive, cost-effective, and environmentally friendly analysis of waterborne arsenic.
ANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Huajun Zhao, Jun Wang, Huaiyu Shao, Kang Xu, Yonghong Deng
Summary: This study investigates the sources and mechanisms of gas generation in lithium-metal batteries using in situ differential electrochemical mass spectrometry, and proposes mechanisms for electrolyte additives to mitigate these irreversible reactions.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Review
Instruments & Instrumentation
Yafei Zhen, Hanjiao Chen, Meng Zhang, Jing Hu, Xiandeng Hou
Summary: The study presents a method for enhancing the sensitive determination of rhenium by improving PVG efficiency using Cd2+ and Co2+, leading to a lower LOD under specific conditions.
APPLIED SPECTROSCOPY REVIEWS
(2022)
Article
Chemistry, Analytical
Eva Jenikova, Eliska Novakova, Jakub Hranicek, Stanislav Musil
Summary: Photochemical vapor generation (PVG) of Te4+ was achieved using a simple reactor and investigated for its application in the determination of Te in water samples. The study explored the composition of the reaction medium, the irradiation time, and the effects of sensitizers and interferents. The results showed that PVG could be used for sensitive determination of Te in water samples under optimized conditions.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Emanuela Pitzalis, Beatrice Campanella, Rachele Bonini, Massimo Onor, Alessandro D'Ulivo
Summary: The mechanisms controlling the generation of PbH4 in the reaction of Pb(II) with NaBH4 were investigated, with and without the presence of K3Fe(CN)6. PbH4 was identified for the first time using gas chromatographic mass spectrometry. It was found that without the additive, Pb(II) is converted to solid species and no volatile lead species can be detected. In the presence of K3Fe(CN)6, PbH4 is formed by the direct transfer of hydride from borane to lead atoms.
ANALYTICA CHIMICA ACTA
(2023)
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
Biophysics
Salah M. Tawfik, Mohamed R. Elmasry, Mirkomil Sharipov, Shavkatjon Azizov, Chang Hyun Lee, Yong-Ill Lee
BIOSENSORS & BIOELECTRONICS
(2020)
Article
Biochemical Research Methods
Shavkatjon Azizov, Mirkomil Sharipov, Jae-Min Lim, Salah M. Tawfik, Nuritdin Kattaev, Yong-Ill Lee
Summary: The study presents a novel microfluidic paper-based analytical device coupled with paper spray mass spectrometry for efficient and low-cost quantitative determination of C-18-ceramide as a prognostic biomarker. The device demonstrated high resistance to organic solvents and efficiency in sample analysis, achieving good recovery values in human serum samples. The method simplifies the experimental steps and operation process, allowing for the identification of subnanomolar concentrations of C-18-ceramide.
JOURNAL OF MASS SPECTROMETRY
(2021)
Review
Chemistry, Multidisciplinary
Salah M. Tawfik, Shavkatjon Azizov, Mohamed R. Elmasry, Mirkomil Sharipov, Yong-Ill Lee
Summary: Nanomicelles as drug carriers show potential in selective and efficient drug delivery, forming organized structures through self-assembly and releasing drugs in response to various stimuli. The properties of core and corona forming blocks determine the size and shape of nanomicelles.
Article
Biochemical Research Methods
Ji-Yeon Kim, Woo Hong Joo, Dong-Soo Shin, Yong-Ill Lee, Chin Fen Teo, Jae-Min Lim
Summary: This study expanded the quantitative glycomic toolbox by optimizing the MILPIG approach in baker's yeast, demonstrating the requirement for carbon-13 labeled glucose incorporation and method robustness. The quantitation of the inhibitory effect of the N-linked glycosylation inhibitor tunicamycin on the yeast glycan expression profile was also performed.
ANALYTICAL BIOCHEMISTRY
(2021)
Article
Polymer Science
Amr S. Ismail, Salah M. Tawfik, Amr H. Mady, Yong-Ill Lee
Summary: Nanocomposites of tungsten oxide (WO3) and zinc oxide (ZnO) enriched polyethylene sebacate (PES) were successfully prepared and characterized in this study. The nanocomposites showed promising electrical activity and antimicrobial effects against bacteria and fungi, indicating potential for use in various applications such as catalysis.
Article
Chemistry, Multidisciplinary
Ming Han, Yuwei Liu, Dong-Jin Qian, Yong-Ill Lee, Hong-Guo Liu
Summary: The study developed a modified liquid/liquid interfacial epitaxial growth method to successfully prepare large-area ultrathin ordered films. The formation of the ultrathin films was found to be a result of the synergistic effects of various factors, providing a new approach for fabricating larger-area thin films of amphiphilic molecules.
Article
Chemistry, Multidisciplinary
Yuwei Liu, Xiaona Cui, Yong-Ill Lee, Hong-Guo Liu
Summary: This study systematically investigated the self-assembly behavior of polystyrene-block-poly(2-vinylpyridine) at the liquid/liquid interface. Different primary morphologies of aggregates were obtained depending on the molecular structure of the block copolymers and the amount of chloroauric acid. The findings provide valuable insights into the self-assembly behavior of block copolymers at interfaces and offer a facile approach for fabricating functional structures.
Review
Chemistry, Multidisciplinary
Zayakhuu Gerelkhuu, Yong-Ill Lee, Tae Hyun Yoon
Summary: This review describes the potential applications of upconversion nanomaterials (UCNMs) in biomedical fields, including drug delivery, bioimaging, biosensing, and photodynamic therapy. The mechanisms, synthesis methods, and biological toxicity of UCNMs are discussed, and the prospects for clinical applications are explored.
Article
Chemistry, Multidisciplinary
Seong-Soo Lee, Mirkomil Sharipov, Won June Kim, Yong-Ill Lee
Summary: Poly(ionic liquids) (PILs) have been widely used for CO2 capture due to their resemblance to ionic liquids and properties of polymers. In this study, the amine-functionalized poly(vinylimidazole)-based PIL (PVIm-NH2) was successfully prepared and characterized as a chemosensor for CO2 gas detection. The detection limit of PVIm-NH2 in the presence of triethylamine (TEA) was found to be 2.86 x 10-3 M with R2 = 0.9906. The mechanism of PVIm-NH2 generating N-heterocyclic carbenes (NHCs) in the presence of TEA and their reaction with CO2 gas to form a carboxylic acid was investigated. Structural modifications of PIL were also shown to make it a promising candidate for chemosensor applications.
Article
Biotechnology & Applied Microbiology
Salah M. Tawfik, Atef S. Kobisy, Emad A. Badr, Ahmed H. Elged, Yong-Ill Lee
Summary: Microbial corrosion caused by microorganisms in the petroleum industry is a significant problem that can have severe environmental and economic consequences. Therefore, the development of innovative nonionic porous antimicrobial materials with diverse hydrophobic conjugated motifs is highly desirable.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Nanoscience & Nanotechnology
Phommachith Sonexai, Minh Van Nguyen, Bui The Huy, Yong -Ill Lee
Summary: The detection of harmful chemicals in the environment and for food safety is important, but traditional techniques are expensive and time-consuming. Surface-enhanced Raman spectroscopy (SERS) offers a powerful alternative for detecting low concentrations of chemical compounds and biomolecules. This study presents a reproducible method for producing Ag nanoparticles that can be used to create highly sensitive SERS substrates. The developed SERS substrate exhibits exceptional analytical performance and has the potential to be a valuable analytical tool for monitoring environmental contaminants.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Salah M. Tawfik, Ali A. Abd-Elaal, Yong-Ill Lee
Summary: The design of multifunctional sensors based on conjugated polythiophene-quantum dots shows promise for detecting Hg2+ and TATP. The sensor demonstrates good linear response to Hg2+ and TATP under optimized conditions.
Article
Materials Science, Multidisciplinary
Mirkomil Sharipov, Youngil Lee, Jinsol Han, Yong-Ill Lee
Summary: Stabilizing silver cations from reactive ink with PVP on HEC-modified paper induces the formation of silver metal nanoparticles, achieving uniform formation and high conductivity of silver nanoparticles. The modified paper prevents the formation of silver oxides and silver acetate salts, allowing for a lower curing temperature and high conductivity.
MATERIALS ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Pavithra V. Ravi, Daniel T. Thangadurai, Kasi Nehru, Yong Ill Lee, Devaraj Nataraj, Sabu Thomas, Nandakumar Kalarikkal, Jiya Jose
Article
Chemistry, Analytical
Bui The Huy, Nguyen Ngoc Nghia, Yong-Ill Lee
MICROCHEMICAL JOURNAL
(2020)
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)
