Article
Chemistry, Applied
Wael I. Mortada, Mohamed M. El-Defrawy, Eman Erfan, Hala A. El-Asmy
Summary: A preconcentration procedure based on cloud point extraction and back-extraction was developed for speciation of inorganic vanadium. The method involves the use of CPE technique, complex formation, and back-extraction steps to achieve the separation and determination of different vanadium species.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2022)
Article
Chemistry, Analytical
Vladimir N. Losev, Svetlana L. Didukh-Shadrina, Anastasia S. Orobyeva, Sergey I. Metelitsa, Elena V. Borodina, Urana V. Ondar, Pavel N. Nesterenko, Natalia V. Maznyak
Summary: A simple and efficient method for the determination of highly toxic arsenic species using noncovalently aminated silica was proposed. The method allows for the effective preconcentration of arsenic anionic species from aqueous solutions, with separate preconcentration and determination of As(V) and As(III) at pH 5.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Applied
Francisco L. F. da Silva, Francisco E. H. Lima, Davino M. Andrade Neto, Fernando L. de Menezes, Lillian M. U. D. Fechine, Abdullah Akhdhar, Livia P. D. Ribeiro, Ana R. A. Nogueira, Pierre B. A. Fechine, Gisele S. Lopes, Wladiana O. Matos
Summary: An alternative analytical method using ICP OES was developed for quantifying inorganic arsenic (iAs) in rice. Iron nanoparticles modified with an organophosphorus compound were used to extract iAs from the plant matrix. The proposed method demonstrated satisfactory precision, LOD, and LOQ, with tAs contents between 0.090 and 0.295 mg kg-1 and iAs mass fractions between 0.055 and 0.109 mg kg-1 in rice samples.
Article
Geochemistry & Geophysics
Juan Xu, Yulong Guo, Shouye Yang, Simon V. Hohl, Wen Zhang
Summary: This study developed a calculation method for SiO2 concentrations in sediment samples based on the mass balance principle. The method showed good accuracy and precision and had the advantages of low sample consumption, high efficiency, and saving time and labor costs compared to separate sample preparation and analysis.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Chemistry, Analytical
Jedrzej Proch, Przemyslaw Niedzielski
Summary: This study presented the independent application of two hyphenated techniques, HPLC-MIP OES and HPLC-ICP OES, for iron speciation analysis. By optimizing and validating both methods, it was concluded that HPLC-MIP OES has significant potential for the analysis of iron speciation.
Article
Chemistry, Analytical
Caixia Yan, Xiaofang Yang, Zhengui Li, Yong Liu, Shengchun Yang, Qingwen Deng, Xiaodong Wen
Summary: In this study, switchable hydrophilicity solvent-based extraction (SHSE) was combined with inductively coupled plasma-optical emission spectrometry (ICP-OES) for the determination of trace lead (Pb) in environmental water and soil samples. By adding non-ionic surfactant Triton X-114 (TX-114), the sensitivity was significantly improved and satisfactory results were obtained, demonstrating a promising, simple and sensitive approach for the determination of trace Pb in environmental samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Hilal Ahmad, Bon Heun Koo, Rais Ahmad Khan
Summary: A new nano-sorbent Fe3O4@beta-lg was developed for selectively binding As(III) ions over As(V) ions at a wider pH range, which was effectively used for evaluating As(III) species in ecological water samples. The proposed method has a low detection limit and high recovery rate.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Analytical
Susanta Kumar Pradhan, Balram Ambade
Summary: The study successfully utilized a specific extraction method to determine thorium, lanthanides, and uranium under different pH conditions, validating the effectiveness of the approach. Experimental results indicate that the method demonstrates a high degree of accuracy and precision when compared with other standard techniques.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Spectroscopy
J. M. Joshi, Garima Pandey, Kaushik Sanyal, Smita Govalkar, A. U. Renjith, N. L. Mishra, Sangita Dhara
Summary: Hafnium, a valuable metal found in association with zirconium ores, requires accurate analysis for recovery processes. A TXRF method was developed for chemical characterization of Hf containing solution samples, with the advantage of analyzing solid samples directly without dissolution, requiring small amounts of samples, and being economical and fast. The TXRF results were compared with ICP-OES results and found to be in good agreement.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Herick Macedo Santos, Julymar Marcano Higuera, Ana Rita Araujo Nogueira
Summary: Multi-energy calibration (MEC) and high matrix introduction (HMI) system were used to directly analyze simulated gastrointestinal chyme and estimate the bioaccessibility of essential elements and As in shrimp. The results showed that the proposed procedures were accurate and efficient, with no significant differences compared to the reference method. Heat treatment increased the bioaccessibility of Cu and Fe, but decreased the bioaccessibility of Zn. The procedures provide simplicity and high sample throughput for elemental bioaccessibility studies.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Polymer Science
Huda Alsaeedi, Hilal Ahmad, Malak Faisal Altowairqi, Afnan Abdullah Alhamed, Ali Alsalme
Summary: Cellulose nanoparticles were synthesized and covalently functionalized with multi-functional group for their excellent application in environmental remediation technology. The hybrid material demonstrated excellent adsorption properties for simultaneous extraction of multiple metal ions. The sorbent exhibited a sorption capacity in the range of 1.8-2.2 mmol/g. The method was successfully employed for simultaneous extraction and determination of Pb(II), Cd(II) and Cu(II) from real-world samples, with a preconcentration limit of 0.7 ppb and a detection limit of 0.4 ppb.
Article
Engineering, Environmental
Vladimir N. Losev, Svetlana L. Didukh-Shadrina, Anastasya S. Orobyeva, Sergey I. Metelitsa, Alexander S. Samoilo, Anatoly M. Zhizhaev, Anatoly K. Trofimchuk
Summary: Amino-immobilized silicas were used for the first time for chromium speciation. The results showed that this method can effectively separate Cr(VI) and Cr(III) with good application prospects in technological solutions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Wael Mortada, Aya A. Awad, Mohamed M. El-defrawy, Magdi E. Khalifa
Summary: An eco-friendly and selective method was developed for the determination of Th4+ in the presence of various ions. The method showed high accuracy and efficiency, with a wider analytical range and lower detection limit compared to other published procedures.
MICROCHEMICAL JOURNAL
(2021)
Article
Environmental Sciences
Sezin Erarpat, Cansu Demir, Miray Oner, Sezgin Bakirdere
Summary: A hyphenated instrumental method combining HPLC and ICP-OES was developed for the precise determination of Cr(III) and Cr(VI) in soil, grass, and water samples. The method showed high accuracy and applicability.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Chemistry, Analytical
John T. Sloop, Sean C. Allen, Jake A. Carter, George L. Donati, Bradley T. Jones
Summary: A two-point calibration method based on SDA was used to accurately analyze complex-matrix samples, requiring only two calibration solutions per sample. The method calculates analyte concentration by utilizing the slope and intercept of an analyte vs. IS plot, the analyte concentration in the standard added to S1, and the signal intensity of the IS in S1. This approach yielded similar or superior results compared to EC, IS, and SA methods, without the need for mixing solutions or additional equipment modifications.
MICROCHEMICAL JOURNAL
(2021)
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)