Article
Chemistry, Analytical
Mais Al-Nidawi, Ozgur Ozalp, Usama Alshana, Mustafa Soylak
Summary: Synergistic cloud point microextraction (SCPME) simplifies and accelerates traditional cloud point extraction (CPE) by using medium- to long-chain alcohols to reduce the cloud point temperature of the surfactant. SCPME-UV/Vis method was successfully applied for the extraction and determination of curcumin in food samples.
ANALYTICAL LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Kiril Blazhev Gavazov, Petya Racheva, Nikolina P. Milcheva, Vidka V. Divarova, Denitsa Dimitrova Kiradzhiyska, Fatma Genc, Antoaneta D. Saravanska
Summary: The hydrophobic azo dye HTAR was studied in the context of centrifuge-less cloud point extraction (CL-CPE) and spectrophotometric determination of cobalt traces. The developed method is simple, cheap, sensitive, convenient, and environmentally friendly.
Article
Chemistry, Physical
Nuket Kartal Temel, Mehtap Copur
Summary: In this study, an ultrasonic-assisted cloud point extraction (UA-CPE) method was developed for the determination of Co(II) in spices. The Co(II) contents of the samples were determined by UV-VIS after extraction and preconcentration. The optimized method achieved a LOD of 0.76 μg L-1 and a LOQ of 2.59 μg L-1 for Co(II), with a rectilinear calibration curve in the range of 1-10 and 10-210 μg L-1.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Analytical
Weiting Liu, Meiyi Xie, Xiaotang Hao, Qian Xu, Xun Jiang, Tiantian Liu, Mei Wang
Summary: A novel method was developed for preconcentration and determination of five polar phenolic compounds by using RS-CPE. The optimized method is simple, cost-effective, and achieved recovery rates ranging from 85.6% to 108%.
MICROCHEMICAL JOURNAL
(2021)
Article
Spectroscopy
Petya Racheva, Nikolina P. Milcheva, Fatma Genc, Kiril B. Gavazov
Summary: A simple, cost-effective, and environmentally friendly cloud point extraction method was developed to concentrate traces of Cu(II) for spectrophotometric determination. The method is based on a complexation reaction with the hydrophobic azo reagent HTAR, with specific experimental conditions determined for optimal Cu(II) determination. The proposed procedure was successfully applied to water samples and saline solution analysis, showing practical value in real-world applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Nikolina P. Milcheva, Fatma Genc, Petya Racheva, Vassil B. Delchev, Vasil Andruch, Kiril B. Gavazov
Summary: A simple, low-cost, and environmentally friendly cloud point extraction method was developed for preconcentration of trace vanadium, followed by spectrophotometric determination. Optimal experimental conditions were determined for total vanadium determination, and the accuracy of the proposed method was verified through analysis of environmental matrix reference material. The greenness of the developed method was evaluated using the Green Analytical Procedure Index.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Analytical
Qiao Feng Wang, Yan Qiu Zhao, Jiang Bing Sun, Jun Zhou
Summary: A novel reinforced cloud point extraction coupled with ionic liquid (RCPE-IL) method was developed for the preconcentration and extraction of five monoterpene glycosides in Paeonia suffruticosa flower samples, achieving satisfactory results in terms of linear range, calibration curve correlation coefficients, limit of detection, and recoveries.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Nazime Ebrar Karlidag, Rabia Demirel, Hakan Serbest, Fatma Turak, Sezgin Bakirdere
Summary: In this study, a method for the determination of trace levels of cobalt was proposed using a flame atomic absorption spectrophotometry system after magnetic hydrogel based dispersive solid phase extraction. The method showed improved detection power compared to conventional FAAS and demonstrated accuracy in quantification of cobalt in chamomile tea matrix.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Analytical
Sonia Ratnani, Vinay Kumar Singh, Narinder Kumar Agnihotri
Summary: A highly sensitive and green method using derivative spectrophotometry has been developed to determine trace levels of Cd(II) ions in the presence of a non-selective reagent and a cationic surfactant. The method is highly sensitive and selective, and can be used for the simultaneous determination of Cd(II) and Co(III) ions.
JOURNAL OF ANALYTICAL CHEMISTRY
(2022)
Article
Spectroscopy
Khadiga M. Kelani, Maha A. Hegazy, Amal M. Hassan, Mahmoud A. Tantawy
Summary: Several selective spectrophotometric techniques were developed for the determination of the antidiabetic drug omarigliptin and its degradation products. The methods were validated and found to be effective for quantification and quality control purposes.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Applied
Mehdi Safdarian, Payman Hashemi, Alireza Ghiasvand
Summary: The study applied the CPE-CCT method for rapid preconcentration and UV-Vis spectroscopy of beta-carotene in fruit juice samples, achieving a low detection limit and wide linear range through parameter optimization. Compared to direct HPLC method, CPE-CCT method offers advantages of simplicity, portability, and cost-effectiveness.
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
Environmental Sciences
Pei Li, Caijiao He, Daohui Lin
Summary: A new method for extracting and quantifying nanoplastics from biological samples was developed in this study. The method involved alkaline digestion, cloud point extraction, and gold nanoparticles formation for quantification using single particle inductively coupled plasma mass spectrometry. The method was proven to be efficient and sensitive, allowing for accurate quantification of different sizes and surface functionalities of polystyrene nanoparticles. The method was validated using representative organism samples and showed good recovery rates and low limits of detection, making it a useful approach for studying the environmental behavior and toxicity of nanoparticles.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Denys Snigur, Dmytro Barbalat, Alexander Chebotarev, Anastasiia Synievyd, Kateryna Bevziuk
Summary: A novel cloud point extraction method at room temperature was developed for preconcentration of Molybdenum(VI) binded with 6,7-dihydroxy-2,4-diphenylbenzopyrylium perchlorate. The method showed good accuracy and sensitivity in rapidly extracting the target analyte for detection.
Review
Chemistry, Analytical
Ebaa Adnan Azooz, Mustafa Tuzen, Wael Mortada, Naeem Ullah
Summary: This review summarizes the application of different extraction methods for selenium extraction and determination, including microextraction, solid-phase extraction, and liquid-phase microextraction. It also discusses the use of different dispersive media to enhance selenium separation and the application of environmentally friendly solvents. Additionally, it provides a summary of cheap, simple, and accurate techniques that have not yet been used.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)