Journal of Analytical Chemistry最新文献

{"title":"Separation and Preconcentration of Particles in a Rotating Coiled Column Using a Water–Oil System: Theoretical Basis, Practical Capabilities, and Development Prospects","authors":"M. S. Ermolin","doi":"10.1134/S1061934826700346","DOIUrl":"10.1134/S1061934826700346","url":null,"abstract":"<p>Two-phase liquid systems of the water–oil type are actively used for the separation and preconcentration of various substances. Countercurrent chromatography is an effective method for the separation and preconcentration of organic and inorganic substances. However, this method is not currently used for the separation of solid particles. This paper describes driving forces of the particle separation process using two-phase liquid systems and modeling of the process of the extraction of microplastic in a rotating coiled column in a water–oil system, and formulates the capabilities and prospects for the development of this method for particle separation.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"788 - 796"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative Assessment of Greenness, Detection, and Removal Efficiency of Brilliant Blue Dye Using Zein and Zein-Modified Magnetite Nanoparticles via Dispersive Solid-Phase Microextraction Coupled with Ultraviolet–Visible Spectrophotometry","authors":"Wasan A. Al-Uzri,&nbsp;Hind Hadi,&nbsp;Tabarak Mohammed,&nbsp;Khanda F. M. Amin","doi":"10.1134/S106193482670036X","DOIUrl":"10.1134/S106193482670036X","url":null,"abstract":"<p>In this comparative study, green and simple methods were developed for extracting and preconcentrating Brilliant Blue dye from environmental water samples using dispersive solid-phase microextraction (<b>DSPµE</b>) coupled with ultraviolet−visible spectrophotometry. Two adsorbents, zein nanoparticles (<b>ZNP</b>s) and benzalkonium-coated zein-functionalized magnetite nanoparticles (<b>Fe</b>_<b>3</b><b>O</b>_<b>4</b><b>@Zein@BZC</b>), were evaluated and compared. Various experimental parameters, including sample pH, buffer concentration, adsorbent dosage, extraction time, ionic strength, and the type and volume of the eluent, were thoroughly investigated and optimized for both adsorbents to determine the most effective extraction conditions. Under the selected conditions, linearity was achieved in the ranges of 0.025–1.00 µg/mL for DSPµE-ZNPs and 0.05–2.0 µg/mL for DSPµE-Fe₃O₄@Zein@BZC, with correlation coefficients (<i>r</i>²) greater than 0.99. The limits of detection were found to be 7 and 9 ng/mL, respectively. The proposed methods were effectively applied to real water samples, including canal, tap, and river water, achieving recovery percentages between 97.0 and 102.0% for both adsorbents, with relative standard deviations below 3% (<i>n</i> = 5). Greenness and whiteness evaluations were conducted for both adsorbents to assess their environmental profiles comprehensively. Three greenness tools (complex metric for green analytical procedure index, MoGAPI; analytical greenness metric for sample preparation, AGREEprep; and sample preparation metric of sustainability, SPMS) were used to perform greenness and whiteness evaluations, as well as thorough calculations of sample, extraction, and preparation procedures, and the degree of whiteness was ascertained using the red-green-blue scale.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"824 - 843"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase Composition and Crystal Structure Analysis of Mineral Admixtures Using X-ray Diffraction and Rietveld Refinement","authors":"Xiying Yang,&nbsp;Ji Wang,&nbsp;Lixia Wang","doi":"10.1134/S1061934825602786","DOIUrl":"10.1134/S1061934825602786","url":null,"abstract":"<p>This study addresses critical limitations in conventional mineral admixture characterization methods—namely insufficient qualitative analysis, cumbersome quantitative procedures, and lack of structural information—by applying the well-established X-ray diffraction (<b>XRD</b>) Rietveld full-pattern fitting approach. The methodology, though mature in XRD analysis, is innovatively applied to mineral admixtures to enable simultaneous qualitative identification, quantitative analysis, and crystal structure refinement of multiphase systems. Simultaneously, it serves as a practical reference for the application of Rietveld refinement in the phase analysis of mineral admixtures and similar inorganic materials in engineering scenarios. Validation was performed using simulated samples (1–6) with predefined crystalline/amorphous compositions and a real-world highway construction admixture (7). Key findings demonstrate high precision for multiphase crystalline systems, with absolute errors &lt; ±3% and Rietveld agreement indices (R_wp &lt; 4.76%, S ≤ 1.55) confirming reliability; effective differentiation of polymorphs (e.g., anatase <i>versus</i> rutile TiO₂), overcoming limitations of chemical analysis; robust quantification of amorphous content (e.g., SiO₂) <i>via</i> internal standardization, though with higher variability (RSD ≤ 4.86%) due to diffuse scattering; minimal refinement deviations in structural parameters (lattice constants Δ &lt; 0.001 nm, atomic positions Δ &lt; 0.004) versus reference data. A practical mineral admixture (five phases including SiO₂/SnO₂) was successfully analyzed with reliable fitting quality (R_wp = 6.74%, S = 1.72), meeting the general reliability criteria for multiphase sample analysis (R_wp &lt; 10%, S = 1.0–2.0) and confirming the method’s strong applicability in engineering practice. The framework provides a foundation for evaluating admixture quality, elucidating concrete performance mechanisms, and designing advanced cementitious materials, while offering broader applications in inorganic phase analysis.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"811 - 823"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of Bioavailable Heavy Metal Species in Soils Sampled from the Area of the Karabash Copper Smelter","authors":"E. Yu. Savonina,&nbsp;A. E. Kozlov,&nbsp;I. N. Gromyak,&nbsp;T. A. Maryutina","doi":"10.1134/S1061934826700322","DOIUrl":"10.1134/S1061934826700322","url":null,"abstract":"<p>The most readily accessible species of heavy metals (Cu, Zn, Pb, and Cd) in terms of biological availability were isolated from soil samples collected in the impact zone of the Karabash Copper Smelter using the flow extraction method. Leaching of the exchangeable/water-soluble and acid-soluble species of the elements was carried out in a flow-through mode in a microcolumn using aqueous solutions of 0.05 M Ca(NO₃)₂ and 0.43 M CH₃COOH, respectively. The concentrations of elements in the resulting solutions were determined by atomic emission spectrometry. The concentrations of bioavailable species of copper and zinc in the collected soil samples reached 70% of the total content, and it was higher than the MPC values by factors of tens and hundreds (depending on the sampling depth). In most cases, copper was characterized by the predominance of acid-soluble species, while zinc was characterized by the predominance of an exchange species. Cadmium was present in soils only in an exchangeable species (up to 58%) at the most contaminated sampling site. The concentration of lead in biologically available species exceeded the MPC values by a factor of 5–15 and amounted to 10–30% of the total content. Lead in this form was found only at a depth of no more than 10 cm.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"770 - 779"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon Fiber Modified with Santa Barbara Amorphous-15 for In-Syringe Solid-Phase Extraction of Benzene Derivatives","authors":"Ryon-Hui Pak,&nbsp;Hyon-Tae Pak,&nbsp;Chol-San Jon,&nbsp;Yu-Jong Kim,&nbsp;Jong-Gu Song,&nbsp;Yong-Gil Pak,&nbsp;Song-Ryong Kim","doi":"10.1134/S1061934825604256","DOIUrl":"10.1134/S1061934825604256","url":null,"abstract":"<p>A method of in-syringe solid-phase extraction (<b>SPE</b>) using carbon fiber modified with Santa Barbara amorphous-15 (<b>CF-SBA-15</b>) as an adsorbent, coupled with gas chromatography-mass spectrometry, was developed for the determination of benzene derivatives in seawater samples. Carbon fiber was modified with amine-functionalized SBA-15 to prepare CF-SBA-15 through covalent functionalization. Fabricated CF-SBA-15 was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction, confirming the successful modification of CF with SBA-15 and its ordered hexagonal mesoporous structure. As a novel in-syringe SPE adsorbent, it was used for the determination of 12 benzene derivatives by gas chromatography-mass spectrometry. Benzene derivatives could be completely adsorbed on CF-SBA-15 during one adsorption cycle, indicating effective extraction with a short time. Under the optimized extraction and elution conditions, the linear ranges were 0.1–500 ng/mL with regression coefficients above 0.9960, the limits of detection were 0.008–0.25 ng/mL, and intra- and inter-day relative standard deviation values were below 12.8% in standard and seawater samples. The enrichment factor (<b>EF</b>), recovery (<b>R</b>), and matrix effect (<b>ME</b>) were investigated, indicating that CF-SBA-15 is selective and quantitative for the extraction of all analytes (EF: 17.1–19.4, R: 85.6–96.8%, and ME: 86.0–110.5%). The proposed method was applied to the determination of benzene derivatives in seawater samples.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"854 - 862"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using Additive Technologies in the Development of Analytical Filtration Systems","authors":"M. D. Panchenko,&nbsp;T. V. Danilova,&nbsp;V. M. Shkinev,&nbsp;D. A. Trofimov","doi":"10.1134/S1061934826700310","DOIUrl":"10.1134/S1061934826700310","url":null,"abstract":"<p>This article demonstrates the potential of using additive technologies to modify membrane analytical systems as a logical continuation of research into optimizing the design of original membrane filtration units developed in the Laboratory of Preconcentration Methods of the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences under the active participation and guidance of Boris Yakovlevich Spivakov, Corresponding Member of the Russian Academy of Sciences. The stages of creating these membrane systems and their application in environmental analysis are described. The potential of using additive technologies, particularly photopolymer 3D printing, for creating membrane concentration devices is substantiated. It is demonstrated that the use of modern software tools for creating new functional modules and finding promising solutions in fractionation, concentration, and filtration can influence the future of this field.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"762 - 769"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-Response Optimization Using Various Multi-Attribute Decision Making Methods and Regression Model in a Chromatographic Method","authors":"Ju-Song Kim,&nbsp;Won-Gil Ri,&nbsp;Myong-Ho Kye,&nbsp;Ryong-Jin Jon,&nbsp;Yong-Myong Jo,&nbsp;Won-Chol Yang","doi":"10.1134/S1061934825602956","DOIUrl":"10.1134/S1061934825602956","url":null,"abstract":"<p>High-performance liquid chromatography (<b>HPLC</b>) analysis is widely used in many analytical fields such as clinical, forensic, toxicology, environmental, and pharmaceutical analyses. The aim of this work is to develop an HPLC method for determining glimepiride in a supersaturatable self-nanoemulsifying formulation. This paper proposed an effective methodology for chromatographic multi-response optimization based on design of experiments and multi-attribute decision making. By applying the methodology, the optimal values of the HPLC factors were determined as 30% acetonitrile, pH 3.8, a flow rate of 0.9 mL/min, an injection volume of 12.9 μL, a column temperature of 36.4°C, and a buffer molarity of 13.6 mM, respectively. The influence analysis and optimization results of the chromatographic method were compared with the results of the Taguchi method. The results obtained from the former approach were well coincided with the results obtained from the latter method. This method is fast and easy to use, while giving satisfactory results under certain conditions. The proposed approach may be widely used to optimize process parameters in engineering practice.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"844 - 853"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced Extraction Systems for Analytical and Technological Tasks","authors":"O. B. Mokhodoeva,&nbsp;V. M. Shkinev","doi":"10.1134/S1061934826700309","DOIUrl":"10.1134/S1061934826700309","url":null,"abstract":"<p>The role of new extraction systems in liquid-liquid extraction methods is key and transforming. First and foremost, it is important to note the shift from classical water-organic solvent extraction systems to alternative two-phase systems based on water-soluble polymers, ionic liquids, and deep eutectic solvents. Recently, considerable attention has been devoted to the study of these compounds in extraction processes, due to their environmental friendless, as well as the unlimited possibilities for molecular design and integration into modern analytical schemes and technological processes. This work describes new extraction systems applicable to the selective recovery of strategically important metals and compounds from natural and industrial sources.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"756 - 761"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Stabilization of a Paper-Based Biosensor for the On-Site Detection of Pesticide Residues on Fruits and Vegetables","authors":"Pravin Pokhrel,&nbsp;Krisha Pokharel,&nbsp;Basant Giri","doi":"10.1134/S1061934825603846","DOIUrl":"10.1134/S1061934825603846","url":null,"abstract":"<p>The widespread use of organophosphate pesticides poses significant environmental and public health risks, necessitating the development of low-cost, sensitive, and portable detection systems. Here, the development and optimization of a field-deployable paper-based colorimetric biosensor (pesticide paper-based analytical device, <b>PAD</b>) for the detection of acetylcholinesterase inhibitors is reported, using indoxyl acetate (<b>IOA</b>) and acetylthiocholine chloride (<b>ATCh</b>) as chromogenic substrates. Assay conditions were systematically optimized for enzyme and substrate concentrations, and incubation time. Kinetic analysis revealed a lower <i>K</i>_m for IOA (1.0 ± 0.2 mM) compared to ATCh (6.6 ± 3.2 mM), indicating stronger substrate affinity, while ATCh exhibited a higher V_max (123.8 ± 6.1 kat), supporting faster signal generation. Ethyl-paraoxon was used as a model pesticide to establish inhibition-based calibration curves. The IOA-based method demonstrated superior sensitivity (limit of detection 0.09 ppm), whereas ATCh provided a broader detection range (1.56–100 ppm). Spike recovery from produce samples yielded recoveries ranging from 59–86%. To enable field deployment, a novel sandwich method of stabilization was developed to preserve both enzyme and substrate activity on paper for over five months at ambient conditions. This stabilization approach maintained ~90% enzymatic activity and enhanced substrate signal intensity, overcoming a major limitation of paper-based biosensors. Pesticide PAD platform offers a promising tool for rapid, on-site pesticide screening with minimal equipment, supporting food safety and environmental monitoring in low-resource settings.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"863 - 872"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"6-Methylthiocoumarin-3-Carboxylic Acid as a Simple Chemosensor for the Fluorescence Detection of Hypochlorite in Aqueous Solution","authors":"Hongqi Li,&nbsp;Xinyan Jia,&nbsp;Baijun Zhao,&nbsp;Yanxi Song,&nbsp;Wan Zou,&nbsp;Haoran Chen","doi":"10.1134/S1061934825603949","DOIUrl":"10.1134/S1061934825603949","url":null,"abstract":"<p>Development of fluorescent probes with good water -solubility and a wide applicable pH range for highly selective and sensitive detection of hypochlorite in aqueous solution was of great significance and was challenging. A methylthio-substituted coumarin-based fluorescent probe was synthesized and characterized. The probe could be utilized for fluorescence turn-off detection of hypochlorite in acetonitrile/phosphate-buffered saline solution (4 : 6, v/v, 10 mM, pH 7.4). The probe displayed an excellent selectivity over other competitive species and featured a fast response (less than 20 s). It could be used for quantitative determination of hypochlorite concentration within the range of 0–36 μM, and the limit of detection was calculated to be as low as 0.47 μM. The probe was applicable for sensing hypochlorite in a broad pH range of 4–10 and was successfully utilized for the detection of HClO in real water samples.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"873 - 879"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}