Journal of Analytical Chemistry最新文献

{"title":"Sorbent Based on a Copolymer of Maleic Anhydride with Methacrylic Acid for the Preconcentration of Thorium(IV) and Uranium(VI) Ions","authors":"F. N. Bahmanova,&nbsp;S. Z. Hamidov,&nbsp;F. M. Chyragov","doi":"10.1134/S1061934826700218","DOIUrl":"10.1134/S1061934826700218","url":null,"abstract":"<p>In this work, the results of a study on the extraction and preconcentration of trace amounts of thorium(IV) and uranium(VI) with a polymer chelating sorbent are presented. For the sorption-photometric determination of Th(IV) and U(VI), a modified sorbent based on a copolymer of maleic anhydride with methacrylic acid is proposed. The static exchange capacity of the obtained sorbent for the K⁺ ion was 9.3 mmol/g. The optimal sorption conditions were determined. At pH 4, the degree of sorption passes through a maximum. With an increase in the concentration of Th(IV) and U(VI), in the solution, the amount of absorbed metal increases, and at a concentration of 8 × 10^–3 M it becomes maximum (<i>c</i>_Th(IV) = 696 mg/g and <i>c</i>_U(VI) = 596 mg/g). The sorption isotherm of Th(IV) and U(VI) with the synthesized sorbent was constructed. The dependence of sorption on time and ionic strength of the solution was investigated. Sorption equilibrium is achieved within 1 h of contact of the solution with the sorbent. It was found that at pH 4, the maximum metal sorption is achieved using 50 mg of the sorbent. The effect of different mineral acids (HClО₄, H₂SO₄, HNО₃, HCl) with the same concentrations on the desorption of Th(IV) and U(VI) from the sorbent was studied. The results showed that the maximum desorption of Th(IV) and U(VI) occurs in chloric acid. The developed method was applied to determine microquantities of Th(IV) and U(VI) in water taken from the well of the Balakhany oil and gas production department (Azerbaijan) with preconcentration.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"634 - 639"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808183","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 of a Lateral Flow Immunoassay Strip Using Self-Paired Monoclonal Antibody for the Rapid Detection of Xanthomonas axonopodis pv. Citri","authors":"Siyuan Zhao,&nbsp;Yafang Wu,&nbsp;Yinglin Wang,&nbsp;Dezhi Li,&nbsp;Xudong Guo,&nbsp;Wenjun Zhao,&nbsp;Qing Liu","doi":"10.1134/S106193482560297X","DOIUrl":"10.1134/S106193482560297X","url":null,"abstract":"<p>Citrus canker (<b>CC</b>), caused by <i>Xanthomonas axonopodis pv. citri</i> (<b><i>Xac</i></b>), is a devastating bacterial disease that poses a severe threat to citrus production globally. Outbreaks of <i>Xac</i> infections often result in substantial economic losses to the citrus industry, underscoring the urgent need for rapid, reliable, and on-site detection tools to facilitate timely disease management. In this study, a specific monoclonal antibody (<b>mAb</b>), designated 4C3, was generated, and a self-paired gold nanoparticle (<b>AuNP</b>)-based lateral flow immunochromatographic strip (<b>LFIS</b>) was subsequently developed. The AuNPs used were spherical with an average diameter of 40.2 ± 2.3 nm and were synthesized <i>via</i> trisodium citrate reduction of chloroauric acid. Using mAb 4C3 as both the capture antibody and the gold-labeled detector antibody, the performance of the developed AuNPs-LFIS was systematically evaluated. Under optimal conditions, the strip exhibited: (1) a working concentration range of 1 × 10⁵–1 × 10⁸ CFU/mL for <i>Xac</i>; (2) a detection limit of 1 × 10⁵ CFU/mL; and (3) results visually interpretable within 10 min without specialized equipment. For plant sample testing, pretreatment involved homogenizing citrus leaves/pericarps in Luria–Bertani medium, centrifuging at 5722 <i>g</i> for 10 min, and filtering the supernatant through a 0.22 μm membrane. Furthermore, the AuNPs-LFIS showed excellent specificity: it successfully detected six geographically distinct wild <i>Xac</i> isolates, while no cross-reactivity was observed with 12 other common plant pathogenic bacteria. Importantly, the strip also demonstrated reliable performance in the detection of <i>Xac</i> in artificially inoculated or naturally infected citrus leaf samples, confirming its applicability for real-world field testing. To the best of current knowledge, this is one of the first reports of a self-paired colloidal gold LFIS that enables specific <i>Xac</i> detection using a single mAb. This simplified design not only reduces the complexity and cost of strip production but also maintains high sensitivity and specificity, making it a promising tool for the rapid surveillance, early diagnosis, and effective control of CC.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"681 - 692"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808265","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":"Simultaneous Determination of Residues of the Most Important Veterinary Drugs in Environmental Samples by Chromatography-Mass-Spectrometry","authors":"D. Yu. Nekrasov,&nbsp;O. I. Lavrukhina,&nbsp;I. V. Batov,&nbsp;A. V. Tret’yakov","doi":"10.1134/S1061934826700152","DOIUrl":"10.1134/S1061934826700152","url":null,"abstract":"<p>A method for the determination of residues of 19 veterinary drugs (sulfonamides, coccidiostats, NSAIDs, fluoroquinolones, macrolides, lincosamides, and tetracyclines) in environmental objects using high-performance liquid chromatography with tandem mass spectrometry detection is developed. A universal sample preparation method using liquid-liquid extraction is proposed for analyzing soil, water, and plant samples. The accuracy of the analysis is ensured by the addition of isotopically labeled standards. The developed approach enables the simultaneous determination of residues of enrofloxacin, ciprofloxacin, ofloxacin, oxytetracycline, doxycycline, tetracycline, sulfamethazine, sulfamethoxazole, sulfadiazine, trimethoprim, erythromycin, clarithromycin, tylosin, tilmicosin, spiramycin, diclofenac, lasalocid, maduramicin, and lincomycin in environmental objects with minimal sample preparation. The lower limit of detection for most analytes does not exceed 5 μg/L (μg/kg). Analysis time is 30 min.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"562 - 570"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808202","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":"High-Efficiency Alternating Current-Electrokinetic Micromixer: Design, Simulation, and the Role of Sidewall Obstacles","authors":"Elnaz Poorreza,&nbsp;Nader Ahmadzadeh Khosroshahi","doi":"10.1134/S1061934825601045","DOIUrl":"10.1134/S1061934825601045","url":null,"abstract":"<p>Electrokinetic flow is a special category of fluid flow driven by or subjected to electric body forces, which are regulated by a series of determinants including the strength and structure of the electric field, frequency, electric permittivity/conductivity, and fluid viscosity, among others. Efficient and rapid micromixing of fluids, which constitutes one of the fundamental operations in microfluidic devices, can enable a wide range of applications, from biochemical reactions to medical diagnostics and beyond. In the case of microfluids, successful micromixing becomes challenging to obtain in pure linear microchannels or in the absence of external field perturbations due to the prevalence of laminar flow conditions in such systems. In this work, an electroosmosis-based micromixer has been designed to combine two different fluids. To enhance the efficiency of this mixing system, a sinusoidal electric potential is imposed systematically across the electrodes with a peak value of 0.1 V and an operating frequency of 8 Hz. In order to enhance the efficiency of the micromixer, rectangular-shaped obstacles have been added along the micromixer sidewalls. Based on this structure, the results of the simulation demonstrate that the micromixer attains an excellent efficiency of the order of 96%, thus emphasizing its immense potential for useful applications in a wide range of disciplines, with special reference to microfluidics, biochemistry, and biomedical sciences.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"640 - 650"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808216","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":"Gas Chromatographic Determination of Acyclic and Cyclic Organic Carbonates in Aqueous Environment","authors":"M. G. Pervova,&nbsp;M. A. Samorukova,&nbsp;V. I. Saloutin","doi":"10.1134/S1061934826700255","DOIUrl":"10.1134/S1061934826700255","url":null,"abstract":"<p>Procedures for the determination of organic carbonates (acyclic and cyclic) in aqueous media are proposed. It is found that headspace extraction is the most suitable method for extracting acyclic carbonates, while salting-out solvent extraction is the most suitable method for extracting cyclic carbonates. The conditions for the extraction methods are selected and optimized. The detection limits are 0.06–0.07 mg/L for acyclic carbonates and 0.5–1.5 mg/L for cyclic carbonates. The procedures are simple, do not require complex sample preparation, and the error in results does not exceed 10%. The residual content of organic carbonates in solutions of distilled or seawater after exposure to open air at 25°C is studied. It is found that, regardless of the density of the aqueous medium, acyclic carbonates do not undergo any transformations in the aqueous medium but instead migrate to the air phase, propylene and ethylene carbonates remain unchanged in the aqueous medium, while vinylene carbonate does not migrate to the air but undergoes chemical transformation in the aqueous phase.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"672 - 680"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808217","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":"Portable Chalcogenide Quantum Dot-Based Sensing System for Heavy Metal Cation Detection","authors":"V. S. Kulik,&nbsp;E. D. Gribova,&nbsp;S. A. Novikova,&nbsp;N. N. Troshkina","doi":"10.1134/S1061934826700139","DOIUrl":"10.1134/S1061934826700139","url":null,"abstract":"<p>This study proposes a rapid approach for determining heavy metal cation content in natural and wastewater solutions by monitoring changes in the optical properties of multilayer chalcogenide quantum dots (QDs) with various stabilizing coatings. CdTe/CdS/ZnS QDs were synthesized via an aqueous colloidal method using 3-mercaptopropionic acid, L-cysteine, and cysteamine as stabilizers. Investigation of the influence of stabilizing shells on QD fluorescence revealed selective quenching in the presence of Hg²⁺, Cu²⁺, Ag⁺, and Zn²⁺ cations, enabling the development of sensors for multiple metal ions. Detection at concentrations as low as 1 × 10^–5 M was achieved within 5–6 s using a sample volume of only 3 μL. The resulting sensor systems are low-cost, simple to operate, and suitable for rapid, on-site analysis.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"540 - 552"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808220","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 Chlorine in Reference Materials of Marine Sediments of the OOPE and SDO Series by X-ray Fluorescence Spectrometry","authors":"I. V. Khokhlova,&nbsp;V. P. Kolotov,&nbsp;T. G. Kuz’mina,&nbsp;T. V. Romashova,&nbsp;M. A. Troneva","doi":"10.1134/S1061934826700231","DOIUrl":"10.1134/S1061934826700231","url":null,"abstract":"<p>The main problem in determining chlorine in marine sediments is the lack of a sufficient number of reference materials (RMs) with certified values for the content of this element. In the RMs of the earlier SDO series (bottom sediment standards) and the newer OOPE series (pelagic sediment standards), chlorine contents in clays and silts are given only as informative values. A method for the X-ray fluorescence determination of chlorine in RMs of pelagic sedimentary deposits (clays and silts) of the SDO and OOPE series is proposed. The emitters were prepared by pressing the test material—previously thoroughly homogenized and dried at 105°C—with the addition of polystyrene as a binder. Calibration characteristics for chlorine determination were obtained using reference samples, the matrices of which were RM clay and silt samples washed free of chlorine, with calculated portions of NaCl powder added. The results of chlorine determination in the original clay and silt standards agree well with the informative values given in the RM certificates. The uncertainty of chlorine determination by the X-ray fluorescence method in clay and silt RMs within the concentration range of 2–4% is characterized by a standard deviation from 0.08 to 0.23%.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"657 - 663"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808262","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":"Volatile Organic Compounds Forming Unpleasant Odor in Wastewater from Fisheries","authors":"L. I. Sokolova,&nbsp;I. Yu. Khutornaya,&nbsp;A. B. Gatsanyuk,&nbsp;E. V. Lipchenko","doi":"10.1134/S1061934826700188","DOIUrl":"10.1134/S1061934826700188","url":null,"abstract":"<p>A comparison of methods for isolating volatile organic compounds from wastewater is conducted. The most suitable method is steam distillation and selective conversion of volatile carbonyl compounds to 2,4-dinitrophenylhydrazones (<b>2,4-DNPH</b>). Separation and analysis of the volatile fraction are performed using gas chromatography-mass spectrometry (<b>GC–MS</b>), HPLC, and HPLC–MS. Precursors of volatile organic compounds are isolated from a model wastewater system using extraction methods. Higher fatty acids, amino acids, carboxylic acid esters, phenols, and carbonyl compounds are identified using GC–MS and HPLC–MS. Ten carbonyl compounds were identified in wastewater from a fish processing plant using HPLC and HPLC–MS, with a total concentration of 15.9 mg of 2,4-DNPH per kg of fish waste, calculated as acetaldehyde.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"592 - 595"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808204","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":"Assessment of the Simultaneous Determination of Unsymmetrical Dimethylhydrazine and Three Transformation Products in Model Solutions by Gas Chromatography–Mass Spectrometry","authors":"E. V. Zagladkina,&nbsp;M. D. Shachneva,&nbsp;M. V. Beliakov,&nbsp;E. I. Savelieva","doi":"10.1134/S1061934826700140","DOIUrl":"10.1134/S1061934826700140","url":null,"abstract":"<p>Unsymmetrical dimethylhydrazine (UDMH) serves as a component of high-boiling rocket fuel. This highly toxic compound rapidly oxidizes and decomposes in the environment, producing a variety of transformation products. Hygienic standards exist for only a few of these products, specifically dimethylamine (DMA), 1,1,4,4-tetramethyltetrazene (TMT), and <i>N</i>-nitrosodimethylamine (NDMA). Developing a chromatographic–mass spectrometric method for the simultaneous determination of UDMH and its regulated transformation products represents a current analytical challenge. The possibility of simultaneously determining UDMH and three of its transformation products—NDMA, TMT, and DMA—in model solutions was evaluated using gas chromatography–mass spectrometry. Reagents for the derivatization of UDMH and DMA were investigated, followed by the determination of their derivatives, NDMA, and TMT in extracts. The influence of side reaction products on the stability of TMT and on the chromatographic characteristics of the analytes was assessed. A sequential derivatization procedure for UDMH and DMA was developed to enable their determination by gas chromatography–tandem mass spectrometry in a single workflow. Derivatization and extraction conditions were optimized to prevent analyte degradation; the linearity of the analytical signal and reproducibility of the procedure were evaluated, and the stability of solutions in the autosampler was examined.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"553 - 561"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808279","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":"Microfluidic Paper-Based Analytical Devices as Promising Platforms for Resource-Efficient Chemical Analysis: Methods of Fabrication and Signal Detection","authors":"A. A. Furletov,&nbsp;A. V. Yakimenko,&nbsp;V. V. Apyari,&nbsp;S. G. Dmitrienko","doi":"10.1134/S106193482670019X","DOIUrl":"10.1134/S106193482670019X","url":null,"abstract":"<p>Resource efficiency has become a key criterion in evaluating methods of analytical chemistry. Microfluidic paper-based analytical devices generally meet this criterion. This article provides an overview of the main approaches to the development and application of microfluidic paper-based analytical devices as tools for resource-efficient chemical analysis. Fundamental principles of the design of such systems are discussed, including various methods of the formation of hydrophobic barriers on the paper surface and methods for recording the analytical signal (digital colorimetry, fluorescence and electrochemical detection). Potentials for combining these detection methods with paper microfluidic systems in the development of rapid, portable, and inexpensive screening assays are demonstrated.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"596 - 613"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808280","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}