Journal of Analytical Chemistry最新文献

{"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}

{"title":"Extraction and Determination of Histidine, Methionine, Proline in Aqueous Solutions and Pharmaceutical Preparations Using N-Vinylcaprolactam Copolymers","authors":"N. Ya. Mokshina,&nbsp;O. A. Pakhomova,&nbsp;P. V. Ivanchura","doi":"10.1134/S1061934826700358","DOIUrl":"10.1134/S1061934826700358","url":null,"abstract":"<p>New extraction systems based on N-vinylcaprolactam are proposed for the extraction of histidine, methionine, and proline for their determination in aqueous media and pharmaceutical preparations. The influence of the phase volume ratio, the nature of the salting-out agent and the composition of N-vinylcaprolactam–N-vinylimidazole and N-vinylcaprolactam–N-vinylformamide copolymers on the quantitative characteristics of amino acid extraction is studied. The regularities of interphase distribution of analytes in water-salt extraction systems with different contents of N-vinylcaprolactam units in copolymers are established. Distribution coefficients and degrees of recovery of amino acids in systems with N-vinylcaprolactam–N-vinylimidazole and N-vinylcaprolactam–N-vinylformamide copolymers in the presence of ammonium sulfate salting-out agent are presented. Copolymers based on N-vinylcaprolactam are used for the efficient extraction of amino acids from pharmaceutical preparations from various manufacturers. Determination of histidine, methionine and proline in the aqueous-salt phase after extraction was performed by a spectrophotometric method based on the intrinsic light absorption of amino acids in the UV region of the spectrum. The developed procedure for the extraction-spectrophotometric determination of amino acids in aqueous media and pharmaceutical preparations, including the extraction of target components from tablet forms using N-vinylcaprolactam copolymers, can be recommended for assessing the quality of pharmaceutical products.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"797 - 802"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061182","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":"Arsenic Speciation Analysis of Waters","authors":"Z. A. Temerdashev,&nbsp;P. G. Abakumov,&nbsp;A. G. Abakumov,&nbsp;M. A. Bolshov","doi":"10.1134/S1061934826700292","DOIUrl":"10.1134/S1061934826700292","url":null,"abstract":"<div><p>The review examines the methods for determining the main forms of arsenic in various waters. The main attention was paid to the determination of inorganic forms of As(III) and As(V) using hybrid methods, that combines the separation and spectroscopic determination of analytes. The possibilities and limitations of using liquid and solid-phase extraction methods to prepare water samples for analysis with preservation of analyte speciation, as well as electrophoretic methods, various options for chromatographic separation, and hydride generation method are considered. It has been shown that research on this issue should be developed in the direction of improving sample preparation in order to obtain more selective, environmentally friendly, simple, and highly productive methods for analyzing natural waters to ensure the determination of arsenic species in a wide range of concentrations. Considerable attention is paid to the combination of separation and final determination of the analyte by inductively coupled plasma mass spectrometry since this combination provides the highest sensitivity for the determination of various forms of arsenic.</p></div>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"744 - 755"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061183","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":"Field-Flow Fractionation of Nano- and Microparticles in a Rotating Coiled Column","authors":"P. S. Fedotov,&nbsp;O. N. Katasonova,&nbsp;M. S. Ermolin,&nbsp;A. I. Ivaneev","doi":"10.1134/S1061934826700280","DOIUrl":"10.1134/S1061934826700280","url":null,"abstract":"<p>Theoretical aspects, fields, and examples of application of the method of field-flow fractionation of nano- and microparticles in a rotating coiled column (<b>RCC</b>) proposed at the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences are considered. Particular attention is paid to the use of this method in the study of environmental samples—soil, volcanic ash, and urban dust. Possibilities of method application to the fractionation and purification of functional materials, including chromatographic sorbents, are described. A possibility of scaling up the particle separation process in a RCC is demonstrated. Prospects for using this method in the fabrication of standard samples of natural nanoparticles are assessed.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"731 - 743"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061221","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":"Fabrication of Hybrid Monoliths Integrating a Metal–Organic Framework for Online Enrichment and Determination of Vitexicarpin in Vitex trifolia","authors":"Ping Liu,&nbsp;Shuo Yuan,&nbsp;Haiyan Liu","doi":"10.1134/S1061934826700371","DOIUrl":"10.1134/S1061934826700371","url":null,"abstract":"<p>In this study, the metal−organic framework (<b>MOF</b>) material MOF-801 was synthesized and further derivatized to introduce C=C double bonds on its surface. Then, a MOF-801/polymer monolithic column was prepared using derivatized MOF-801, lauryl methacrylate and methacrylic acid as comonomers, ethylene glycol dimethacrylate as a cross-linker, <i>n</i>-hexanol as a porogen, and azobisisobutyronitrile as an initiator. After being characterized, the monolithic material was employed as a solid-phase extraction adsorbent to perform online enrichment and purification of vitexicarpin in <i>Vitex trifolia</i>, which was coupled with high-performance liquid chromatography. The enrichment factor reached up to 212.5. Under this condition, the content of vitexicarpin in the eluate was 60.63%, which was much higher than that in <i>Vitex trifolia</i> (0.03%). This method demonstrated excellent linearity within the range of 0.13 µg/mL to 5 × 10² µg/mL with a calibration equation of <i>y</i> = 0.63135<i>x</i> + 0.70981, and the correlation coefficient was 0.9992. The inter-day and intra-day precision was less than 1.63%. The recovery rate of vitexicarpin in <i>Vitex trifolia</i> was between 95 and 105%.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"880 - 889"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061181","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":"Research Work and Legacy of B.Ya. Spivakov, Corresponding Member of the Russian Academy of Sciences","authors":"T. A. Maryutina,&nbsp;V. M. Shkinev,&nbsp;Yu. A. Zolotov","doi":"10.1134/S1061934826700267","DOIUrl":"10.1134/S1061934826700267","url":null,"abstract":"<p>Professor Boris Yakovlevich Spivakov (May 19, 1941—April 08, 2022), Doctor of Chemical Sciences and Corresponding Member of the Russian Academy of Sciences, was a prominent scientist in analytical chemistry who made a substantial contribution to the development of liquid extraction theory and to the expansion of its applications. He led a series of studies on the extraction of water-soluble metal complexes in aqueous two-phase systems based on water-soluble polymers. At the Laboratory of Preconcentration Methods at the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences, which he directed from 1990 to 2016, researchers actively advanced both the theory and practical applications of membrane filtration, solid-phase extraction, and liquid chromatography with a free stationary phase. Spivakov also proposed a comprehensive set of methods for the fractionation, investigation, and analysis of nano- and microparticles of natural and anthropogenic origin. He authored more than 300 scientific papers, inventions, and monographs. In 1986, he received the L.A. Chugaev Prize of the USSR Academy of Sciences for a series of works on complex formation in extraction, and in 2004, he received the V.G. Khlopin Prize of the Russian Academy of Sciences for developing new methods for the separation and concentration of substances to address analytical, preparative, and technological problems in radiochemistry. This article presents bibliographic information and an overview of the diverse scientific contributions of B.Ya. Spivakov.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"709 - 717"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061206","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":"Physical Fields in Methods of Liquid Sample Preparation","authors":"T. A. Maryutina,&nbsp;V. M. Shkinev,&nbsp;E. Yu. Savonina,&nbsp;O. N. Katasonova,&nbsp;R. Kh. Dzhenloda,&nbsp;O. B. Mokhodoeva,&nbsp;V. V. Maksimova,&nbsp;Yu. N. Romanova,&nbsp;N. S. Musina","doi":"10.1134/S1061934826700279","DOIUrl":"10.1134/S1061934826700279","url":null,"abstract":"<p>The article describes the results of studies performed in the Laboratory of Preconcentration Methods of the Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences using physical fields (ultrasonic, magnetic, and centrifugal) at the step of sample preparation for the intensification of the processes of the extraction and sorption preconcentration of various substances. Most directions of this work were proposed and developed under the supervision of B.Ya. Spivakov, Corresponding Member of the Russian Academy of Sciences. The specific features of the implementation of multistep extraction processes in a rotating coiled column are considered and the results of their applications to the preconcentration and separation of elements are presented. The specific features of sorption separation in ultrasonic suspension columns and possibilities of their use in the analysis of environmental samples, pharmaceuticals, and process solutions are described. Data on the synthesis and application of modified magnetic nanoparticles in the methods of the separation and preconcentration of various substances, also in the dynamic mode are presented. Examples of the separation of water-in-oil emulsions into fractions as a result of their magnetic or ultrasonic treatment are presented. The effect of the ultrasonic treatment of oil samples on the intensification of their oxidative desulfurization process is shown.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"718 - 730"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061208","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":"Full Evaporation Headspace Single-Drop Microextraction Combined with Air-Agitated Liquid–Liquid Microextraction Based on the Solidification of a Floating Organic Droplet Followed by Gas Chromatography for the Determination of Chlorobenzenes","authors":"Mohammad Saraji,&nbsp;Maliheh Shayan,&nbsp;Salman Javadian","doi":"10.1134/S1061934825601987","DOIUrl":"10.1134/S1061934825601987","url":null,"abstract":"<p>Full evaporation headspace single-drop microextraction (<b>FE-HS-SDME</b>) in combination with air-agitated liquid−liquid microextraction based on the solidification of a floating organic droplet (<b>AALLME-SFO</b>) was developed as an effective preconcentration technique. Chlorobenzenes were used as model analytes to evaluate the performance of the method. In the AALLME-SFO step, cyclohexane was used as the extraction solvent. Moreover, hexadecane was used for extracting analytes in the FE-HS-SDME step. The analytes were extracted from water samples and then quantified by gas chromatography coupled with electron-capture detection. Experimental factors influencing FE-HS-SDME and AALLME-SFO were evaluated. Based on the findings, limits of detection in the range of 0.003–0.006 µg/L were obtained. The technique showed good precision with a relative standard deviation of less than 7%. Excellent linearity (R² &gt; 0.9993) was achieved between 0.01 and 3.00 µg/L. The method demonstrated high sensitivity with acceptable recoveries between 80 and 100% for the extraction of analytes from wastewater samples.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"803 - 810"},"PeriodicalIF":1.1,"publicationDate":"2026-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061205","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":"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}