Journal of Analytical Chemistry最新文献

{"title":"Comparison of Soil Sample Preparation Methods in Determining Mobile Element Species by Inductively Coupled Plasma Optical Emission Spectrometry","authors":"S. S. Savinov,&nbsp;R. D. Tleuzhanova","doi":"10.1134/S1061934825701680","DOIUrl":"10.1134/S1061934825701680","url":null,"abstract":"<p>Soil serves as a linking component in ecosystems; because of its high sorption capacity, it retains various elements, regulates their transfer into natural waters, and controls their availability in the nutrient medium of plants. Determination of the content of mobile element species in soil relies on their extraction with an ammonium acetate buffer solution, which presents one of the most widely used extractants, followed by an analysis of the resulting extract. Experimental results demonstrate that matrix effects during the application of the ICP OES method can manifest themselves differently for different soil samples. Analysts can eliminate these effects by the fivefold dilution of the extract; however, some samples require higher dilution factors. The known certified procedures for determining mobile species describe various approaches to obtaining ammonium acetate extracts. Experimental data demonstrate the influence of analyte extraction schemes differing in the time of interaction between the soil aliquot and the extracting solution, mixing method, and the number of extraction stages. On average, after 24-h equilibration, twice as much of the mobile element species is extracted as after 1-h agitation of the suspension on a shaker. In addition, the extraction efficiency depends both on the nature of the specific analyte and on the soil under investigation.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"424 - 431"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636911","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 Pregabalin in Bulk and Capsule Samples Using Diazotization and Azo Coupling Reactions and Ultraviolet-Visible Spectrophotometry","authors":"Niralee J. Malviya,&nbsp;Mohammed Alqarni,&nbsp;Abdullah A. Alshehri,&nbsp;Hardik L. Varu,&nbsp;Mrunal A. Ambasana","doi":"10.1134/S1061934825701746","DOIUrl":"10.1134/S1061934825701746","url":null,"abstract":"<p>The current study presents the development and validation of a ultraviolet-visible (<b>UV-Vis</b>) spectroscopic method for the quantification of pregabalin in its bulk and marketed formulations. To perform this study, pregabalin was first derivatized by conducting a conventional diazotization procedure and then coupled with β-naphthol at 2–5°C. The formed adduct showed its highest absorption maximum at 355 nm within the range of 200–800 nm on the UV-Vis spectrum. Further, the developed method was validated as per International Council for Harmonization guidelines. The method was linear over the concentration range of 0.06 to 0.24 µg/mL (<i>r</i>² = 0.9971), with limits of detection (0.001 µg/mL) and quantitation (0.003 µg/mL). Intra-day (mean recovery of 99.5%) and inter-day (mean recovery of 99.9%) precision were determined. The mean recovery in the accuracy study was between 99.7–100.4%. The method showed superiority over all the previously reported methods, featuring a rapid reaction, simplistic synthesis, shorter analysis time, and high sensitivity. Additionally, the method proved successful when applied to the quantification of marketed products.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"501 - 512"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636913","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":"Solid-Phase Extraction and Spectrophotometric Determination of Tetracycline","authors":"D. E. Kuznetsova,&nbsp;N. V. Saranchina,&nbsp;D. A. Yalandaeva,&nbsp;P. D. Matveyuk,&nbsp;N. A. Gavrilenko","doi":"10.1134/S1061934825701655","DOIUrl":"10.1134/S1061934825701655","url":null,"abstract":"<p>A polymethacrylate matrix (<b>PMM</b>) is proposed for the solid-phase extraction and determination of tetracycline in water and human urine. A study of the effects of medium acidity, temperature, and contact time on tetracycline extraction by PMM demonstrates that tetracycline is extracted by the matrix as the singly charged anion H₂TC⁻ in the pH range 8.9–9.7, with partition coefficients reaching (5–6) × 10³ mL/g. The sensitivity of the solid-phase spectrophotometric determination of tetracycline after its extraction with PMM is increased by heating analyte solutions to 60–70°C at a contact time of 60–120 min. A procedure for the solid-phase spectrophotometric determination of tetracycline with a limit of detection of 0.03 mg/L after extraction of tetracycline for 90 min is developed. Using the instrumentally measured peak area of the anionic form of tetracycline H₂TC⁻ in the matrix at the absorption maximum 385 nm as an analytical signal reduces the limit of detection to 0.01 mg/L. The procedure was tested in the analysis of river and bottled water samples and human urine.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"400 - 406"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636941","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":"Fluorine Determination in Powder Samples of Various Matrices by the CaF Molecular Band Using Multidimensional Calibration","authors":"E. V. Shabanova,&nbsp;I. E. Vasil’eva","doi":"10.1134/S1061934825701709","DOIUrl":"10.1134/S1061934825701709","url":null,"abstract":"<p>Determination of the fluorine content of natural samples is of interest from the geochemical and ecological prospects. Direct methods for the determination of fluorine, such as atomic emission spectrometry, are more preferable for the routine analysis of powder samples than methods including chemical sample preparation. The previously proposed method for determining fluorine by the first edge of the CaF molecular band (529.1 nm) with unidimensional calibration by certified reference materials adequate to the test samples in the composition and genesis for the reduction of matrix and spectral effects on the analyte was improved using n-dimensional calibration. To obtain reliable results in the range from 0.0040 to 65 wt % fluorine using spectral equipment with photoelectric spectrum recording and medium resolution, and substance introduction into an arc discharge by the spillage–injection method, we studied versions of multidimensional calibration by certified reference materials of varied compositions. The MLR calibration, constructed using certified reference materials of various compositions and macro- and microelement profiles, was found to be robust to variations in the chemical and mineral composition of powder samples. New data on the fluorine content of certified reference materials of the composition of rock and ash are presented.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"452 - 464"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636912","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":"Nanozyme-Amplified Electrochemical Immunosensors for Foodborne Pathogen Detection","authors":"Yifan He,&nbsp;Yanfei Lv,&nbsp;Li Fu,&nbsp;Shichao Zhao","doi":"10.1134/S1061934825701734","DOIUrl":"10.1134/S1061934825701734","url":null,"abstract":"<p>The global burden of foodborne diseases necessitates the development of rapid, sensitive, and field-deployable detection technologies to ensure food safety. Conventional methods for pathogen detection, such as cell culture, polymerase chain reaction, and enzyme-linked immunosorbent assay, are often limited by long analysis times, complex instrumentation, and the inherent instability of biological reagents. Electrochemical immunosensors have emerged as a powerful alternative, offering high sensitivity, low cost, and portability. A significant leap forward in this field has been the integration of nanozymes nanomaterials with intrinsic enzyme-mimicking catalytic activities—as robust signal amplification agents. This review provides a comprehensive and critical analysis of recent advances in nanozyme-amplified electrochemical immunosensors for the detection of major foodborne pathogens. The discussion begins by outlining the architectural principles of these sensors, including the classification and catalytic properties of various nanozymes such as those based on metal oxides, noble metals, carbon nanomaterials, and metal-organic frameworks. A central focus is placed on elucidating the catalytic mechanisms of peroxidase-mimicking nanozymes, which are pivotal for signal generation. The review then systematically surveys state-of-the-art applications for the detection of key pathogens, including <i>Salmonella</i> spp., <i>Escherichia coli</i> O157:H7, <i>Listeria monocytogenes</i>, and <i>Staphylococcus aureus</i>, critically evaluating their analytical performance in complex food matrices. Finally, this review addresses the persistent challenges facing the field, such as mitigating matrix effects, ensuring long-term stability, and overcoming hurdles to commercialization. A forward-looking perspective is provided, highlighting next-generation developments, including the rational design of single-atom nanozymes, integration with microfluidic systems for automation, and the potential for multiplexed detection, which collectively promise to revolutionize food safety monitoring.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"482 - 500"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636944","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 Fluoroquinolones and Tetracyclines in Natural Waters by Capillary Electrophoresis with UV Detection in Combination with Preliminary Solid-Phase Microextraction with Polydopamine-Coated Fe3O4 Nanoparticles","authors":"D. A. Karpitskiy,&nbsp;E. A. Bessonova,&nbsp;A. Yu. Shishov,&nbsp;L. A. Kartsova","doi":"10.1134/S1061934825701710","DOIUrl":"10.1134/S1061934825701710","url":null,"abstract":"<p>Antibiotics are widely used in human and veterinary medicine; therefore, the development of approaches to their monitoring in natural environments is of considerable current importance. The potential of using magnetic nanoparticles with a polydopamine coating for the sorption of fluoroquinolones and tetracyclines from aqueous media has been demonstrated. Procedures for off-line preconcentration and combined on-line preconcentration of analytes using capillary zone electrophoresis with UV detection were proposed. Metrological characteristics were determined and the procedures were tested on real-world samples.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"465 - 473"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636897","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":"XIII All-Russia Conference on Environmental Analysis “EcoAnalytica-2025:” Preface to the Special Issue","authors":"A. V. Bulatov","doi":"10.1134/S106193482570162X","DOIUrl":"10.1134/S106193482570162X","url":null,"abstract":"","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"377 - 377"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636914","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":"Enhancing the Environmental Sustainability of the Synthesis of Molecularly Imprinted Polymers Specific to Mycotoxins","authors":"I. E. Menyailo,&nbsp;M. V. Pozharov,&nbsp;S. A. Pidenko,&nbsp;N. A. Burmistrova","doi":"10.1134/S1061934825701631","DOIUrl":"10.1134/S1061934825701631","url":null,"abstract":"<p>A method is developed for the synthesis of a molecularly imprinted adsorbent specific to zearalenone (ZEA) based on silicon(IV) oxide nanoparticles modified with (3-aminopropyl)triethoxysilane (APTES). The study demonstrates that the selection of a template based on preliminary quantum-chemical calculations of the interaction energy between APTES and various template molecules can reduce environmental impact during the adsorbent synthesis. For imprinting APTES, the researchers used ZEA and its dummy analogs (warfarin, coumarin, 4-hydroxycoumarin, and quercetin) as templates in the presence of a cationic surfactant, cetyltrimethylammonium bromide. The results showed that warfarin (adsorption capacity <i>Q</i> = 1.63 mg/g, imprinting factor IF = 14.9) and 4-hydroxycoumarin (<i>Q</i> = 1.1 mg/g, IF = 6.0) served as the optimal dummy templates, in good agreement with the results of quantum-chemical modeling. The imprinted adsorbent was successfully applied to the extraction of ZEA from wheat extracts (<i>Q</i> = 1.25 mg/g). Replacing warfarin (LD₅₀ = 3 mg/kg) with the less toxic 4-hydroxycoumarin (LD₅₀ = 2000 mg/kg) during the synthesis of a ZEA-specific imprinted adsorbent increases its environmental compatibility with only a minor decrease in adsorption efficiency.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"378 - 385"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636939","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":"Sorption–Luminescence Determination of Cefotaxime Using Aminated Silica","authors":"S. L. Didukh-Shadrina,&nbsp;A. A. Timofeeva,&nbsp;V. N. Losev","doi":"10.1134/S1061934825701667","DOIUrl":"10.1134/S1061934825701667","url":null,"abstract":"<p>Silica modified with polyamines, polyhexamethylene guanidine (<b>SiO</b>_<b>2</b><b>-PHMG</b>) and polydimethyldiallylammonium (<b>SiO</b>_<b>2</b><b>-PDDA</b>) is proposed for the sorption preconcentration of antibiotic cefotaxime from aqueous solutions. The maximum recovery (91–93%) of cefotaxime is achieved at pH 3.9–4.3, with a sorption equilibrium time of 10 min. The sorption capacity of the sorbents for cefotaxime, determined from horizontal sections of sorption isotherms, is ∼74 μmol/g, and the distribution coefficient is 1 × 10³ cm³/g. Under dynamic concentration conditions, the recovery of cefotaxime is 99%. Cefotaxime exhibits yellow-green luminescence on the surface of sorbents when irradiated with UV light. The luminescence spectrum is a broad band with a maximum at 470 nm. The maximum luminescence intensity of cefotaxime is observed under the conditions of its quantitative extraction. A procedure is developed for the sorption–luminescence determination of cefotaxime with a limit of detection of 0.13 mg/L for the SiO₂-PDDA sorbent and 0.25 mg/L for the SiO₂-PHMG sorbent. The linearity of the calibration curve is maintained over the ranges 0.5–25 mg/L and 1–50 mg/L using SiO₂-PDDA and SiO₂-PHMG, respectively. The relative standard deviation does not exceed 0.09. The procedure is tested for the determination of cefotaxime in a pharmaceutical preparation and in a model solution.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"407 - 412"},"PeriodicalIF":1.1,"publicationDate":"2026-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636942","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":"Achromatic Magnetic Omega-Filter with an Internal Mass Selection","authors":"M. I. Yavor","doi":"10.1134/S1061934826700103","DOIUrl":"10.1134/S1061934826700103","url":null,"abstract":"<p>A new configuration is proposed for a magnetic Omega-filter with achromatic beam transport and the possibility of ion mass separation at an aperture slit in the middle of the filter. Dipole sector magnets with 160-deg deflection angles, together with electrostatic multipoles at the entrance and exit of the filter, are used in the Omega-filter to form the ion beam and correct angular aberrations. With ions pre-cooled in a radiofrequency quadrupole, a mass resolving power exceeding 2000 can be achieved at full transmission of the phase volume of the ion beam.</p>","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 14","pages":"2237 - 2241"},"PeriodicalIF":1.1,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147626276","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}