Journal of Analytical Chemistry最新文献

Fluorimetric Fingerprinting with Magnetite–Particle–Fluorophore Sandwich Systems for Dairy Authentication and Adulteration Detection 磁铁矿-颗粒-荧光团夹心系统的荧光指纹识别技术用于乳制品认证和掺假检测

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700802

E. V. Skorobogatov, E. M. Polyakova, I. A. Solovova, T. A. Podrugina, M. K. Beklemishev

{"title":"Fluorimetric Fingerprinting with Magnetite–Particle–Fluorophore Sandwich Systems for Dairy Authentication and Adulteration Detection","authors":"E. V. Skorobogatov, E. M. Polyakova, I. A. Solovova, T. A. Podrugina, M. K. Beklemishev","doi":"10.1134/S1061934826700802","DOIUrl":"10.1134/S1061934826700802","url":null,"abstract":"A fluorimetric fingerprinting method was developed for distinguishing dairy product samples according to their manufacturer and for detecting adulteration. The approach is based on the use of magnetite–particle–fluorophore sandwich systems formed through the interaction of polyhexamethylene guanidine-modified magnetite particles with milk components, followed by the addition of a fluorophore (carbocyanine dyes or carbon dots). The resulting sandwich systems were separated from excess fluorophore using a magnet, and the fluorescence of the aggregates was recorded photographically. The photographs were then digitized, and the resulting data were processed using chemometric methods. For comparison, the proposed method was evaluated against two alternative approaches: one based on the intrinsic fluorescence of the samples and the other based on the fluorescence of fluorophore-supplemented samples without magnetic separation. The proposed approach enables highly accurate detection of dairy product adulteration using common adulterants (100% accuracy) and discrimination of samples according to their manufacturer (93%).","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1515 - 1524"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149022985","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}

引用次数: 0

Cleanup of Soil Extracts With Various Sorbents Using the QuEChERS Technique for Gas Chromatography–Mass Spectrometry Determination of PAHs 不同吸附剂净化土壤提取物的QuEChERS技术用于气相色谱-质谱法测定多环芳烃

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700772

Z. A. Temerdashev, S. K. Ovsepyan, M. S. Ivaschenko, I. G. Korpakova

{"title":"Cleanup of Soil Extracts With Various Sorbents Using the QuEChERS Technique for Gas Chromatography–Mass Spectrometry Determination of PAHs","authors":"Z. A. Temerdashev, S. K. Ovsepyan, M. S. Ivaschenko, I. G. Korpakova","doi":"10.1134/S1061934826700772","DOIUrl":"10.1134/S1061934826700772","url":null,"abstract":"This study examines the preparation of different soil types for polycyclic aromatic hydrocarbon (PAH) analysis, including preliminary extract purification by dispersive solid-phase extraction (dSPE) using the QuEChERS approach with various sorbents. We investigated the influence of soil matrix components and assessed the ability of different sorbents to minimize matrix effects during sample preparation. The study evaluated the performance of silica gel functionalized with N-propylethylenediamine groups (PSA), a mixture of PSA, octadecyl (C18)-bonded silica gel, and magnesium sulfate (PSA–C18–MgSO4), magnesium silicate-based Florisil, and aluminum oxide for the purification of soil extracts before gas chromatography–mass spectrometry (GC–MS) determination of PAHs. The proposed analytical procedure was used using soils with different organic matter contents. Recoveries exceeded 75% for PAHs extracted from high-humus soils and 90% for those extracted from low-humus soils. The GC–MS limits of quantification for 19 PAHs after purification of extracts from high-humus soils with Florisil or the PSA–C18–MgSO4 mixture were 5–10 μg/kg.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1479 - 1488"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023018","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}

引用次数: 0

Rapid Determination of Boron in Aluminum-Boron-Tungsten Composite Shielding Materials Using Stepwise Dissolution and Inductively Coupled Plasma Optical Emission Spectrometry 逐步溶解电感耦合等离子体发射光谱法快速测定铝硼钨复合屏蔽材料中的硼

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700851

Caixia Chen, Xueyi He, Baocheng Li, Miao Yu

{"title":"Rapid Determination of Boron in Aluminum-Boron-Tungsten Composite Shielding Materials Using Stepwise Dissolution and Inductively Coupled Plasma Optical Emission Spectrometry","authors":"Caixia Chen, Xueyi He, Baocheng Li, Miao Yu","doi":"10.1134/S1061934826700851","DOIUrl":"10.1134/S1061934826700851","url":null,"abstract":"The aluminum-boron-tungsten composite is an advanced shielding material composed of an aluminum matrix incorporating borides and tungsten. Boron content is critical for determining the material’s neutron, gamma-ray, and electromagnetic shielding performance, which underscores the need for its accurate quantification. In this work, a stepwise dissolution procedure combined with inductively coupled plasma optical emission spectrometry was developed for the first time to enable rapid and precise determination of boron in aluminum-boron-tungsten composites. To address incomplete digestion and spectral interference, a sequential digestion protocol was employed, involving acid dissolution, high-temperature ashing, alkali fusion, and a final acid dissolution step. Critical parameters—including flux type, fusion temperature, and duration—were systematically optimized to achieve complete decomposition of the sample. Spectral and matrix interferences were minimized through matrix-matching, sample dilution, radial observation mode, and selection of the sensitive boron emission line at 249.772 nm. Method validation confirmed a linear calibration curve with a correlation coefficient of 0.9996. The limits of detection and quantification were 0.00017 and 0.00057%, respectively. Spike recovery tests yielded 98.8–103.3%, with relative standard deviations of 1.8–3.1%. Furthermore, F-tests and t-tests indicated no statistically significant difference between the proposed method and the standard method (JB/T 7993-2012). The developed procedure exhibits high sensitivity, excellent accuracy, and operational simplicity, thereby offering a robust analytical approach to support research, quality control, and performance optimization of aluminum-boron-tungsten composite shielding materials.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1628 - 1635"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023016","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}

引用次数: 0

Optimized Enantioselective Derivatization of Amino Acids with Marfey’s Reagent for Reversed-Phase UHPLC–HRMS Determination 反相UHPLC-HRMS法测定氨基酸对映选择衍生的Marfey试剂优化

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700838

A. Z. Temerdashev, O. O. Dyadyura, E. M. Gashimova, M. O. Steshin, D. V. Perunov, V. A. Porkhanov, I. S. Polyakov

引用次数: 0

New Microfluidic Device for Naked-Eye Colorimetric Detection of Silver in Dental Fillings 新型微流控裸眼比色法检测口腔填充物中银

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934825603408

Khawlah S. Burghal, Astabraq H. Zaalan, Yasir N. Al-Mohammad, Hanan A. Al‑Hazam, Hassan T. Abdulsahib

{"title":"New Microfluidic Device for Naked-Eye Colorimetric Detection of Silver in Dental Fillings","authors":"Khawlah S. Burghal, Astabraq H. Zaalan, Yasir N. Al-Mohammad, Hanan A. Al‑Hazam, Hassan T. Abdulsahib","doi":"10.1134/S1061934825603408","DOIUrl":"10.1134/S1061934825603408","url":null,"abstract":"A novel chalcone-based ligand, potassium (E)-(4-(3-(2,4 dihydroxyphenyl)acryloyl)phenyl)carbamodithioate (DHPAC), has been developed as an efficient chelating agent for the spectrophotometric determination of silver ions. It formed a yellow complex with silver ions at 500 nm. The silver ions were chelated with the chalcone reagent (DHPAC) in an acidic medium at pH 6 using Britton–Robinson buffer. Stoichiometric studies using Job’s method and molar-ratio analysis confirmed a 1 : 1 metal-to-ligand stoichiometry. Beer’s law was applied in the range of 0.2–5.0 μg/mL, with a molar absorbance of 3.40 × 104 L/(mol cm), a sensitivity of 0.0023 μg/cm2, a correlation coefficient of 0.9924, and a limit of detection of 0.034 μg/mL. The accuracy ranged from 98.6 to 103.9%, while the relative standard deviation was less than 1.5%. A colorimetric method with a portable microphotometer chip and smartphone imaging was employed to measure silver concentrations. Image analysis with ImageJ software enabled quantification of silver content from color intensity. A comparative evaluation with the conventional spectrophotometric method showed good agreement under identical conditions. Owing to its simplicity, portability, low fabrication cost, and strong analytical performance, the smartphone-based method is particularly promising for rapid, on-site detection of silver in dental filling materials.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1613 - 1627"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023015","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}

引用次数: 0

Single Particle Inductively Coupled Plasma Mass Spectrometry for Solving Geochemical and Environmental Problems 单粒子电感耦合等离子体质谱法用于解决地球化学和环境问题

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700759

M. S. Ermolin, P. S. Fedotov

引用次数: 0

Derivatization and Determination of Unsymmetrical Dimethylhydrazine in Solid Natural and Industrial Matrices by HPLC-MS/MS 天然和工业固体基质中不对称二甲基肼的衍生化及HPLC-MS/MS测定

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S106193482670084X

M. V. Beliakov, E. V. Zagladkina, M. D. Shachneva, E. I. Savelieva

{"title":"Derivatization and Determination of Unsymmetrical Dimethylhydrazine in Solid Natural and Industrial Matrices by HPLC-MS/MS","authors":"M. V. Beliakov, E. V. Zagladkina, M. D. Shachneva, E. I. Savelieva","doi":"10.1134/S106193482670084X","DOIUrl":"10.1134/S106193482670084X","url":null,"abstract":"1,1-Dimethylhydrazine (UDMH) is subject to ongoing environmental monitoring as a highly toxic pollutant in areas and facilities associated with its production, storage, and use as a rocket fuel component. The development of procedures for determining UDMH in various samples, including chromatography-mass spectrometry, is complicated by its instability and reactivity, including during sample preparation and analysis, making most existing procedures for determining UDMH and its derivatives non-reproducible. This study assesses the possibility of UDMH determination using high-performance liquid chromatography-mass spectrometry in samples of various soils and industrial construction materials. Comparative studies are conducted on the selection of reagents and conditions for UDMH derivatization and extraction from various types of solid matrices. The interfering effect of parallel reactions during matrix introduction and extraction on UDMH stability is established. The stability of UDMH derivatives in extracts is established, allowing for further validation of the developed UDMH determination procedure.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1551 - 1560"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023105","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}

引用次数: 0

Predicting Drugs in Synthetic Oral Fluid Using Handheld Surface-Enhanced Raman Spectroscopy and Multivariate Regression Algorithms 使用手持式表面增强拉曼光谱和多元回归算法预测合成口服液中的药物

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826700863

Sulaf Assi, Megan Wilson, Molly Thompson, Ismail Abbas, Jason Birkett, Duncan Carmichael, Dhiya Al-Jumeily OBE

{"title":"Predicting Drugs in Synthetic Oral Fluid Using Handheld Surface-Enhanced Raman Spectroscopy and Multivariate Regression Algorithms","authors":"Sulaf Assi, Megan Wilson, Molly Thompson, Ismail Abbas, Jason Birkett, Duncan Carmichael,  Dhiya Al-Jumeily OBE","doi":"10.1134/S1061934826700863","DOIUrl":"10.1134/S1061934826700863","url":null,"abstract":"Drug detection in oral fluid is important for many applications such as roadside drug testing. Oral fluid in such cases serves as a non-invasive matrix that does not require a specialist for sample collection. Handheld Raman spectroscopy offers a chemically specific and rapid technique for detecting drugs on the spot. However, this technique lacks sensitivity when applied to detecting drugs in biological matrices. Surface-enhanced Raman spectroscopy (SERS) addresses this limitation by enhancing the Raman signal of drugs upon conjugating the drug of interest with metallic nanoparticles. In this work, handheld SERS was combined with multivariate regression for detecting paracetamol, cocaine, and benzoylecgonine in synthetic oral fluid. Solutions were prepared across the studied concentration range down to 0.01 mg/mL, which was the lowest level that yielded identifiable SERS bands. For surface enhanced Raman spectroscopy enhancement, gold and silver substrates were used. Spectra were collected using the Agilent Resolve handheld Raman spectrometer equipped with 830 nm laser wavelength. The spectral data were exported to MATLAB, where principal component regression (PCR) and partial least squares regression (PLSR) were applied. The results showed that optimal SERS enhancement was obtained using a gold substrate for paracetamol and benzoylecgonine and a silver substrate for cocaine. In all cases, both PCR and PLSR models demonstrated high accuracy and precision in predicting the concentration of drugs in synthetic oral fluid, with PLSR outperforming PCR. In summary, handheld SERS predicted the concentrations of the three drugs in synthetic oral fluid non-destructively.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1636 - 1646"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023043","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}

引用次数: 0

Physical Process Involved in the Recognition of Ions via Optical Chemosensors: A Concise Report 通过光学化学传感器识别离子的物理过程：简要报告

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934825604116

Danish Khan, Nirma Maurya, Shaily, Shweta Bisht, Nishant Singh, Pragati Kushwaha

{"title":"Physical Process Involved in the Recognition of Ions via Optical Chemosensors: A Concise Report","authors":"Danish Khan, Nirma Maurya,  Shaily, Shweta Bisht, Nishant Singh, Pragati Kushwaha","doi":"10.1134/S1061934825604116","DOIUrl":"10.1134/S1061934825604116","url":null,"abstract":"Optical chemosensors for ion detection are at the forefront of analytical innovation, integrating cutting-edge optical methodologies with sophisticated chemical principles to achieve unmatched precision and real-time monitoring. This study delves into the intricate mechanisms of ion detection through optical chemosensors, which exploit specific molecular interactions to generate detectable optical changes. These sensors are distinguished by their exceptional sensitivity and selectivity, employing advanced techniques such as absorption and fluorescence spectroscopy. Absorption-based sensors rely on colorimetric shifts, while fluorescence-based sensors detect variations in light emission. The review systematically categorizes optical chemosensors according to their operating mechanisms, including charge transfer, photoinduced electron transfer, and intramolecular charge transfer. By examining recent advancements and addressing current challenges, this review provides a comprehensive perspective on the transformative potential of optical chemosensors for ion detection in chemical, biological, and environmental fields.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1561 - 1579"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023040","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}

引用次数: 0

A New Naphthalimide Schiff Base as a Fluorogenic Probe for Ultrasensitive and Selective Detection of Copper(II) in Real Water Samples 一种新型萘酰亚胺希夫碱荧光探针用于实际水样中铜（II）的超灵敏选择性检测

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-09-24 DOI: 10.1134/S1061934826600228

Bingtao Lin, Deming Du, Yanxi Song, Jiahe Sun, Hongqi Li

{"title":"A New Naphthalimide Schiff Base as a Fluorogenic Probe for Ultrasensitive and Selective Detection of Copper(II) in Real Water Samples","authors":"Bingtao Lin, Deming Du, Yanxi Song, Jiahe Sun, Hongqi Li","doi":"10.1134/S1061934826600228","DOIUrl":"10.1134/S1061934826600228","url":null,"abstract":"Cu2+ plays a crucial role in life science, the ecological environment, and the medical field. The development of fluorescent probes capable of detecting Cu2+ with high sensitivity is of significant importance for the early and accurate diagnosis of diseases. In this work, a novel naphthalimide-derived Schiff base was synthesized, which serves as a fluorescent probe for the sensitive and rapid detection of Cu2+ in complex environments. Upon binding with Cu2+, the probe exhibits a blue shift in its maximum emission wavelength from 561 to 533 nm, accompanied by a significant decrease in fluorescence intensity. The probe demonstrates a low detection limit of 0.82 μM, a short response time of 6 s, and a large Stokes shift of 122 nm. It enables selective and reversible recognition of Cu2+ within a wide pH range of 5–9. Density functional theory calculations were performed to elucidate the binding mechanism between Cu2+ and the probe, as well as the origin of the fluorescence quenching induced by Cu2+.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1592 - 1602"},"PeriodicalIF":1.5,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149023102","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}

引用次数: 0