Journal of Analytical Chemistry最新文献_第5页

Sorbents Made of Cross-Linked Collagen and Styrene–Divinylbenzene Copolymers for Oil Spill Response 交联胶原蛋白和苯乙烯-二乙烯苯共聚物制备的吸着剂用于溢油响应

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700437

P. S. Zagoskin, G. S. Minakov, Yu. N. Romanova, M. Yu. Koroleva

{"title":"Sorbents Made of Cross-Linked Collagen and Styrene–Divinylbenzene Copolymers for Oil Spill Response","authors":"P. S. Zagoskin, G. S. Minakov, Yu. N. Romanova, M. Yu. Koroleva","doi":"10.1134/S1061934826700437","DOIUrl":"10.1134/S1061934826700437","url":null,"abstract":"A comparative study of the sorption properties of sorbents composed of highly porous copolymers of styrene and divinylbenzene with an average pore size from 3.5 to 44 μm and macroporous sorbents composed of cross-linked collagen of an average size of ~80 μm for petroleum feedstock and petroleum products of a wide viscosity range from 15 to 11450 mPa s was performed. Using scanning electron microscopy and densitometry, it was found that all sorbents possess high porosity, exceeding 90 vol %. The rate of sorption and the sorption capacity significantly depend on the viscosity of the petroleum feedstock and the sorbent structure. It was shown that, for the rapid collection of petroleum feedstock, it is preferable to use sorbents made of cross-linked collagen C-80, which most quickly absorbs petroleum feedstock of different viscosities. Even in the extraction of highly viscous fuel oil, sorbent capacity of 9.4 g/g was achieved in approximately 1 min. Moreover, the rate of oil feedstock sorption by the C-80 sorbent is higher than the rate of water sorption. If the oil film on the water surface is very thin, it is worth using sorbents composed of styrene and divinylbenzene copolymers. Under the conditions of a prolonged contact with a contaminated water surface, it is recommended to use the SD-4 sorbent, the sorption rate of which varies in the range from 0.35 to 0.12 kg/(m2 s) in extracting oil of a viscosity of 15 to 1370 mPa s; this sorbent is additionally characterized by the highest capacity of up to 28–30 g/g. If a more rapid extraction of oil feedstock from the water surface is required, sorbents with a larger pore size can be used. However, one should take into account the viscosity of the sorbed liquid because of a possibility of the competitive sorption of water.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"967 - 976"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349746","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

Cascade of Centrifugal Mini-Extractors as a Device for Preparative Liquid–Liquid Chromatography 制备液-液色谱的离心微型萃取器级联装置

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700425

A. E. Kostanyan, D. V. Lobovich, Yu. A. Zakhodyaeva, E. M. Ivannikova, A. A. Voshkin

引用次数: 0

Mass Spectra of By-Products of Phenolphthalein Anilide Synthesis 酚酞苯胺合成副产物的质谱分析

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700486

N. D. Kagramanov, A. N. Rodionov, S. N. Salazkin, V. V. Shaposhnikova

{"title":"Mass Spectra of By-Products of Phenolphthalein Anilide Synthesis","authors":"N. D. Kagramanov, A. N. Rodionov, S. N. Salazkin, V. V. Shaposhnikova","doi":"10.1134/S1061934826700486","DOIUrl":"10.1134/S1061934826700486","url":null,"abstract":"In this study, an attempt was made to identify impurities in phenolphthalein anilide synthesized by the interaction of aniline with phenolphthalein in the presence of aniline hydrochloride in aniline (at 200°C). To simplify the separation of impurities, the reaction of aniline with aniline chloride ({text{PhNH}}_{3}^{ + })Cl– (without phenolphthalein) was carried out under the conditions of phenolphthalein anilide synthesis. The resulting powder was analyzed by capillary chromatography–mass spectrometry and tandem mass spectrometry (MS/MS) with electrospray ionization (ESI). Using capillary chromatography–mass spectrometry, mass spectra of seven volatile impurities were obtained and their composition was determined. The main impurity was diphenylamine (81%). The ESI-MS/MS analysis of the powdered reaction product of aniline with aniline chloride revealed the base peaks of three low-volatile impurities formed during the synthesis. Increasing the ionization energy and sensitivity of the MS/MS analysis allowed us to identify their molecular peaks, as well as the base and major fragment ions. Comparison of the three MS/MS spectra with the total spectrum (DIP) confirmed their correspondence and suggested that at least three linear by-products (tetra-, penta-, and hexanuclear anilides) were formed during the synthesis of phenolphthalein anilide.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1058 - 1065"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349716","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

Application of Glow Discharge Atomic Emission Spectrometry to Layer-by-Layer Analysis of Zinc-Coated Steels 辉光放电原子发射光谱法在镀锌钢逐层分析中的应用

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700474

M. Yu. Lepilina, E. V. Yakubenko, T. N. Ermolaeva, V. B. Baranovskaya

{"title":"Application of Glow Discharge Atomic Emission Spectrometry to Layer-by-Layer Analysis of Zinc-Coated Steels","authors":"M. Yu. Lepilina, E. V. Yakubenko, T. N. Ermolaeva, V. B. Baranovskaya","doi":"10.1134/S1061934826700474","DOIUrl":"10.1134/S1061934826700474","url":null,"abstract":"A procedure for layer-by-layer analysis of zinc coatings on rolled steel products has been developed to determine the concentrations of regulated alloying elements within the following ranges: Mg 0.03–5.04%, Al 0.07–12.4%, Si 0.06–0.27%, Fe 0.7–98.0%, Cu 0.2–5.95%, Zn 80.0–99.0%, Sn 0.01–0.50%, and Pb 0.003–2.07%, in accordance with the requirements of TU 24.43.12-018-00194228-2021. To ensure uniform cathodic sputtering of the material under investigation, the parameters of the glow discharge plasma were experimentally selected, specifically a power of 40 W and a pressure of 700 Pa. Calibration curves in the coordinates of emission intensity versus element concentration multiplied by the sputtering rate were constructed using standard samples of zinc alloys: TsAM9-1.5, TsAM10-5, TsAM9-1.5L, TsAM10-5L, TsAM9-1.5ch, TsAM10-5ch (set M28), TsF4, TsA4o (set M92), TsAM9-1.5 (set M160); 41XZ3: IMPURITIES IN ZINC (CAST), and pure iron 098. The relative sputtering rates of the standard samples, enabling the acquisition of depth profiles of elemental distribution in the coordinates concentration (c, %) versus depth (h, µm), were calculated taking into account the depth of cathodic etching measured using a profilometer. The necessity of correcting the calibration curves using a set of mathematical algorithms based on the weighted least squares method and uncertainty metrics is demonstrated. The accuracy of determining the concentrations of Mg, Al, Si, Cu, Sn, and Pb was evaluated using Student’s t-test, and optimal values of the glow discharge plasma operating parameters, as well as the conditions for applying the set of mathematical algorithms for calibration curve correction, were established. The procedure was validated using industrial samples of rolled steel with zinc–aluminum–magnesium coatings and is recommended for use in laboratories of metallurgical enterprises.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1025 - 1035"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349713","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

Use of Sorbents Based on Silica and Poly(Styrene–Divinylbenzene) for the Determination of Synthetic Sweeteners in Beverages by HPLC 用高效液相色谱法测定饮料中合成甜味剂的二氧化硅和聚苯二乙烯基吸附剂

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700401

A. F. Borodina, D. S. Polyakova, N. Yu. Chikurova, A. V. Gorbovskaia, M. A. Statkus, G. I. Tsisin, O. A. Shpigun, A. V. Chernobrovkina

引用次数: 0

Determination of Deuterium Content of Deuterium-Enriched Water by Thermal Conversion/Elemental Analysis-Isotope Ratio Mass Spectrometry 热转换/元素分析-同位素比质谱法测定富氘水中的氘含量

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934825603445

Shouhui Dai, Hui Yang, Qingxia Liu, Menyao Li, Fazuo Wang

{"title":"Determination of Deuterium Content of Deuterium-Enriched Water by Thermal Conversion/Elemental Analysis-Isotope Ratio Mass Spectrometry","authors":"Shouhui Dai, Hui Yang, Qingxia Liu, Menyao Li, Fazuo Wang","doi":"10.1134/S1061934825603445","DOIUrl":"10.1134/S1061934825603445","url":null,"abstract":"A method was developed for the determination of the deuterium content (hydrogen isotope ratio) of deuterium-enriched water (DEW) by thermal conversion/elemental analysis-isotope ratio mass spectrometry. Aliquots of water samples were injected into a reaction furnace at 1350°C, and the products were separated on a column at 75°C using helium as the carrier gas. Each water sample was analyzed five or six times. By neglecting the first three data points, the memory effect could be avoided, and the average of the remaining data points was calculated as the final result. The potential influence of the headspace volume on the measured results was avoided by leaving no headspace in the sample vial. A multi-point standard plot was used for sample calibration, and the linear range for the deuterium content of water was 155.76–2653.59 μg/g. Single-point correction should be avoided, as it may lead to greater deviations. For real DEW samples, the standard deviation (SD) of the deuterium content after excluding the first three data points from eight consecutive measurements was 0.12 μg/g. Three measurements were taken within 30 days, and the deviation of the measured deuterium content was 0.22 μg/g, indicating good repeatability and reproducibility. The SD of the deuterium content of real DEW samples between that measured by the present method and that determined by laser spectroscopy was below 1 μg/g, demonstrating good accuracy of the method. The establishment of this method may provide a reference and inspiration for the determination of the deuterium content of DEW samples.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1066 - 1072"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349714","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

Effect of Physicochemical Characteristics of Sorbents on the Quality of the Separation of Hydrocarbon Groups by Liquid Adsorption Chromatography 吸附剂的理化性质对液相吸附色谱法分离烃基质量的影响

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700395

D. I. Panyukova, E. Yu. Savonina, T. A. Maryutina

引用次数: 0

Label-Free Impedimetric Aptasensor for the Efficient Detection of Escherichia coli O157:H7 in Diverse Food Matrices: Application to Milk 高效检测食品基质中大肠杆菌O157:H7的无标签阻抗法适体传感器：在牛奶中的应用

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934825604050

Rasoul Shemshadi, Issa Mousazadeh Moghaddampour, Mohadeseh Izadi

{"title":"Label-Free Impedimetric Aptasensor for the Efficient Detection of Escherichia coli O157:H7 in Diverse Food Matrices: Application to Milk","authors":"Rasoul Shemshadi, Issa Mousazadeh Moghaddampour, Mohadeseh Izadi","doi":"10.1134/S1061934825604050","DOIUrl":"10.1134/S1061934825604050","url":null,"abstract":"In this study, an impedimetric aptasensor was designed using a glassy carbon electrode (GCE) modified with a nanocomposite consisting of reduced graphene oxide and gold nanoparticles. After adjusting the electrode surface, aptamer strands were immobilized for the detection of Escherichia coli O157:H7. At the optimized conditions, the aptasensor exhibited a linear range of 2.5 to 2.5 × 107 CFU/mL with a detection limit of 2.3 CFU/mL. Nanomaterial characterization was carried out by Fourier transform infrared spectroscopy, field emission scanning electron microscopy, and energy dispersive X‑ray spectroscopy analyses. Among various techniques, electrochemical impedance spectroscopy played a key role in characterizing the modified GCE, complemented by differential pulse voltammetry. Notable advantages encompass high levels of selectivity and sensitivity, along with low production costs and ease of preparation. The aptasensor was successfully applied to milk samples. This work establishes a foundation for improving nanocomposite-based impedimetric aptasensors. Owing to its facile preparation and the inherently automatable nature of impedance microbiology, the developed biosensor can be easily implemented in industrial machines or portable devices.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1073 - 1086"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349730","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

Fluorimetric Sensing of Proteins Using a Europium(III)-2-Thenoyltrifluoroacetone-Silver Nanoparticle-Protein System 使用Europium(III)-2-Thenoyltrifluoroacetone-Silver nanopparticle - protein系统的蛋白质荧光传感

IF 1.5 4区化学

Journal of Analytical Chemistry Pub Date : 2026-07-01 DOI: 10.1134/S1061934826700462

Md. Kamruzzaman, Md. Hanif Munshi, Md. Lalon Mia

{"title":"Fluorimetric Sensing of Proteins Using a Europium(III)-2-Thenoyltrifluoroacetone-Silver Nanoparticle-Protein System","authors":"Md. Kamruzzaman, Md. Hanif Munshi, Md. Lalon Mia","doi":"10.1134/S1061934826700462","DOIUrl":"10.1134/S1061934826700462","url":null,"abstract":"In the presence of 2-thenoyltrifluoroacetone (TTA) and silver nanoparticles (AgNPs), the fluorescence probe europium(III) has been used to produce a sensitive spectrofluorimetric method for the determination of bovine serum albumin (BSA). The luminescence spectra of the Eu3+-TTA system were recorded upon excitation at 373 nm and monitoring the distinctive Eu3+ emission at 614 nm, which was greatly amplified upon complexation with BSA. The fluorescence resonance energy of the Eu3+-TTA-BSA complex was transferred to the AgNPs, resulting in a marked increase in the fluorescence intensity of the Eu3+-BSA compound. This effect was significantly enhanced in the presence of TTA. A linear calibration curve between fluorescence intensity and BSA concentration was observed in the range of 0.05–1.2 ng/mL (r = 0.9981). The BSA limit of detection was determined to be 0.02 ng/mL, and for five replicates of 2.5 ng/mL BSA, the relative standard deviation was 1.15%. The suggested approach can be successfully used for the determination of BSA in biological samples with good reproducibility; it is straightforward and exhibits a wide linear range and higher sensitivity. The luminescence mechanism was also examined using ultraviolet absorption spectra.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"1017 - 1024"},"PeriodicalIF":1.5,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148349743","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

Continuous-Flow Extraction of Microplastics in a Centrifugal Extractor Using a Water–Oil System 用水-油系统离心萃取器连续萃取微塑料

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-31 DOI: 10.1134/S1061934826700334

O. N. Katasonova, M. S. Ermolin

引用次数: 0