Journal of Analytical Chemistry最新文献_第10页

Simultaneous Determination of Residues of the Most Important Veterinary Drugs in Environmental Samples by Chromatography-Mass-Spectrometry 色谱-质谱法同时测定环境样品中最重要兽药的残留

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700152

D. Yu. Nekrasov, O. I. Lavrukhina, I. V. Batov, A. V. Tret’yakov

引用次数: 0

High-Efficiency Alternating Current-Electrokinetic Micromixer: Design, Simulation, and the Role of Sidewall Obstacles 高效交流-电动微混合器：设计、模拟和侧壁障碍的作用

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934825601045

Elnaz Poorreza, Nader Ahmadzadeh Khosroshahi

{"title":"High-Efficiency Alternating Current-Electrokinetic Micromixer: Design, Simulation, and the Role of Sidewall Obstacles","authors":"Elnaz Poorreza, Nader Ahmadzadeh Khosroshahi","doi":"10.1134/S1061934825601045","DOIUrl":"10.1134/S1061934825601045","url":null,"abstract":"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.","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}

引用次数: 0

Gas Chromatographic Determination of Acyclic and Cyclic Organic Carbonates in Aqueous Environment 水环境中无环和环状有机碳酸盐的气相色谱测定

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700255

M. G. Pervova, M. A. Samorukova, V. I. Saloutin

引用次数: 0

Portable Chalcogenide Quantum Dot-Based Sensing System for Heavy Metal Cation Detection 基于硫系量子点的便携式重金属离子检测传感系统

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700139

V. S. Kulik, E. D. Gribova, S. A. Novikova, N. N. Troshkina

引用次数: 0

Determination of Chlorine in Reference Materials of Marine Sediments of the OOPE and SDO Series by X-ray Fluorescence Spectrometry x射线荧光光谱法测定OOPE和SDO系列海洋沉积物标准物质中的氯

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700231

I. V. Khokhlova, V. P. Kolotov, T. G. Kuz’mina, T. V. Romashova, M. A. Troneva

{"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, V. P. Kolotov, T. G. Kuz’mina, T. V. Romashova, M. A. Troneva","doi":"10.1134/S1061934826700231","DOIUrl":"10.1134/S1061934826700231","url":null,"abstract":"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%.","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}

引用次数: 0

Volatile Organic Compounds Forming Unpleasant Odor in Wastewater from Fisheries 渔业废水中挥发性有机化合物产生难闻气味

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700188

L. I. Sokolova, I. Yu. Khutornaya, A. B. Gatsanyuk, E. V. Lipchenko

引用次数: 0

Assessment of the Simultaneous Determination of Unsymmetrical Dimethylhydrazine and Three Transformation Products in Model Solutions by Gas Chromatography–Mass Spectrometry 气相色谱-质谱法同时测定模型溶液中不对称二甲肼和三种转化产物的研究

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700140

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

{"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, M. D. Shachneva, M. V. Beliakov, E. I. Savelieva","doi":"10.1134/S1061934826700140","DOIUrl":"10.1134/S1061934826700140","url":null,"abstract":"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 N-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.","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}

引用次数: 0

Microfluidic Paper-Based Analytical Devices as Promising Platforms for Resource-Efficient Chemical Analysis: Methods of Fabrication and Signal Detection 基于纸的微流控分析装置作为资源高效化学分析的有前途的平台：制造方法和信号检测

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S106193482670019X

A. A. Furletov, A. V. Yakimenko, V. V. Apyari, S. G. Dmitrienko

引用次数: 0

Determination of Polychlorinated Biphenyls in Aquatic Organisms as Pollution Bioindicators at Ultratrace Concentration Levels 水生生物中多氯联苯作为污染生物指标的超痕量浓度测定

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700176

O. V. Kustova, A. G. Gorshkov

{"title":"Determination of Polychlorinated Biphenyls in Aquatic Organisms as Pollution Bioindicators at Ultratrace Concentration Levels","authors":"O. V. Kustova, A. G. Gorshkov","doi":"10.1134/S1061934826700176","DOIUrl":"10.1134/S1061934826700176","url":null,"abstract":"A procedure for the determination of indicator congeners of polychlorinated biphenyls (PCBs) in the aquatic organisms of Lake Baikal, an aquatic ecosystem characterized by trace levels of pollutants in water, has been validated. The procedure included ultrasonic extraction of analytes from samples weighing up to 0.5 g and purification of the extracts with sulfuric acid. Gas chromatography–mass spectrometric analysis with detection of analytical peaks in the multiple reaction monitoring mode and the use of 13C-labeled surrogate internal standards ensured the determination in a range of 0.10 to 15 ng/g with an accuracy of ±δ = 24–28% (P = 0.95) and, for congener no. 180, in a range of 0.010 to 15 ng/g with an accuracy of ±δ = 45%. The composition and accumulation level of PCBs, including indicator and dioxin-like congeners, were determined in the Baikal fish species Coregonus migratorius (Georgi, 1775), Comephorus baicalensis (Pallas, 1776), and Comephorus dybowskii (Korotneff, 1904) and in the mollusks Benedictia baiсalensis (Gerstfeldt, 1859) and Radix auricularia (Linnaeus, 1758). The studied aquatic organisms were evaluated as sensitive indicators of ultratrace amounts of PCBs in the water of Lake Baikal.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"81 :","pages":"581 - 591"},"PeriodicalIF":1.1,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808263","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

Determination of Cinnamaldehyde in Cinnamon Essential Oil Based on Iodometry Using Bisulfite 亚硫酸氢盐碘量法测定肉桂精油中的肉桂醛

IF 1.1 4区化学

Journal of Analytical Chemistry Pub Date : 2026-05-04 DOI: 10.1134/S1061934826700206

Zhuo Chen, Nan Li

引用次数: 0