Journal of Analytical Chemistry最新文献_第8页

Determination of Tioconazole via Spectrophotometry Using Charge Transfer Complex Formation 利用电荷转移络合物形成的分光光度法测定替康唑

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700783

Eman Yossri Frag, Asmaa M. Mahmoud, Marwa El-Badry Mohamed

引用次数: 0

Chromatographic Methods in the Identification and Determination of the Component Composition and Quality of Wines 鉴别和确定葡萄酒成分组成和质量的色谱法

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700734

Z. A. Temerdashev, A. G. Abakumov, O. N. Shelud’ko, Yu. F. Yakuba, T. G. Tsyupko

{"title":"Chromatographic Methods in the Identification and Determination of the Component Composition and Quality of Wines","authors":"Z. A. Temerdashev, A. G. Abakumov, O. N. Shelud’ko, Yu. F. Yakuba, T. G. Tsyupko","doi":"10.1134/S1061934824700734","DOIUrl":"10.1134/S1061934824700734","url":null,"abstract":"A review of the literature and regulatory documents on the identification and determination of organic compounds that form the component composition and consumer properties of wines is presented. It is noted that the capabilities, information content, and versatility of modern chromatographic methods in combination with mathematical software have significantly increased the degree of automation and reliability of obtaining data on the identification and determination of a wide range of components in wine. Conditions for the determination of high and low concentrations of organic compounds responsible for the qualitative and regional characteristics of wines in the component composition are discussed. Various gas chromatography and gas chromatography–mass spectrometry methods providing the reliable determination of relatively volatile components are most widely used to solve the problems of identification and determination of components responsible for the advantages and disadvantages of wine products. Nonvolatile components of wines are determined by high-performance liquid chromatography with various detection methods and by high-performance capillary electrophoresis. The main approaches to establishing the profile and regional identity of wines in terms of component composition, which combine the capabilities of modern analytical methods with statistical analysis methods (multiple regression analysis, general linear models, multidimensional scaling, covariance and canonical analysis, classification and machine learning methods, and neural networks) are analyzed. Examples of their use in actual practice are demonstrated.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1364 - 1386"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518396","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

Using a Humate-Based Magnetic Sorbent and GC–MS for the Determination of Phenolic Xenoestrogens in Bottom Sediments 使用腐殖酸基磁性吸附剂和气相色谱-质谱法测定底层沉积物中的酚类异雌激素

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700862

A. S. Gubin, P. T. Sukhanov, A. A. Kushnir, Kh. S. Shikhaliev, M. A. Potapov

{"title":"Using a Humate-Based Magnetic Sorbent and GC–MS for the Determination of Phenolic Xenoestrogens in Bottom Sediments","authors":"A. S. Gubin, P. T. Sukhanov, A. A. Kushnir, Kh. S. Shikhaliev, M. A. Potapov","doi":"10.1134/S1061934824700862","DOIUrl":"10.1134/S1061934824700862","url":null,"abstract":"A sorbent with magnetic properties, functionalized with humates, in combination with gas chromatography–mass spectrometry is proposed for the determination of phenolic xenoestrogens (ED) in bottom sediments. The octylphenol (OP), nonylphenol (NP), and bisphenol A (BPA) ED are chosen as test samples. Along with ED, the distribution of the naturally occurring estrogen, 17β-estradiol (ES), is studied. Sorption preconcentration is carried out under dynamic conditions: a sorbent weighing 0.5 g is placed in a borosilicate glass column, on both sides of which magnets are placed to immobilize the sorbent. The analytical characteristics of the determination method are established using model samples of bottom sediments selected in a background area with a minimal anthropogenic impact. The limit of quantification for ED is 30–60 ng/kg (dry weight). In analyzing real samples, the sensitivity of the method is reduced by 3–4 times due to matrix effects of the presence of petroleum products in waters. The ED content of bottom sediments at the site of wastewater discharge into the river Don near the city of Voronezh, as well as on the Black Sea coast of the Caucasus (area of the city of Tuapse and the village of Olginka) was monitored. The maximum concentrations of OP, NP, BPA, and ES in bottom sediments were found in the area of the port of Tuapse, where they were 5.7, 8.1, 6.2 and 0.9 µg/kg, respectively.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1473 - 1482"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518433","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

Simultaneous Determination of Polychlorinated Biphenyls and Polyaromatic Hydrocarbons in Natural Waters by Dispersive Liquid–Liquid Microextraction and Gas Chromatography–Mass Spectrometry 利用分散液-液微萃取和气相色谱-质谱法同时测定自然水体中的多氯联苯和多芳烃

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700849

Z. A. Temerdashev, T. N. Musorina, T. A. Chervonnaya

引用次数: 0

Online Flow-Batch Dispersive Liquid-Liquid Microextraction System for ET AAS Determination of Molybdenum in Water and Complex Matrices 在线流动批次分散液-液微萃取系统用于水和复杂基质中钼的 ET AAS 检测

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700837

F. Tissot, J. C. Rodríguez, L. Gutiérrez

{"title":"Online Flow-Batch Dispersive Liquid-Liquid Microextraction System for ET AAS Determination of Molybdenum in Water and Complex Matrices","authors":"F. Tissot, J. C. Rodríguez, L. Gutiérrez","doi":"10.1134/S1061934824700837","DOIUrl":"10.1134/S1061934824700837","url":null,"abstract":"This work presents a novel on-line flow-batch dispersive liquid-liquid microextraction system for the determination of molybdenum in water, meat, and vegetable material with electrothermal atomic absorption spectroscopy (ET AAS) as detection technique. After optimizing the experimental conditions, the analytical performance of the new methodology was determined. A limit of detection of 0.03 µg/L for water and 0.02 µg/kg for the other matrices, as well as an enrichment factor of 130 were obtained employing this methodology. Standard reference materials were used for accuracy and precision evaluation. No significant differences were found at the 95% confidence level between the certified and obtained values, and precision expressed as repeatability (RSD) was better than 5% in all cases. The developed automated methodology offers great advantages when compared to manual dispersive liquid-liquid microextraction, such as low risk of contamination while working in closed systems, minimal handling, reduced exposure of the analyst to the chemical products, greater security, improvement in repeatability and the elimination of the laborious and time-consuming procedure of phase separation by centrifugation. The method was successfully applied for the determination of molybdenum in natural groundwater, bovine and sheep meat, and pasture samples.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1450 - 1458"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518438","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

Thermodynamic Modeling of the Composition of the Main Background Ions and Determination of Gas-Kinetic Temperature in the Normal (“Hot”) Inductively Coupled Plasma 正常（"热"）电感耦合等离子体中主要背景离子成分的热力学建模和气体动力学温度的测定

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700825

A. A. Pupyshev, P. V. Kel’, M. Yu. Burylin, A. G. Abakumov, P. G. Abakumov

{"title":"Thermodynamic Modeling of the Composition of the Main Background Ions and Determination of Gas-Kinetic Temperature in the Normal (“Hot”) Inductively Coupled Plasma","authors":"A. A. Pupyshev, P. V. Kel’, M. Yu. Burylin, A. G. Abakumov, P. G. Abakumov","doi":"10.1134/S1061934824700825","DOIUrl":"10.1134/S1061934824700825","url":null,"abstract":"A possibility of studying effects of the main background ions formed by the main elements of inductively coupled plasma (H, N, O, and Ar) at the working parameters of the normal (“hot”) plasma mode by thermodynamic modeling is assessed. Such ions, responsible for the strongest spectral interferences in the mass spectra are always observed upon the injection of aqueous (“wet”) sample solutions into inductively coupled plasma mass spectrometers (ICP MS). The quantitative composition of the main background ions in an ICP MS is calculated as a function of plasma temperature in the temperature range from 3000 to 8000 K using thermodynamic modeling. The results of modeling were compared with the experimental data on the measured mass spectra of the main background ions and a high degree of correlation between the theoretical and experimental results was shown. The agreement between the results of calculations the experimental data validates the thermodynamic model of thermochemical processes in an ICP MS used and its applicability to subsequent calculations in fulfilling analytical tasks. A possibility of the unambiguous assessment of gas-kinetic plasma temperature is confirmed by comparing the theoretical and experimental mass spectra of the main ICP background ions in a normal mode. It was found that the calculated and experimental data on the concentration of only NO+ ions do not agree with the regularities noticed for the other background ions in the normal ICP mode.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1439 - 1449"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518393","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 Zeolites in High-Performance Liquid Chromatography 沸石在高效液相色谱中的应用

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700722

V. D. Luzanova, N. B. Rozhmanova, S. N. Lanin, P. N. Nesterenko

{"title":"Application of Zeolites in High-Performance Liquid Chromatography","authors":"V. D. Luzanova, N. B. Rozhmanova, S. N. Lanin, P. N. Nesterenko","doi":"10.1134/S1061934824700722","DOIUrl":"10.1134/S1061934824700722","url":null,"abstract":"Inorganic zeolites, or microporous crystalline aluminosilicates, possess high porosity, well-developed specific surface area, uniform pores, and ion-exchange properties, which determine their molecular sieve and adsorption properties. The use of zeolites as catalysts, desiccants for solvents and gases, and selective adsorbents for the separation of low-molecular-weight compounds is widely known. Zeolites also serve extensively as packing materials for chromatographic columns in gas-adsorption chromatography. However, their application to high-performance liquid chromatography (HPLC) is less recognized. In HPLC, the retention of adsorbates depends not only on adsorption interactions but also on the molecular sieve effect in the micropores and kinetically selective effects. Additional interactions with the mobile phase components alter the thermodynamic parameters of the adsorbates interaction with the zeolite, decrease effective pore size, and hinder the diffusion of the separated compounds into the adsorbent’s pores. Despite these challenges, zeolites remain promising adsorbents due to their strictly determined pore size (dpore) and geometry, as well as their customizable polarities, which ensure high selectivity for the separation of low-molecular-weight compounds. The most promising zeolites for HPLC are wide-pore zeolites (dpore 0.6–0.8 nm) with 8, 10, 12, and 14-member ring channels. This review offers a concise overview of the classification, composition, and structure of zeolites and their impact on the adsorption properties of these adsorbents. Data on the use of zeolites in HPLC are also systematized.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1353 - 1363"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518398","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

Micellar Microextraction with Alkyl Polyglucosides for the Preconcentration and Spectrophotometric Determination of Phosphate Ions in Aqueous Media 用烷基多糖苷进行微孔微萃取以预浓缩和分光光度法测定水介质中的磷酸盐离子

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700771

I. I. Timofeeva, M. A. Kochetkova, D. D. Dvoinykh, Ya. V. Safinskaya, E. A. Zubakina, A. V. Bulatov

{"title":"Micellar Microextraction with Alkyl Polyglucosides for the Preconcentration and Spectrophotometric Determination of Phosphate Ions in Aqueous Media","authors":"I. I. Timofeeva, M. A. Kochetkova, D. D. Dvoinykh, Ya. V. Safinskaya, E. A. Zubakina, A. V. Bulatov","doi":"10.1134/S1061934824700771","DOIUrl":"10.1134/S1061934824700771","url":null,"abstract":"A micellar microextraction technique has been developed for the preconcentration and spectrophotometric determination of phosphate ions in aqueous media. This method is based on the formation of a reduced form of molybdophosphoric heteropolyacid and its extraction from the aqueous phase into a supramolecular solvent. The supramolecular solvent phase is formed in situ by introducing an amphiphile and a coacervation agent into the acidic aqueous phase. The feasibility of using biodegradable alkyl polyglucoside (C8–C10) as an amphiphile and carboxylic acids as coacervation agents has been investigated. In the acidic medium required for the formation of the reduced form of molybdophosphoric heteropolyacid, the phase of the supramolecular solvent is separated. The maximum absorbance of the extract is achieved using pivalic acid as the coacervation agent. The procedure is characterized by the limit of detection (3σ) for phosphate ions 5 µg/L. The technique is environmentally friendly and does not require the use of expensive equipment.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1408 - 1414"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518359","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

Silagerm 8040-Based Planar Microfluidic Chips for Sampling and Sample Preparation in the Analysis of Gas Media 基于 Silagerm 8040 的平面微流控芯片，用于气体介质分析中的取样和样品制备

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700758

A. E. Margaryan, I. A. Platonov, I. N. Kolesnichenko, E. A. Novikova, A. S. Karsunkina

引用次数: 0

Online Preconcentration of Bisphenol A on a Magnetic Molecularly Imprinted Sorbent and its Determination in Natural Media 磁性分子印迹吸附剂在线预富集双酚 A 及其在天然介质中的测定

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700850

A. S. Gubin, A. A. Kushnir, P. T. Sukhanov

{"title":"Online Preconcentration of Bisphenol A on a Magnetic Molecularly Imprinted Sorbent and its Determination in Natural Media","authors":"A. S. Gubin, A. A. Kushnir, P. T. Sukhanov","doi":"10.1134/S1061934824700850","DOIUrl":"10.1134/S1061934824700850","url":null,"abstract":"An original bench-scale installation based on the principles of online magnetic solid-phase extraction is developed. The setup includes a borosilicate glass column packed with Fe3O4@MIP-BPA, which is fixed with two neodymium magnets. Compared to using one magnet, a design with two magnets ensures the uniform distribution of the sorbent over the entire cross-section of the column. The highest concentration factors (EF = 3216) and the degree of desorption of bisphenol A (BPA) are achieved, respectively, at a volumetric solution flow rate (W) of 2.0 mL/min and with eluting BPA with methanol (W = 0.4 mL/min). The determination of BPA in concentrates from model media by GC−MS provides high sensitivity of the developed method for determining BPA. In analyzing model solutions prepared in distilled water, the limit of detection (LOD) is 0.3 ng/L. In analyzing river water, the LOD increases by approximately 2 times. In analyzing soils, LOD = 2.2 ng/kg dry weight. Soils, compared to water bodies, contain a larger number of interfering components; the sensitivity of the method is reduced by 7–8 times. Bottom sediments are even more contaminated; the LOD more than doubles compared to the determination of BPA in soils.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"79 10","pages":"1466 - 1472"},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518435","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