Journal of Analytical Chemistry最新文献_第3页

Developing a Procedure for the Selective Determination of Vitamin E on Human Skin Surface in Applying Oil Preparations 开发一种在涂油制剂中选择性测定人体皮肤表面维生素 E 的程序

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700795

E. S. Voloshina, B. K. Zuev, A. V. Mikhailova

引用次数: 0

Validation of a High-Performance Liquid Chromatography Method for the Online Determination of Phthalates in Water at a Trace Level 在线测定水中痕量邻苯二甲酸盐的高效液相色谱法的验证

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700874

T. A. Grigorieva, A. V. Kuzmin, A. G. Gorshkov

{"title":"Validation of a High-Performance Liquid Chromatography Method for the Online Determination of Phthalates in Water at a Trace Level","authors":"T. A. Grigorieva, A. V. Kuzmin, A. G. Gorshkov","doi":"10.1134/S1061934824700874","DOIUrl":"10.1134/S1061934824700874","url":null,"abstract":"A method for the determination of phthalates in water is validated. It includes the sorption of hydrophobic components of a sample on a liquid chromatography column and the separation of analyte concentrated by online reversed-phase HPLC: for the quantitative determination of priority phthalates (PPhs) in surface waters at a trace level; qualitative assessment of the ratio of stable carbon isotopes 13C/12C in the PPh composition. It is shown that there is no contribution of PPhs from the laboratory background to the measurement results. The limits of determination (0.15−0.22 μg/L) and the accuracy of the determination (±δ = 10−20%) are found using online reversed-phase HPLC and the UV detection of the analytes. The boundary values for the 13C/12C isotope ratio are substantiated for a qualitative assessment of the results of measuring the Δ13C value in the structure of di(2-ethylhexyl) phthalate and its ingress into waters of Lake Baikal from biogenic and abiogenic sources is revealed. A procedure for determining PPhs by reversed-phase HPLC with online UV detection is tested in the field using a portable liquid chromatograph; the concentration ranges for di-n-butyl phthalate (from <0.15 to 1.6 μg/L) and di(2-ethylhexyl) phthalate (from <0.22 to 1.6 µg/L) in the coastal zone of Lake Baikal are evaluated.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518434","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 Hydroxylated Polyaromatic Hydrocarbons in Urine by Gas Chromatography–Mass Spectrometry Using Dispersive Liquid-Liquid Microextraction and Injector-Port Derivatization 利用分散液-液微萃取和进样口衍生化技术，通过气相色谱-质谱法测定尿液中的羟基化多芳烃

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700886

A. N. Alekseenko, O. M. Zhurba, A. V. Merinov, S. F. Shayakhmetov

{"title":"Determination of Hydroxylated Polyaromatic Hydrocarbons in Urine by Gas Chromatography–Mass Spectrometry Using Dispersive Liquid-Liquid Microextraction and Injector-Port Derivatization","authors":"A. N. Alekseenko, O. M. Zhurba, A. V. Merinov, S. F. Shayakhmetov","doi":"10.1134/S1061934824700886","DOIUrl":"10.1134/S1061934824700886","url":null,"abstract":"A simple, rapid, and sensitive procedure is developed for the determination of hydroxylated polycyclic aromatic hydrocarbons (2-hydroxynaphthalene, 2-hydroxyfluorene, 9-hydroxyphenanthrene, 3-hydroxyphenanthrene, 2-hydroxyphenanthrene, 1-hydroxypyrene, and 6-hydroxychrysene) in urine by gas chromatography–mass spectrometry. Sample preparation is based on dispersive liquid–liquid microextraction with trichloromethane in an acidic medium. Derivatization is carried out in a heated injector port using the reagent N,O-bistrimethylsilyltrifluoroacetamide. The type of dispersing solvent is experimentally selected and the optimal ratio of the following factors, i.e., pH value, volume of dispersing solvent, and extraction time, is found using a three-factor experiment. A high-temperature capillary column NT-8 is used in a temperature gradient mode for analysis by gas chromatography–mass spectrometry. The linearity range of the calibration function is found to be 0.5–100 ng/mL. The developed procedure for determining hydroxylated PAH in urine is tested on urine samples from aluminum production workers.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518394","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

Chromatographic Methods for Determining Free Bisphenol A in Technical and Food Products 测定工业产品和食品中游离双酚 A 的色谱法

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700746

Ya. O. Rudakov, V. F. Selemenev, A. M. Khorokhordin, A. A. Volkov

{"title":"Chromatographic Methods for Determining Free Bisphenol A in Technical and Food Products","authors":"Ya. O. Rudakov, V. F. Selemenev, A. M. Khorokhordin, A. A. Volkov","doi":"10.1134/S1061934824700746","DOIUrl":"10.1134/S1061934824700746","url":null,"abstract":"A brief overview of chromatographic methods for determining free bisphenol A (BPA) in technical and food products is presented. Bisphenol A is used as a monomer in the production of some plastics and epoxy resins. The concentration of free BPA may exceed the permissible level in food plastic containers and in food products packaged in these containers. The maximum permissible concentration of BPA in water, in water bodies of domestic and drinking water and in cultural and household water use is 0.1 mg/dm3. In European countries, the migration value of BPA for plastics in contact with food products is 0.6 mg/kg. Gas chromatography with preliminary derivatization by the silylation or acylation of the analyte is most often used to determine BPA in plastics, food products, and biological fluids. Direct determination methods have been developed using gas-liquid chromatography on heat-resistant columns. Flame ionization, fluorometric, and mass-selective detectors are used as detection devices. HPLC with optical and mass-selective detectors is used to determine BPA. Thin-layer chromatography has also been used for determining BPA. Solid-phase extraction, liquid−liquid extraction, dispersive liquid−liquid microextraction, and a combined extraction method with separation in acetonitrile (QuEChERS) are used in BPA sample preparation.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518397","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

Efficiency of Adsorbents Containing Various Carbon Allotropes, Including Modified Carbon Nanotubes 含各种碳同素异形体（包括改性碳纳米管）的吸附剂的效率

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S106193482470076X

S. S. Grazhulene, N. I. Zolotareva, I. I. Hodos

{"title":"Efficiency of Adsorbents Containing Various Carbon Allotropes, Including Modified Carbon Nanotubes","authors":"S. S. Grazhulene, N. I. Zolotareva, I. I. Hodos","doi":"10.1134/S106193482470076X","DOIUrl":"10.1134/S106193482470076X","url":null,"abstract":"The adsorption of toxic ions Be(II), Bi(III), Cd(II), Cr(III), and Pb(II), and also noble metals Ag(I), Au(III), and Pd(II), from aqueous solutions is studied using carbon nanotubes (CNTs), a magnetic nanosorbent composed of CNTs and magnetic nanoparticles (CNT@MNP), and activated carbon (AC). An advantage of CNT-based adsorbents over AC in terms of capacity was demonstrated, with an increase of approximately 1.5–2 times. The adsorption capacity of the synthesized magnetic adsorbent depends on the morphology of CNTs grown on iron subgroup catalysts: nickel (CNT(Ni)), cobalt (CNT(Co)), and iron (CNT(Fe)). CNT@MNP exhibited superior performance over other carbon adsorbents in magnetic solid-phase extraction, effectively separating solid and liquid phases. Additionally, composite adsorbents containing CNT(Co) and CNT(Fe) were noted for their cost-effectiveness, as they yielded satisfactory results, surpassed those obtained with the individual CNT-based adsorbents. Procedures were developed using these carbon adsorbents and their performance in the determination of elements in aqueous solutions by arc atomic emission spectrometry was estimated.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518360","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

Kinetic Spectrophotometric Determination of Memantine Hydrochloride Based on the Formation of Its Dinitrochlorobenzene Adduct 基于二硝基氯苯加合物形成的盐酸美金刚碱动力学分光光度测定法

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2024-10-22 DOI: 10.1134/S1061934824700813

H. L. Varu, N. P. Kapuriya, J. J. Bhalodia, A. H. Bapodra, M. A. Ambasana

{"title":"Kinetic Spectrophotometric Determination of Memantine Hydrochloride Based on the Formation of Its Dinitrochlorobenzene Adduct","authors":"H. L. Varu, N. P. Kapuriya, J. J. Bhalodia, A. H. Bapodra, M. A. Ambasana","doi":"10.1134/S1061934824700813","DOIUrl":"10.1134/S1061934824700813","url":null,"abstract":"A facile kinetic spectroscopic technique was devised and validated for the precise estimation of memantine hydrochloride. This method depends upon the measurement of various kinetic characteristics of the reaction between the drug and 1-chloro-2,4-dinitrobenzene in an alkaline medium at 70°C. The resultant memantine-dinitrobenzene complex exhibits a distinctive absorbance maximum at 290.5 nm. Spectroscopic analysis was conducted by scanning the complex within the 200 to 800 nm range using a Shimadzu UV-1900 spectrophotometer. Experimental conditions, including reagent concentration, base quantity, order of addition, and reaction temperature, were optimized. The reaction mechanism and stoichiometric ratio of the drug with the reagent were elucidated. Employing various kinetic methodologies such as initial rate, fixed time, and fixed absorbance under optimal conditions enabled the construction of calibration curves and accurate estimation of memantine hydrochloride. The method demonstrated linearity within the concentration range of 3.0 to 7.0 μg/mL. Precision assessment yielded satisfactory relative standard deviations of 2.05 for intra-day and 1.96 for inter-day precision studies. Accuracy studies revealed mean recoveries ranging between 98.55–102.34%. Moreover, the proposed method effectively determined memantine hydrochloride in a commercial formulation.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142518389","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 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":null,"pages":null},"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

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":null,"pages":null},"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