Journal of Analytical Chemistry最新文献_第5页

Extraction of Heavy Metal Ions from Aqueous Solutions into In Situ Formed Ionic Liquids Followed by Determination by Microwave Plasma Atomic Emission Spectrometry 从水溶液中提取重金属离子到原位形成的离子液体并采用微波等离子体原子发射光谱法测定

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701491

S. V. Smirnova, D. V. Ilin

引用次数: 0

Erratum to: Sample Screening and Determination of 214 Veterinary Drug Residues in Food Using Chromatography–High-Resolution Mass Spectrometry 用色谱-高分辨率质谱法筛选和测定食品中214种兽药残留样品的勘误

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934825010010

V. G. Amelin, O. I. Lavrukhina, A. V. Tretyakov, I. V. Batov, L. K. Kish

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Interval Estimates of the Total Content of Antioxidants for Different Analytical Assays 不同分析方法中抗氧化剂总含量的区间估计

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701508

V. I. Vershinin

{"title":"Interval Estimates of the Total Content of Antioxidants for Different Analytical Assays","authors":"V. I. Vershinin","doi":"10.1134/S1061934824701508","DOIUrl":"10.1134/S1061934824701508","url":null,"abstract":"Determination of the total content (сΣ) of similar analytes recalculated to a standard substance Xst is a commonly used but a metrologically incorrect measuring procedure, leading to significant systematic errors (B-type uncertainty). Interval estimate сΣ (Vershinin et al., 2016) is an alternative method that does not require recalculation to Xst and, in contrast to calculating total indices, slightly depends on the nature and ratio of the sought-for group components present in the sample. Such estimates are used for evaluating the total content of antioxidants (AOs) of foodstuffs. However, the dependence of these estimates on the choice of the group reagent and the signal measuring procedure is uncertain. To address this question, model mixtures of AOs with known сΣ values, ranging from 10–5 to 10–4 mol/L, were prepared and tested. Generalized signals were measured by spectrophotometry using Folin–Ciocâlteu (F–C) and FRAP assays, and traditional and interval estimates of сΣ were calculated and compared. The true values of сΣ were within the respective intervals for all model mixtures; in the case of the F–C assay, the intervals were wider and shifted towards higher сΣ values. The FRAP assay was modified using AO concentrations in mol-eq/L, reducing reaction time, and substituting the auxiliary reagent. This modification successfully brought the sensitivity coefficients of individual AOs closer to one another and made the relative widths of intervals three times narrower. Modified FRAP assay was used for the group analysis of wines, black tea infusions, and juices. Corresponding interval estimates of сΣ were obtained and compared. The unresolved issues and future research directions related to interval estimates are discussed.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 1","pages":"34 - 42"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835721","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}

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Comparative Characterization of Different Versions of Electrophoretic Determination of Mono- and Disaccharides with Prior Derivatization 先衍生法测定单糖和双糖的不同电泳方法的比较

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701600

A. V. Maliushevska, L. A. Kartsova

{"title":"Comparative Characterization of Different Versions of Electrophoretic Determination of Mono- and Disaccharides with Prior Derivatization","authors":"A. V. Maliushevska, L. A. Kartsova","doi":"10.1134/S1061934824701600","DOIUrl":"10.1134/S1061934824701600","url":null,"abstract":"The following versions of the electrophoretic determination of carbohydrates after derivatization are considered: reductive amination with p-aminobenzoic acid ethyl ester and condensation with 1-phenyl-3-methyl-5-pyrazolone. The derivatization products were separated by capillary zone electrophoresis and in the micellar mode and their characteristics were compared. Reductive amination followed by determination by micellar electrokinetic chromatography demonstrated the best values of separation efficiency (400 000–650 000 theoretical plates), selectivity (2.1–2.4), and limit of detection (LOD) (0.8–2.9 μg/mL). Derivatization conditions for reductive amination were optimized using a central composite experimental design. In-capillary sample preconcentration samples through sweeping significantly improved the LOD and enhancement factors of 13–19 were achieved. A proof-of-concept possibility of in-capillary reductive amination using detergent micelles as carriers for the derivatization agent was demonstrated. Both derivatization techniques were successfully applied to the analysis of baby food, showcasing their practical applicability.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 1","pages":"124 - 133"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835723","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 Colorimetric Detection Probe for Iron(III) with a Naphthalene-Based Schiff Base 使用萘基希夫碱的铁(III)比色检测探针

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701521

Mayuri S. Kulkarni, Ashok V. Borhade, Prajkta Y. Pachorkar, Ankita M. Rayate

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Nondestructive Control of Medicines by a Colormetric Method Using a Smartphone and the PhotoMetrix PRO® Application 使用智能手机和 PhotoMetrix PRO® 应用程序，采用色度测量法对药品进行无损检测

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701533

V. G. Amelin, O. E. Emel’yanov

{"title":"Nondestructive Control of Medicines by a Colormetric Method Using a Smartphone and the PhotoMetrix PRO® Application","authors":"V. G. Amelin, O. E. Emel’yanov","doi":"10.1134/S1061934824701533","DOIUrl":"10.1134/S1061934824701533","url":null,"abstract":"The non-destructive control of levofloxacin, non-steroidal anti-inflammatory drugs, acetylsalicylic acid, and vinpocetine in medicines by their intrinsic fluorescence and diffuse reflectance of near-IR radiation using a smartphone and a 3D-printed device is proposed. Blister packs and tablet shells slightly reduce the intensity of the diffuse reflectance signal at a wavelength of 850 nm and fluorescence due to UV irradiation (390 nm), which is confirmed by a comparative analysis of the results of colorimetric measurement in samples of medicines in blister packs, without packs, and on a tablet split. A correlation is observed between the analytical signal and the mass of the active substance regardless of the study version. The data array was processed using principal component analysis (PCA), hierarchical cluster analysis (HCA), and partial least squares (PLS) regression methods using the PhotoMetrix PRO® smartphone software. It was shown that these algorithms can be used to identify drugs by their manufacturer and to determine the mass of active substances in tablets. Colorimetric signals from tablets from one manufacturer form separate clusters on dendrograms created using the HCA algorithm. The data obtained using PCA indicate the location of signals from tablets from different manufacturers in separate quadrants, which facilitates the identification of a pharmaceutical company. The use of chemometric analysis methods for determining the mass of the active substance in tablets is considered. The relative standard deviation of the analysis results does not exceed 0.04. The relative error of the analysis results does not exceed the recommended values for the preparation of medicines according to the Order of the Ministry of Health of the Russian Federation dated October 26, 2015 No. 751n.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 1","pages":"61 - 69"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835756","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

Validated Spectrophotometric Approaches to the Determination of Teriflunomide in Active Pharmaceutical Ingredients and Pharmaceutical Dosage Forms 测定活性药物成分和药物剂型中特立氟胺的经过验证的分光光度法

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S106193482470151X

Mai M. Mora, Shereen A. Boltia, Nahla S. Ismail, Hala E. Zaazaa

{"title":"Validated Spectrophotometric Approaches to the Determination of Teriflunomide in Active Pharmaceutical Ingredients and Pharmaceutical Dosage Forms","authors":"Mai M. Mora, Shereen A. Boltia, Nahla S. Ismail, Hala E. Zaazaa","doi":"10.1134/S106193482470151X","DOIUrl":"10.1134/S106193482470151X","url":null,"abstract":"Two simple UV spectrophotometric approaches were developed for the estimation of teriflunomide in both the drug substance and its pharmaceutical dosage form, even in the presence of its two main impurities (namely, A and B). Both approaches involve manipulation of ratio spectra in the range of 200–400 nm using impurity B as a divisor. The first approach involves the dual-wavelength ratio spectra method, which revealed that the absorbance difference between 258 and 301 nm is directly proportional to the concentration of teriflunomide, while impurity A shows the same absorbance. The second approach involves constructing a first derivative of the ratio spectra, with 291 nm identified as the optimum peak amplitude for teriflunomide and a zero crossing for impurity A. Validation of the developed approaches was conducted following the International Conference on Harmonization guidelines. Calibration curves were constructed with linearity ranges of 1.25–10 µg/mL of teriflunomide for both approaches. The limit of detection was found to be 0.25 µg/mL, and the limit of quantitation was found to be 0.625 µg/mL for both approaches, demonstrating good sensitivity of the proposed approaches.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 1","pages":"43 - 49"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835757","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

Erratum to: Evolution of Contactless Conductometry Methods 勘误：非接触式电导测量方法的演变

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934825010083

E. A. Yuskina, V. V. Panchuk, D. O. Kirsanov

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Ordered Mesoporous Silicas in Modern Versions of Solid-Phase Extraction 有序介孔二氧化硅在现代固相萃取中的应用

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701478

A. S. Zavalyueva, S. I. Karpov, N. A. Zatonskaya, V. F. Selemenev

{"title":"Ordered Mesoporous Silicas in Modern Versions of Solid-Phase Extraction","authors":"A. S. Zavalyueva, S. I. Karpov, N. A. Zatonskaya, V. F. Selemenev","doi":"10.1134/S1061934824701478","DOIUrl":"10.1134/S1061934824701478","url":null,"abstract":"The review systematizes information on nanostructured materials used in solid-phase extraction (SPE) and its modern versions. The main attention is paid to the consideration of nanostructured analogues of MCM-41 and SBA-15 both in classical SPE and modern versions of solid-phase microextraction, matrix solid-phase dispersion microextraction, dispersive solid-phase extraction, and magnetic SPE. The use of silicas with a hexagonal and a cubic mesophase structure makes it possible to significantly increase the recovery of analytes and improve the performance characteristics of determining both metal ions and biologically active substances in complex multicomponent matrices of real samples. An abnormally high surface area (up to 1000 m2/g and more), adjustable mesopore size, ease of modification by attaching functional groups allow a significant increase in the selectivity of solid-phase materials compared to traditionally used silicas and polymeric ion exchangers. The advantages of ordered silicas used at the stage of the extraction and preconcentration of analytes in solid-phase extraction versions, as well as in the chromatographic separation of substances similar in nature, make it possible to expand the range of linearity of the analytical signal of the analytical methods used, and the limits of detection for ions and molecules can be reduced to the level of ng/mL, ng/g.","PeriodicalId":606,"journal":{"name":"Journal of Analytical Chemistry","volume":"80 1","pages":"1 - 14"},"PeriodicalIF":1.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835631","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}

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Principle of Comprehensive Calibration of a Portable Gas Chromatograph with a Photoionization Detector for Geochemical Prospecting of Hydrocarbon Deposits 油气矿床地球化学找矿便携式光离气相色谱仪综合定标原理

IF 1 4区化学

Journal of Analytical Chemistry Pub Date : 2025-04-15 DOI: 10.1134/S1061934824701636

M. N. Baldin, V. M. Gruznov

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