Analytical Methods最新文献

{"title":"Magnesium-doped lithium manganese oxide composite with mesoporous silica for methylene blue dye and heavy metal removal†","authors":"Arun Kumar Das and Hitesh Saravaia","doi":"10.1039/D4AY01820F","DOIUrl":"10.1039/D4AY01820F","url":null,"abstract":"<p >In this study, magnesium-doped lithium manganese oxide nanoparticles were prepared through a solid-state reaction technique, and their surface was modified with mesoporous silica. The surface-modified material exhibited a significantly enhanced BET surface area from 5.791 to 66.058 m<small>²</small> g<small>⁻¹</small>, thus enhancing the adsorption property. The prepared material was characterized using advanced analytical techniques such as powder XRD (PXRD), FT-IR, BET surface area analysis, and scanning electron microscopy (SEM). The effect of the adsorbent dosage, contact time, pH, and initial concentration on adsorption characteristics was evaluated for methylene blue (MB) dye. A maximum adsorption capacity of 94.34 mg g<small>⁻¹</small> was obtained from the Langmuir adsorption isotherm. Kinetic properties were characterized using the pseudo-first-order, pseudo-second-order, and intra-particle diffusion models, and the pseudo-second-order model was found to be the best fit. Effectively, four cycles of adsorption–desorption for the prepared material were demonstrated through thermal desorption technique. To understand the feasibility of adsorption in different matrix conditions, MB dye-spiked samples of well water, lake water, and tap water were treated with the adsorbent material and 64.5%, 62.8%, and 53.5% removal performance, respectively, was observed. In addition, mixed solutions of heavy metals (Co<small>²⁺</small>, Ni<small>²⁺</small>, Cu<small>²⁺</small>, Zn<small>²⁺</small>, and Pb<small>²⁺</small>) were also tested for adsorption performance study of the adsorbent and 65.5–99.7% removal was observed at a sample dose of 25 g L<small>⁻¹</small>.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1579-1589"},"PeriodicalIF":2.7,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility study on fingerprinting organic and conventional mango fruits, chips, and juice using portable near-infrared spectroscopy","authors":"Francis Padi Lamptey, Ernest Teye, Sandra Ama Kaburi, Flavio Odoi-Yorke, Charles Lloyd Yeboah Amuah, Ernest Ekow Abano and Gifty Serwaa Otoo","doi":"10.1039/D4AY01813C","DOIUrl":"10.1039/D4AY01813C","url":null,"abstract":"<p >This research examined the distinction between organic and conventional mango fruits, chips, and juice using portable near-infrared (NIR) spectroscopy. A comprehensive analysis was conducted on a sample of 100 mangoes (comprising 50 organic and 50 conventional) utilising a portable NIR spectrometer that spans a wavelength range from 900 to 1700 nm. The mangoes were assessed in their entirety and their juice and chip forms. The spectral data underwent pre-processing through methodologies such as multiplicative scatter correction (MSC), standard normal variate (SNV), and derivatives to enhance the precision of the models. Principal component analysis (PCA) and various multivariate classification algorithms, including linear discriminant analysis (LDA), random forest (RF), <em>k</em>-nearest neighbors (<em>k</em>NN), and partial least squares discriminant analysis (PLSDA), were utilised to categorise the samples effectively. The findings indicated that the random forest method and specific pre-processing techniques achieved the highest classification accuracy for distinguishing organic and conventional mango products. For mango fruit and chips, it achieved 88.76% and 77.98% accuracy, respectively, when pre-processed using the second derivative, while for juice, it achieved 87.53% accuracy without pre-processing. This investigation demonstrates the efficacy of portable NIR spectroscopy as a dependable and non-invasive method for verifying organic mango products, thereby enhancing the integrity of food labelling and fostering consumer confidence.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1518-1530"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143027423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating a greener RP-HPLC method and chemical pattern recognition for the identification of Acorus calamus L. and its common adulterants in Indian markets†","authors":"Mridul Kant Chaudhary, Ankita Misra, Adarsh Tiwari, Rupali Sharma, Sanjeev Kumar Lale, Nagayya Shiddamallayya, Rabinarayan Acharya and Sharad Srivastava","doi":"10.1039/D4AY02102A","DOIUrl":"10.1039/D4AY02102A","url":null,"abstract":"<p >This work deals with the development of a greener RP-HPLC method and chemical pattern recognition for the identification of <em>Acorus calamus</em> L. collected from different natural sources and samples traded as ‘<em>Vacha</em>’ in Indian herbal drug markets. The simultaneous quantification of α- and β-asarone was performed using 0.10% orthophosphoric acid (A) and acetonitrile (B) as solvents in an isocratic manner (35 : 65 v/v) at 0.70 mL min<small>⁻¹</small>. The developed method was found to be greener using various metrics such as AES, GAPI, NEMI, AGREE, and AGREEprep than existing methods. The LC chromatogram obtained in this study showed 11 common peaks, with β-asarone (peak 10) and α-asarone (peak 11) as major markers, which were identified at an <em>R</em><small>_t</small> of 10.69 ± 0.08 and 10 ± 0.06 minutes, respectively, while their content varied from 0.02 ± 0.001 to 0.71 ± 0.07 and 2.76 ± 0.03 to 39.26 ± 0.14 μg mg<small>⁻¹</small>, respectively. Chemical pattern recognition was applied for quality evaluation of <em>Acorus</em> samples, and hierarchical cluster analysis bifurcated 17 samples into two categories. Principal component analysis integrated with orthogonal partial least squares discriminant analysis showed that the first two principal components efficiently reflect the similarity and differences among populations. Further, the components P7, P10 (β-asarone) and P11 (α-asarone) will serve as ‘landmark components’ for quality evaluation of natural and marketed samples. Results show that traded <em>Vacha</em> samples share chemical similarity with authentic <em>Acorus</em>, while common adulterants (<em>Costus speciosus</em>, <em>Typha angustifolia</em>, and <em>Alpinia galanga</em>) have entirely different profiles. The integration of HPLC fingerprint and chemical pattern recognition will provide a scientific rationale for the identification of the authentic raw drug and quality control of its adulterants/substitutes.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1477-1486"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrochemical immunosensor for Bacillus anthracis PA toxin using a polypyrrole-gold nanoparticle/multiwall carbon nanotube sensing platform and cadmium sulphide nanocrystal signal tag†","authors":"Diksha Singh, G. Raviraju, Manish Gupta, Sanjay Upadhyay, Ajay Kumar Goel and Mukesh Kumar Sharma","doi":"10.1039/D4AY01570C","DOIUrl":"10.1039/D4AY01570C","url":null,"abstract":"<p >A sandwich electrochemical immunosensor was proposed for the sensitive detection of <em>Bacillus anthracis</em> protective antigen (<em>B. anthracis</em> PA) toxin based on cadmium sulphide nanocrystals (CdS NCs) and polypyrrole-gold nanoparticle-modified multiwalled carbon nanotubes (PPy-AuNPs/MWCNTs). Herein, PPy-AuNPs/MWCNTs were used as a biocompatible and conducting matrix for immobilization of rabbit anti-PA antibody [RαPA antibody, <em>i.e.</em> capturing antibody (Ab1)] and to facilitate excellent electrical conductivity. PPy-AuNPs/MWCNTs were synthesized through a one-step chemical reaction of pyrrole and Au<small>³⁺</small> on the surface of MWCNTs. CdS NCs were employed as a label for covalent binding of monoclonal mice anti-PA antibody [MαPA antibody, <em>i.e.</em> secondary antibody (Ab2)]. When <em>B. anthracis</em> PA toxin was present in an analytical sample, the sandwich immunoassay was formed, and an electrochemical potentiometric stripping analysis (PSA) signal was generated. The PSA response produced during the detection was caused by Cd<small>²⁺</small> ions released from CdS NCs upon acid dissolution. The synergistic action of PPy, AuNPs and MWCNTs was responsible for the electrochemical signal amplification in the immunosensor. Under optimal conditions, the developed immunosensor showed a linear range from 100 pg mL<small>⁻¹</small> to 10 ng mL<small>⁻¹</small> (<em>R</em><small>²</small> = 0.992) with a detection limit of 10 pg mL<small>⁻¹</small> (S/N = 3) for <em>B. anthracis</em> PA toxin. The developed electrochemical immunosensor also exhibited excellent stability, reproducibility and good specificity. The immunosensor was applied for the analysis of human serum spiked with <em>B. anthracis</em> PA toxin with satisfactory results.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1531-1538"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing the effect of different storage times and different processes on the volatile components in Shenling Baizhu powder by HS-GC-IMS combined with multivariate statistics","authors":"Mei Wang, Lile Feng, Jinglin Li, Hui Xue, Chunli Cui, Xiaofei Zhang, Junbo Zou, Dongyan Guo and Yajun Shi","doi":"10.1039/D4AY01784F","DOIUrl":"10.1039/D4AY01784F","url":null,"abstract":"<p >Aim: this study aimed to examine the effect of different storage times (0, 7, 24, 57, and 119 days) on the volatile components of Shenling Baizhu powder across different preparation processes (Pharmacopoeia, ultra-micro pulverization–pulverization, and microparticle design methods). The findings offer insights to guide quality control measures for Shenling Baizhu powder. Methods: gas chromatography-ion mobility spectrometry (GC-IMS) was employed to ascertain the volatile components in Shenling Baizhu powder at various storage times across different preparation processes. In addition, the study compared the dynamic changes of these components under different conditions. Principal component analysis (PCA) and orthogonal partial least-squares discrimination analysis (OPLS-DA) were conducted using SIMCA-P19.0 software to analyze differences among these volatile components. Results: the volatile components identified by GC-IMS comprised 52 monomers and dimers and polymers of some substances, primarily including aldehydes, esters, terpenes, nitrogenous compounds, and ketones. Fingerprint spectra revealed significant differences in the types and quantities of volatile components in Shenling Baizhu powder at different storage times under different processes. PCA indicated negligible differences in the types of volatile components among samples prepared using different processes. An OPLS-DA model was developed to distinguish storage times and identify characteristic markers. In addition, 22 volatile components with variable importance for the projection (VIP) &gt; 1 were identified, significantly contributing to the discrimination of storage times for Shenling Baizhu powder. Overall, the content of volatile components in the samples gradually decreased with prolonged storage time. Samples prepared using the Pharmacopoeia method exhibited the most significant decline, whereas those prepared using the microparticle design method showed the least reduction in volatile components. Conclusion: HS-GC-IMS effectively captures the changing trends of volatile components in Shenling Baizhu powder across different preparation processes and storage times. This analysis provides a reference for quality control and process optimization in the production of Shenling Baizhu powder.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1546-1557"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing mass analysis of ultra-high molecular weight polystyrene: a comparative study of copper and silver salts with MALDI mass spectrometry†","authors":"Avinash A. Patil, Thị Khánh Ly Lại, Ching-Chieh Lee, Yi-Pang Chiu, Zhe-Xuan Liu, Che-Jen Lin and Wen-Ping Peng","doi":"10.1039/D4AY02077D","DOIUrl":"10.1039/D4AY02077D","url":null,"abstract":"<p >This study presents a report on the use of copper (Cu) salts in polymer mass spectrometry for samples exceeding several thousand daltons, demonstrating their efficiency and cost-effectiveness for analyzing ultra-high molecular weight (UHMW) polystyrene (PS). Using matrix-assisted laser desorption/ionization (MALDI) coupled with a home-built linear ion trap mass spectrometer (LIT-MS) under optimized conditions, polystyrene (PS) with masses up to two million daltons was successfully detected. This method using MALDI LIT-MS surpasses the previous upper detection limits observed with silver (Ag) and cesium (Cs) salts using a DCTB matrix. In the MALDI time-of-flight (TOF) mass spectrometry system, these salts were ineffective for detecting PS masses in the range from 660 kDa to 1.1 million Da, respectively (<em>Rapid Commun. Mass Spectrom.</em>, 2015, <strong>29</strong>, 1039–1046). In this study, we demonstrate for the first time that both Ag and Cu salts can successfully analyze UHMW PS samples up to 2 million Da using the <em>trans</em>-2-[3-(4-<em>tert</em>-butylphenyl)-2-methyl-2-propenylidene]-malononitrile (DCTB) matrix. However, Ag salts predominantly generate multiply charged state ion signals with no control over charge states. In contrast, Cu salts demonstrate superior versatility in modulating charge states, with copper(<small>I</small>) salts achieving higher charge states of up to +5 and copper(<small>II</small>) salts generating lower charge states of up to +3. This targeted control simplifies analysis and enhances the method's flexibility, making Cu salts particularly valuable for analyzing both individual PS samples and mixtures. Additionally, Cu salts are compatible with both DCTB and all-<em>trans</em>-retinoic acid (RA) matrices, with DCTB delivering superior performance. Comparative analysis with Ag salts further validates Cu salts as optimal cationizing reagents for UHMW PS analysis, offering a powerful tool for mass distribution measurements in polymer research and advancing analytical methods in this field.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 8","pages":" 1754-1764"},"PeriodicalIF":2.7,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Homebuilt cost-effective nitrogen blowdown evaporator†","authors":"Eamonn Clarke and Marc D. Porter","doi":"10.1039/D4AY02118E","DOIUrl":"10.1039/D4AY02118E","url":null,"abstract":"<p >Nitrogen blowdown evaporation (NBE) is a widely used technique for solvent removal. It is explicitly called for in the procedures for a wide range of analytical methods developed by regulatory and scientific agencies, and stands as a valuable tool in the sample preparation toolbox. However, commercially available equipment to perform NBE can be quite expensive, especially while working through different approaches to sample handling in the early stages of a research or analysis project. This paper details the design and construction of a homebuilt nitrogen blowdown evaporator with conventional and low-cost materials and processes, coming in at ∼20% the cost of commercial equipment. A proof-of-function experiment was carried out using the apparatus to evaporate a solution containing three per- and polyfluoroalkyl substances (PFAS). This study showed that: (1) the careful selection of materials in the design of the apparatus avoided detectable background contamination; (2) the apparatus functioned with little to no analyte loss (recoveries of 99–100% after blowdown and solvent reconstitution); and (3) evaporation times compared favorably with other designs and applications of NBE hardware. Adaptations of the apparatus for different sample containers are discussed. The ESI† includes plans and detailed instructions for the assembly and operation of the apparatus.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 8","pages":" 1930-1935"},"PeriodicalIF":2.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143062587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selective sensing of terbinafine hydrochloride using carbon-based electrodes: a green and sustainable electroanalytical method for pharmaceutical products†","authors":"Isabelle de Oliveira Borges, Adriano Rogerio Silva Lima, Antonio Gomes dos Santos Neto, Hellen Karine Stulzer and Cristiane Luisa Jost","doi":"10.1039/D4AY02151G","DOIUrl":"10.1039/D4AY02151G","url":null,"abstract":"<p >Terbinafine hydrochloride (TBF) is a broad-spectrum antifungal used to treat various dermatophyte infections affecting the skin, hair, and nails. Accurate, sensitive, and affordable analytical methods are crucial for quantifying this drug. In this study, we report on the use of carbon-based electrodes for the electrochemical determination of TBF in pharmaceutical samples, including raw materials and tablets. Notably, for the first time in the literature, we employ screen-printed carbon electrodes (SPCE) for TBF quantification. Additionally, glassy carbon electrodes (GCE) were used to explore the redox behavior of the analyte. Electrochemical performance was evaluated and compared using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Optimized conditions of supporting electrolyte and scan rate studies revealed that the oxidation of TBF involves an equal exchange of protons and electrons. For the GCE, the oxidation process was found to be irreversible, controlled by both diffusion and adsorption, while for the SPCE, it was irreversible and diffusion-controlled. Square wave voltammetry (SWV) was optimized for both electrodes to enhance sensitivity. For SPCE, the calibration curve ranged from 5 to 100 μg mL<small>⁻¹</small>, with an LOD of 1.48 μg mL<small>⁻¹</small> using a single drop of sample. The calibration curve for GCE was constructed between 2.5 and 30 μg mL<small>⁻¹</small>, with a limit of detection (LOD) of 0.072 μg mL<small>⁻¹</small>. TBF quantification was performed on raw material samples from various suppliers and tablet forms using external calibration with a recovery range within 90–110%. Analysis of the data reveals that the voltammetric method's accuracy aligns well with the chromatographic approach based on high performance liquid chromatography (HPLC). Furthermore, the proposed methodology demonstrated outstanding sustainability, achieving a score of 0.91 in Green Analytical Chemistry (GAC) criteria. Our novel approach combines high analytical efficiency with a reduced environmental impact, establishing itself as a green, cost-effective, and accurate alternative for TBF sensing.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 7","pages":" 1658-1669"},"PeriodicalIF":2.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of eight fungicides in tanned leather by liquid chromatography with mass spectrometry and with diode array spectrophotometric detection†","authors":"Francisco Javier Acevedo-Aguilar, Israel Enciso Donis, Kazimierz Wrobel, Alma Rosa Corrales Escobosa, Luis Mario Magaña Maldonado and Katarzyna Wrobel","doi":"10.1039/D4AY02152E","DOIUrl":"10.1039/D4AY02152E","url":null,"abstract":"<p >Tanned leather needs to be protected against microorganisms which is why various biocides are currently used. To evaluate the effectiveness of leather treatment and to control the concentrations of potentially harmful compounds, simple and reliable analytical procedures are required. In this work, two such procedures are proposed for the determination of eight fungicides in leather, consisting of acetonitrile extraction and liquid chromatography with electrospray ionization – mass spectrometry or diode array spectrophotometric detection (HPLC-ESI-ITMS and HPLC-DAD, respectively). According to the elution order, the analyzed compounds were: 2-bromo-2-nitropropane-1,3-diol (BNPD), methyl 1<em>H</em>-benzimidazol-2-yl-carbamate (CBZ), 2-mercaptobenzothiazole (MBT), 4-chloro-3-methylphenol (PCMC), 2-phenylphenol (OPP), 2-(thiocyanomethylthio)-benzothiazole (TCMTB), 2-<em>n</em>-octyl-4-isothiazolin-3-one (OIT), 1-[[2-(2,4-dichlorophenyl)-4-propyl-1,3-dioxolan-2-yl]methyl]-1,2,4-triazole (PRO) and 2,5-diphenyloxazole (PPO) as an internal standard. For accuracy testing, three-point standard addition was performed with the percentage recoveries in the ranges 75.0–115% and 91.9–117% for HPLC-ESI-ITMS and HPLC-DAD, respectively. The chemical composition of acetonitrile leather extract had a minor effect on the IS-normalized signal magnitude within the calibration range of each fungicide, as demonstrated by signal suppression/enhancement factors of 84.1–112% and 93.6–102%. The detection power of HPLC-ESI-ITMS was better for all compounds compared to that of HPLC-DAD; however, in real-world samples both procedures consistently detected and quantified individual fungicides. The averaged quantification difference between the two procedures was evaluated yielding <em>σ</em><small>_N</small>% values in the range 7.28–16.4%. It is concluded that the two procedures can be used interchangeably for the quantification of eight fungicides declared for use in the leather industry and that PPO is suitable as an internal standard in both.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 8","pages":" 1774-1783"},"PeriodicalIF":2.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression of concern: Electrochemical genosensor based on gold nanostars for the detection of Escherichia coli O157:H7 DNA","authors":"Nasrin Razmi, Mohammad Hasanzadeh, Magnus Willander and Omer Nur","doi":"10.1039/D5AY90010G","DOIUrl":"10.1039/D5AY90010G","url":null,"abstract":"<p >Expression of concern for ‘Electrochemical genosensor based on gold nanostars for the detection of <em>Escherichia coli</em> O157:H7 DNA’ by Nasrin Razmi <em>et al.</em>, <em>Anal. Methods</em>, 2022, <strong>14</strong>, 1562–1570, https://doi.org/10.1039/D2AY00056C.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 6","pages":" 1401-1401"},"PeriodicalIF":2.7,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ay/d5ay90010g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143021266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}