Talanta Open最新文献

{"title":"Screening analysis: An alternative for real-time analysis and greener microwave-assisted persulfate decomposition of flavored beverages","authors":"Rodolfo M.M. Santana ,&nbsp;Lidio Pereira Junior ,&nbsp;Marcos Diogo S. Pereira ,&nbsp;Mauro Korn","doi":"10.1016/j.talo.2023.100229","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100229","url":null,"abstract":"<div><p>The proposed procedure aims to generate information about the decomposition efficiency of organic matter before the instrumental determination of elements and real-time decision-making. In the presence of organic compounds samples, the irradiation time was consistently higher (at least 20 s or more) than that observed for the appearance of MnO₄^– in organic matter-free solutions (10±1 s, <em>n</em> = 6). Moreover, RCC values ≤14% were determined for all solutions independent of the target compound observed. Total carbon was determined in samples before and after persulfate decomposition, with a 95% reduction in the carbon content, except for grape-flavored waters (RCC = 85%). The microwave-assisted S₂O₈²⁻/Mn²⁺ system allowed a fast, clean and effortless approach leading to material, energy, and time-saving method for mineralizing beverages.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100229"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1821929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multielemental analysis of oils and animal fat by using deep eutectic solvents assisted by an aerosol phase extraction procedure","authors":"Ana Torres ,&nbsp;Ismael Romero ,&nbsp;Raquel Sánchez ,&nbsp;Ana Beltrán ,&nbsp;Gabriela Guillena ,&nbsp;José-Luis Todolí","doi":"10.1016/j.talo.2023.100234","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100234","url":null,"abstract":"<div><p>In the present study, thirteen elements (Ag, Al, Ba, Cd, Cr, Cu, Fe, K, Li, Mg, Mn, Ni, Pb) have been extracted from used cooking oils, olive oils and animal fat. Either inductively coupled plasma optical emission spectrometry (ICP-OES) or tandem mass spectrometry (ICP-MS/MS) have been chosen as detection techniques. Due to the difficulty of directly introducing highly viscous organic samples into the spectrometer, a fast dispersive liquid – liquid aerosol phase extraction (DLLAPE) method has been selected to isolate the analytes from the sample matrix. The DLLAPE is based on the generation of an aerosol from the extracting phase with the help of a pneumatic nebulizer. This high velocity aerosol impacts and penetrates in the liquid sample. Consequently, the liquid – liquid exchange surface area becomes high, thus leading to high extraction yields. A hydrophilic deep eutectic solvent (DES) consisting of choline chloride and ethylene glycol (1:2 mass ratio) has been selected as the extracting solvent. Prior to undertaking the experiments, the extraction method has been evaluated in terms of precision under suitable conditions. In comparison with conventional methods based on sample digestion, sample dilution and shot analysis or extraction assisted by vortex agitation, the DLLAPE shows several advantages, because it is faster, and it provides lower limits of detection than the reference methodologies. The procedural limits of quantification for the determined elements with the DLLAPE in ICP-OES were 0.046 (Ag), 0.396 (Al), 0.013 (Cd), 0.033 (Cr), 0.040 (Cu), 0.20 (Fe), 0.026 (K), 0.026 (Li), 0.33 (Mg), 0.013 (Mn), 2.64 (Ni) and 0.53 (Pb) mg kg⁻¹. Meanwhile, pLOQ in ICP-MS/MS lowered by roughly one order of magnitude. The accuracy of the aerosol phase extraction method has been evaluated through the determination of the recoveries for four representative analytes (Ca, Cu, Mg and Ni) from spiked real samples. For these elements, recovery has taken values of (100 ± 20)%. Moreover, a comparison of the multielemental concentration obtained with conventional methods (<em>c.a.</em>, sample dilution and shot ICP analysis and liquid-liquid extraction using a vortex agitator) against that measured with the DLLAPE has been carried out. Multiemelemental concentrations have been obtained for real samples and the found levels have been similar to those encountered in previously published works.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100234"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1821931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzes of β-lactam antibiotics by direct injection of environmental water samples into a functionalized graphene oxide-silica packed capillary extraction column online coupled to liquid chromatography tandem mass spectrometry","authors":"Edvaldo V.S. Maciel ,&nbsp;Deyber A. Vargas-Medina,&nbsp;Fernando M. Lancas","doi":"10.1016/j.talo.2023.100185","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100185","url":null,"abstract":"<div><p>An environmentally friendly and high-throughput method for monitoring β-lactam antibiotics in environmental water samples is presented. In this study, an in-lab synthesized graphene oxide supported onto aminopropyl silica (GO@SiO₂) sorbent was packed inside a fused silica capillary to produce a miniaturized extraction column. The main goal was to develop a greener analytical method that requires low amounts of chemicals to be executed and, consequently, generates a reduced volume of toxic waste. To achieve that, the GO@SiO₂ extraction column was online coupled with a LC-MS/MS instrument to carry out an automated and miniaturized sample preparation step before analytical quantification. A chemometric optimization was performed considering the variables possibly affecting the analytical performance: sample loading flow, sample loading time, and temperature of analysis. Under optimized conditions, the method reported good analysis times (12 min) and consumed fewer reagents compared to other publications on the same topic. Important validation parameters were evaluated accordingly with the ICH Q2(R1) validation guideline. The method showed appropriate linearity between 1 – 100 μg/L (R² &gt; 0.99), as well as LODs (S/<em>N</em> = 3) in the range of 0.2 – 0.3 μg/L. Accuracy, intra- and inter-day precision (RSD%) were in acceptable ranges between 82.3 – 107.1%, and 0.8 – 20.6%, respectively. Out of ten collected environmental water samples, two reported the presence of cefalexin. Ultimately, the method was demonstrated to be fast, environmentally friendly, and reliable for monitoring the β-lactams. Therefore, it represents an excellent alternative to still widely-used and non-miniaturized methods based on time-consuming sample preparation.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100185"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2643007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Direct determination of chlorine in the glycerin by-product of biodiesel production: A green approach using energy dispersive X-ray fluorescence spectrometry","authors":"Marlin J. Pedrozo-Peñafiel,&nbsp;Adriana Doyle,&nbsp;Andréa S. Vieira,&nbsp;Joseany M.S. Almeida,&nbsp;Ricardo Q. Aucélio","doi":"10.1016/j.talo.2023.100214","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100214","url":null,"abstract":"<div><p>Glycerin, by-product of biodiesel, is produced in large amounts and it contains several contaminants, including chorine (due to the neutralization stage using HCl). When using this glycerin as biomass to produce energy, the presence of alkaline chlorides may lead to the formation of corrosive fumes at high temperatures. In this sense, the knowledge of chloride content is important in order to decide the fate of this raw by-product. The direct spectrometric determination of chlorine is an analytical challenge. In this context, energy-dispersive X-ray fluorescence spectrometry provided direct and accurate determination, relying on external calibration based on sample dilution and matrix matching with mixture of pure glycerin and water and using NaCl as the analytical (primary) standard. Method limit of quantification was 50 mg kg⁻¹, with analytical curve up to 1000 mg kg⁻¹ (R² = 0.9992), and repeatability below 5% were found to be adequate for such application in such highly salty samples (original concentrations at mg g⁻¹). In addition to sample directly analysis, without any previous treatment but homogenization and dilution, not requiring chemical derivatization and the not using of toxic reagents are in consonance to the analytical green chemistry requirements, allowing direct analysis of sample with no chemical derivatization with toxic reagents.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100214"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1631708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guidelines to build PLS-DA chemometric classification models using a GC-IMS method: Dry-cured ham as a case of study","authors":"Andrés Martín-Gómez ,&nbsp;Pablo Rodríguez-Hernández ,&nbsp;María José Cardador ,&nbsp;Belén Vega-Márquez ,&nbsp;Vicente Rodríguez-Estévez ,&nbsp;Lourdes Arce","doi":"10.1016/j.talo.2022.100175","DOIUrl":"https://doi.org/10.1016/j.talo.2022.100175","url":null,"abstract":"<div><p>The number of representative samples to build a calibration model plays a major role in the success of chemometric models for class discrimination; therefore, knowing which samples should be used for the calibration of prediction models is essential. The aim of this work is to design a basic guideline for the training of partial least squares discriminant analysis (PLS-DA) models to classify complex samples analysed by Gas Chromatography (GC) coupled to Ion Mobility Spectrometry (IMS) using dry-cured Iberian ham as an example. The effect of the number, proportion and class of samples for training and validation and the use of two data types (spectral fingerprint or pre-selected markers) has been assessed by analysing with GC-IMS nearly 1000 dry-cured Iberian ham samples obtained from 7 different curing plants. Subsequently, these were classified with PLS-DA according to the pig's feeding regime (acorn-fed vs. feed-fed) and it has been demonstrated that 450 out of 997 samples are enough for model training to achieve a maximum average prediction accuracy rate. Furthermore, the use of pre-selected GC-IMS markers provides slightly better prediction results than the use of the complete spectral fingerprint. In summary, these results represent a tentative guide for the classification of samples in an industrial setting using GC-IMS and PLS-DA. This methodology would allow authorities and producers to ensure the quality of the agri-food products put on the market as is proven in this study.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100175"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1794562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon-based biosensors: Next-generation diagnostic tool for target-specific detection of SARS-CoV-2 (COVID-19)","authors":"Shivam Mishra ,&nbsp;Bari Aamna ,&nbsp;Sagarika Parida ,&nbsp;Aritra Kumar Dan","doi":"10.1016/j.talo.2023.100218","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100218","url":null,"abstract":"<div><p>Severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) was declared a global pandemic in 2020. Having rapidly spread around the globe, with the emergence of new variants, there is a crucial need to develop diagnostic kits for its rapid detection. Since it validated accuracy and reliability, the reverse transcription polymerase chain reaction (RT-PCR) test has been declared the gold standard for disease detection. However, despite its reliability, the requirement of specialized facilities, reagents, and duration of a PCR run limits its usage for rapid detection. There is thus a continuous increase in the design and development of rapid, point-of-care (PoC), and cost-effective diagnostic kits. In this review, we discuss the potential of carbon-based biosensors for target-specific detection of coronavirus disease 19 (COVID-19) and present an overview of investigation within the timeframe of the last four years (2019–2022), which have developed novel platforms using carbon nanomaterial-based approaches for viral detection. The approaches discussed offer rapid, accurate, and cost-effective strategies for COVID-19 detection for healthcare personnel and research workers.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100218"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10125215/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1821927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mirror-Stamping: A new TLC-SERS method for color authentication","authors":"Haochen Dai ,&nbsp;Lili He","doi":"10.1016/j.talo.2023.100237","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100237","url":null,"abstract":"<div><p>Adulteration of natural colorants with artificial ones compromises the authenticity, quality, and safety of food products. It is significant for food companies to check the raw colorant ingredients to avoid potential adulteration. Combining thin-layer chromatography (TLC) and surface-enhanced Raman spectroscopy (SERS) is a promising colorant separation and detection approach. Herein, we developed a novel and simple TLC-SERS approach based on silver mirror-stamping, which was achieved by pressing a layer of aggregated silver nanoparticles on top of the target analytes on the developed TLC chip. The performance of the stamping method was evaluated on the separation and signal enhancement of an adulterated saffron model matrix (saffron and red 40) as compared to the other two methods (mirror-first and mirror-last methods). The results demonstrated that the mirror-stamping method achieved optimal separation performance with strong SERS signals. This can be attributed to the reduced sample disruption and dilution. Therefore, the mirror-stamping approach demonstrates great potential for use in TLC-SERS analysis to rapidly and accurately determine natural colorant authenticity and quality.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100237"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1821930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robust off-grid analyser for autonomous remote in-situ monitoring of nitrate and nitrite in water","authors":"Simon Bluett ,&nbsp;Paul O'Callaghan ,&nbsp;Brett Paull ,&nbsp;Eoin Murray","doi":"10.1016/j.talo.2022.100173","DOIUrl":"https://doi.org/10.1016/j.talo.2022.100173","url":null,"abstract":"<div><p>An off-grid, internet-of-things (IoT) connected ion chromatography analyser was developed for the real-time automated measurement of nitrate and nitrite levels in remote surface water applications. The system used KOH eluent with an AG15 guard column to achieve anion separation, in combination with a selective 235 nm UV-LED detector. A self-cleaning 3D printed <em>Sediment Trap</em> was developed to filter the sample before analysis, preventing silt and sediment from causing blockages and facilitating robust performance during long-term deployments. Laboratory tests showed reductions of up to 91% of total suspended solids and 61% of turbidity within the sample after a settling time of 5 min. In controlled temperature tests (7 to 40 °C), the average error in the detected concentration levels remained below 5%, indicating robust and repeatable performance of the analyser in varying environmental conditions. Two automated <em>in-situ</em> analysers were deployed at remote locations in West Cork, Ireland, for a period of one month. The deployments successfully demonstrated the capability of the system to detect transient pollution events, facilitating improved water-quality management of remote catchments. The analysers were monitored in real-time using a cellular IoT module and cloud-based dashboard.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100173"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1822007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of limit of detection in Taylor dispersion analysis: Application to the size determination of vaccine antigens","authors":"Camille Malburet ,&nbsp;Michel Martin ,&nbsp;Laurent Leclercq ,&nbsp;Jean-François Cotte ,&nbsp;Jérôme Thiebaud ,&nbsp;Jean-Philippe Biron ,&nbsp;Joseph Chamieh ,&nbsp;Hervé Cottet","doi":"10.1016/j.talo.2023.100209","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100209","url":null,"abstract":"<div><p>The development of a new vaccine requires the precise characterization of all the physicochemical parameters of the vaccine antigens, which are the molecules that induce the immune response. Taylor dispersion analysis (TDA) is a promising alternative technique for the determination of diffusion coefficients and hydrodynamic radii of proteins, macromolecules and nanoparticles. In this work, TDA was used to determine the hydrodynamic radius distribution and its average value of four antigens: diphtheria toxoid (DT), tetanus toxoid (TT), hepatitis B surface antigen (HBsAg) and polyribosyl-ribitol phosphate conjugated to tetanus toxoid (PRP-T). The robustness of the results obtained was investigated on bare fused silica capillary and hydroxypropylcellulose coated capillary. The impact of operational parameters on the limit of detection (LOD) and limit of quantification (LOQ) were studied from both theoretical and experimental points of view. The influence of the diameter and the length of the capillary on the LOD and LOQ were studied as well as the impact of the mobilization pressure. General guidelines for the choice of the initial operating conditions are given for the development of future TDA methods.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100209"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3201166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determination of opiates in urine samples using a composite of covalent organic framework and polypyrrole as a sorbent for microextraction in a packed syringe combined with HPLC/UV","authors":"Fatemeh Zanganeh ,&nbsp;Yadollah Yamini ,&nbsp;Mohammad Mahdi Khataei ,&nbsp;Mahboube Shirani","doi":"10.1016/j.talo.2023.100183","DOIUrl":"https://doi.org/10.1016/j.talo.2023.100183","url":null,"abstract":"<div><p>This study aimed to develop microextraction in a packed syringe (MEPS) method for the determination of the three opiates in urine samples. Covalent organic framework-polypyrrole- cetyltrimethylammonium bromide <strong>(</strong>COF-PPy-CTAB) nanocomposite, as an appropriate and highly efficient adsorbent, was synthesized and applied to the MEPS process. The analytes were separated and extracted on the solid phase surface of the adsorbent through π stacking, hydrophobic, and host-guest interaction and then eluted by a desorbing solvent. After synthesizing the composite and using it in the syringe as a substrate for analyte adsorption, the parameters affecting the extraction of the analytes were optimized and the calibration curve was obtained according to the optimum conditions. The results were linear in the concentration range of 0.5–1000 μg L ⁻ ¹ with a coefficient of determination greater than 0.9945. The limits of detection and quantification were obtained in the range of (0.1–1.0) and (0.5–5.0) μg L^‒1, respectively. The precision of the work was obtained for a syringe in a day and between days and also syringe to syringe in the range of 4.4–6.1%, 6.5–8.1%, and 7.8–10.1%, respectively. The preconcentration factors of 17, 20, and 16 were obtained for codeine, papaverine, and naltrexone, respectively. Relative recoveries of the drugs from urine samples were in acceptable range of 94.4–100.6% for codeine, 99.3–103.1% for papaverine and 95.0–98.9% for naltrexone.</p></div>","PeriodicalId":436,"journal":{"name":"Talanta Open","volume":"7 ","pages":"Article 100183"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2643005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}