Safeguarding Public Health: Advanced Detection of Food Adulteration Using Nanoparticle-Based Sensors

Critical Reviews in Analytical Chemistry, Год журнала: 2024, Номер unknown, С. 1 - 21

Опубликована: Сен. 13, 2024

Food adulteration, whether intentional or accidental, poses a significant public health risk. Traditional detection methods often lack the precision required to detect subtle adulterants that can be harmful. Although chromatographic and spectrometric techniques are effective, their high cost complexity have limited widespread use. To explore validate application of nanoparticle-based sensors for enhancing food focusing on specificity, sensitivity, practical utility in development resilient safety systems. This study integrates forensic principles with advanced nanomaterials create robust framework. Techniques include assays designed improve specificity sensitivity. In addition, sensor-based technologies, including electronic noses tongues, been assessed capacity mimic enhance human sensory detection, offering objective reliable results. The use nanomaterials, functionalized nanoparticles, has significantly improved trace amounts adulterants. Nanoparticle-based demonstrate superior performance terms speed, selectivity compared traditional methods. Moreover, integration these into protocols shows promise real-time onsite adulteration. represent cutting-edge approach detecting offer enhanced scalability. By integrating nanotechnology, this framework advances more food-safety Future research should focus optimizing technologies adapting them address emerging adulteration threats.

Язык: Английский

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Improved neural networks for the classification of microplastics via inferior quality Raman spectra

Talanta, Год журнала: 2025, Номер 289, С. 127756 - 127756

Опубликована: Фев. 18, 2025

Язык: Английский

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High-Precision Biochemical Sensing with Resonant Monocrystalline Plasmonic Ag Microcubes in the Mid-Infrared Spectrum

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 27, 2025

Infrared (IR) spectroscopic fingerprinting is a powerful analytical tool for characterizing molecular compositions across biological, environmental, and industrial samples through their specific vibrational modes. Specifically, when the sample characterized in resonant plasmonic cavities, as surface-enhanced mid-IR absorption spectroscopy (SEIRAS), highly sensitive detection can be achieved. However, current SEIRAS techniques rely on nanofabricated subwavelength antennas, limited by low-throughput lithographic processes, lacking scalability to address broad biochemical sensing applications. To this, we present an on-resonance method utilizing silver (Ag) cubic microparticles (Ag-CMPs) with robust resonances. These monocrystalline Ag-CMPs, featuring sharp edges vertices, are synthesized via high-throughput, wet-chemical process. When dispersed gold mirror substrates aluminum oxide spacer, Ag-CMPs support enhanced near-field light-matter interactions nanocavities while enabling far-field imaging-based optical interrogation due strong extinction cross sections. We demonstrate of polydimethylsiloxane (PDMS) bovine serum albumin (BSA) monolayers simply probing individual enabled amplification characteristic absorptions. Furthermore, our single-particle (SP-SEIRAS) approach effectively analyzes complex human peritoneal fluid (PF) samples, eliminating challenges standard bulk measurements. This scalable efficient SP-SEIRAS addresses key limitations IR techniques, unlocking possibilities widespread adoption real-world

Язык: Английский

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Elemental analysis by neutron activation analysis and synchrotron x-ray fluorescence microscopy of ocean plastics ingested by pelagic seabirds

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138528 - 138528

Опубликована: Май 1, 2025

We report the combined use of Neutron Activation Analysis (NAA) for bulk measurement marine plastics ingested by wildlife, with a more detailed analysis individual at different stages degradation using synchrotron X-ray fluorescence microscopy (S-XFM). On average, Sable Shearwaters (n = 9) 4.16 ± 4.62 g (50 35 items), most which were high-density polyethylene (47.4 %) and polypropylene (42.6 as determined attenuated total reflectance Fourier transform infrared spectroscopy. Using NAA, abundant elements (Ti, Zn, Cd, Cu, Cr, Sr) those commonly associated plastic additives that confer UVC resistance, mechanical properties, or colouration. S-XFM revealed visually structurally near identical may not only contain chemical elements, but internal spatial distribution these can vary substantially. also detected presence lead (Pb) indicate prior recycling history feed stock. A consistent finding was accumulation iron (Fe) bromine (Br) surface degrading plastics, attributable to biofilm formation. Our observations highlight bird populations ingesting are exposed an unpredictable profile degradation-dependent release rate is unknown in acidic enzymatically-active stomach environment. Based on variability their elemental content, we propose regard 'mixed waste'. speculate generally could be doped complex 'fingerprints' purpose traceability establishment unbroken chain custody.

Язык: Английский

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Inhibition mechanisms of ice crystal recrystallization by polysaccharides: a comparative analysis of molecular structures and cryoprotective properties

Journal of the Science of Food and Agriculture, Год журнала: 2025, Номер unknown

Опубликована: Июнь 3, 2025

Abstract BACKGROUND Polysaccharides are increasingly being recognized as promising food‐grade cryoprotectants due to their broad availability and health benefits. However, practical application is hindered by limited ice recrystallization inhibition (IRI) activity. The purpose of this study was compare the IRI activity several natural polysaccharides. RESULTS We conducted a comparative analysis molecular structures cryoprotective properties using various physicochemical structural characterization techniques. Among polysaccharides studied, locust bean gum exhibited highest at 10 mg mL −1 , with mean largest grain size values 51.5 μm. Inulin, citrus peel pectin, demonstrated gradually increasing concentration solution increased. This likely enhanced formation intermolecular networks that raised viscosity created physical barriers crystal growth. correlation revealed significant negative between 1 50% relative humidity. Melting temperature significantly negatively correlated OH, CO, COC, further confirming ability inhibit growth related specific functional groups, humidity, melting temperature. CONCLUSION findings offer insights into potential serve effective cryoprotectants, improving stability texture frozen foods. © 2025 Society Chemical Industry.

Язык: Английский

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