A ratiometric fluorescent sensor based on dual-emitting carbon dots for the rapid detection of sulfite
[Display omitted] •A ratiometric sensor for HSO3− was developed using a carbon dots-Cr (Ⅵ) composite.•The sensor-based method for HSO3− exhibited good linearity over a wide range.•SO2 residues in medicine-food homology materials were detected with good accuracy.•Portable test tube for SO2 residues w...
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Veröffentlicht in: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2025-01, Vol.325, p.125132, Article 125132 |
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Sprache: | eng |
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•A ratiometric sensor for HSO3− was developed using a carbon dots-Cr (Ⅵ) composite.•The sensor-based method for HSO3− exhibited good linearity over a wide range.•SO2 residues in medicine-food homology materials were detected with good accuracy.•Portable test tube for SO2 residues was prepared and applied in real samples.
Sulfur dioxide (SO2) derivatives are typically employed as antioxidants in food and pharmaceutical processing. However, excessive sulfite intake could trigger serious health problems. Hence, it is urgent to establish a rapid and effective system for monitoring SO2. This study adopted a one-step hydrothermal method to synthesize dual-emitting nitrogen-doped carbon quantum dots (CECDs) and developed a ratiometric sensor for sulfite using CECDs-Cr (VI) composites. The emission intensity ratio (I440/I500) of the CECDs-Cr (VI) composites increased considerably with the addition of HSO3−. A method based on the ratiometric sensor was established for SO2 derivatives with advanced efficiency and excellent linearity over a broad concentration range of 0–500 μM (R2 = 0.9946). Four medicine-food homology materials (MFHMs) fumigated with sulfur have been accurately detected using this approach. Furthermore, a portable test tube was prepared to achieve rapid and semi-quantitative detection of SO2 residues and applied to real samples. This work presents an effective approach to develop a rapid on-site detection platform for sulfite residues in food and pharmaceuticals. |
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ISSN: | 1386-1425 1873-3557 |
DOI: | 10.1016/j.saa.2024.125132 |