AI Article Synopsis
- A new technique was developed to detect aluminum (Al) in milk and biological samples, which can also identify the antibiotic tetracycline (TC) without interference from other metal ions.
- The method has a low limit of detection (LOD) of 0.00022 mM for Al, with a strong correlation (r = 0.9439) indicated via fluorescence intensity analysis.
- Additionally, carbon dots (CDs) derived from TC can detect Al with an LOD of 0.00050 mM and a slightly lower correlation (r = 0.9404), and this detection was validated in both milk and living yeast cells.
Article Abstract
We developed a technique that detects Al in milk/bio-samples, and reversibly applied to recognize tetracycline (TC) in milk, enhancing the fluorescence intensity without interference from other cations (Cd, Ni, Co, Sr, Mg, Fe, K, Sm, Ag, Na, Ba, Cr, Zn and Mn); the limit of detection (LOD) is found to be 0.00022 mM with r = 0.9439. The detection of Al is tested in milk as well as in living cells (Saccharomyces cerevisiae and Debaryomyces spp.) by TC or by its quantum dots. This is consistent with the molecular orbital, revealing that the lowering of the energy of HOMO (Highly Occupied Molecular Orbital) discourages the electron transfer from HOMO of fluorophore to HOMO of excited states of Al-complex that increases the fluorescent intensity. Interestingly, carbon dots (CDs) generated from TC also recognize Al as its LOD is as low as to 0.00050 mM with r of 0.9404.
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| http://dx.doi.org/10.1016/j.foodchem.2018.11.086 | DOI Listing |
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