Abstract：
:Carbon dots (CDs) have been a new class of fascinating carbon-based fluorescent nanomaterials. In the present work, new N-doped CDs with highly crystalline graphite structures are prepared from renewable precursors, chitosan and tartaric acid, and are well characterized. The prepared CDs are applied as a biocompatible fluorescent sensor for the sequential detection of Fe3+ and AA. Among various transition metal ions, Fe3+ can selectively quench the fluorescence of CDs. Upon the further addition of AA, the quenched fluorescence of CDs is then restored as Fe3+ is reduced to Fe2+ by AA, which can be utilized for the fluorescent determination of AA. A good linear relationship in the range of 0-150 μM of AA concentration is established with a low detection limit of 0.02 µM. Moreover, the practical applications of this fluorescent sensing method in measurement of AA in food samples are successfully realized with satisfactory results.
journal_name
Food Chemjournal_title
Food chemistryauthors
Lv X,Man H,Dong L,Huang J,Wang Xdoi
10.1016/j.foodchem.2020.126935subject
Has Abstractpub_date
2020-10-01 00:00:00pages
126935eissn
0308-8146issn
1873-7072pii
S0308-8146(20)30797-4journal_volume
326pub_type
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