Journal
FOOD CHEMISTRY
Volume 311, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.125889
Keywords
Melamine; DNA; Hydrocolloid; Fluorescent probe
Funding
- National Science Foundation of China [21571085]
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Simple and sensitive methods are required for the detection of melamine since melamine is harmful to human health. To detect the content of melamine and metal-melamine species in milk products, a new luminescent DNA silver hydrocolloid (AgNC53) was synthesized using a modified C3A-rich aptamer as the template. The emission of AgNC53 at 617 nm is sensitive to both melamine-Cu(II) and melamine, while almost no response to the free Cu (II) ion was detected. Moreover, AgNC53 is used to detect precisely the content of melamine in milk with a detection limit as low as 2.7 x 10(-8) M. Thus, the AgNC53-based fluorescence method is a label-free fluorescence technology that can be used for the determination of melamine or the melamine-Cu(II) complex in milk products.
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