Abstract
Nitrogen-doped carbon dots(N-CDs) were hydrothermally synthesized by folic acid, which revealed excited wavelength-dependent blue emission and the specific recognition of Hg ions by fluorescence quenching. A wide range response and a fitted linear relationship for Hg ions detection were established to show that these blue-emission N-CDs achieved a satisfying Hg ions detection in Chinese traditional herb, Rannasangpei(RSNP). The results from the N-CDs FL quenching gave the similar outcomes with those from ICP-OES measurement, which exhibited the possibility of the simple FL method of Hg ions detection by N-CDs in Chinese traditional herbs.
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