I would like to know why thymine is used for mercury detection? Is it any chemical bond link or something else? and can it be interference for other metals ?
I refer you to Tian, et al. (2015)*, which shows that the mercury-to-thymine bond produces chemiluminescence, which means that the mercury can be detected by the light emitted when it binds with thymine. The light would be more intense with more mercury (Hg2+), so it forms the basis for quantitative measurement as well as detection at a low concentration. I hope this helps. If not, please feel free to contact me again.
With best regards,
Bob Michaels
*Tian, Yang; Yue Wang, Yan Xu, Yang Liu, Di Li, Chunhai Fan. A highly sensitive chemiluminescence sensor for detecting mercury (II) ions: a combination of Exonuclease III-aided signal amplification and graphene oxide-assisted background reduction. Science China Chemistry, 58:514-8, March 2015.
Because of its elective complexation to form T-Hg-T complex or metallo-DNA duplex.
See M. Pandeeswar, S. P. Senanayak, and T. Govindaraju, ACS Appl. Mater. Interfaces,2016, 8, 30362.
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