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precipitation. The sensor exhibited exceptional selectivity, a detection limit in the sub-nanomolar range, and strong anti-interference performance from competing metal ions and oxyanions. Environmental sample testing further validated its applicability, showing high recovery rates (90.3-109.8 %). The results showed excellent agreement with the inductively coupled plasma mass spectrometry (ICP-MS) measurements as a conventional Hg(II) detection method. This work advances DNA-enzyme-mediated electrochemical sensing by integrating molecular recognition with an intrinsic detoxification mechanism. The findings provided a promising foundation for the next-generation bioelectronic platforms, enabling real-time monitoring of both inorganic mercury and selenate and a potential mercury removal method.
Yu et al. (Wed,) studied this question.