Dual-target electrochemical DNA sensor for detection of Pb2+ and Hg2+ simultaneously by exonuclease I–assisted recycling signal amplification

A novel electrochemical sensing method based on an amino-functionalized MXene for the rapid and selective detection of Hg2+

“…2,4–9 As such, detecting the presence of Hg 2+ in water is of vital importance to both environmental preservation and human wellbeing. Currently, the most widely employed techniques for detecting Hg 2+ include inductively coupled plasma mass spectrometry, 10 atomic fluorescence spectrometry, 11 atomic absorption spectroscopy, 12 atomic emission spectrometry, 13 fluorescence, 14 electrochemical methods, 15 etc. Although effective, these approaches generally require costly instrumentation, intricate sample preparation, and stringent detection parameters.…”

Development of a Novel H-Shaped Electrochemical Aptasensor for Detection of Hg2+ Based on Graphene Aerogels–Au Nanoparticles Composite

“…The aptasensor showed high stability, sensitivity, and good specificity, with a detection limit of 0.19 fM. Wang et al [21] devised an innovative dual-target electrochemical biosensor with high sensitivity for the detection of Pb 2+ or Hg 2+ in water. In the presence of Hg 2+ , it forms a complex structure known as thymidine-Hg 2+ -thymidine (T-Hg 2+ -T) on the aptamer chain, leading to signal attenuation.…”