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. 2021 Sep 15;429:132472. doi: 10.1016/j.cej.2021.132472

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Fig. 4 — Stability and selectivity of the pH-induced regenerative biosensor. (A) The ECL signal at 460 nm and (B) the ECL signal at 620 nm by scanning 10 times after treating 1 pM SARS-CoV-2 RdRp gene. (C) Selectivity of the pH-induced regenerative biosensor. (D) Reproducibility of the pH-induced regenerative biosensor.