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. 2022 May 21;839:156164. doi: 10.1016/j.scitotenv.2022.156164

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Fig. 2 — (A) Fluorescence spectra changes of probe BTH (5 μM) before and after adding HOCl (0–30 μM) under the PBS solution (10 mM, pH 7.4) at 25 °C. (B) The relationship between the fluorescence intensity at 553 nm of BTH (5 μM) and the concentration of added HOCl (0–1 μM). λ_ex = 468 nm.