Fig. 10. (a) Fluorescence response of (A) 10 μL GSH-CDs, (B) other ionic mixture (Ag⁺, K⁺, Ca²⁺, Cu²⁺, Ni²⁺, Ba²⁺, Pb²⁺, Hg²⁺, Cd²⁺, Co²⁺, Fe²⁺, Fe³⁺, As³⁺, Cl⁻ of 25 nM, and ClO⁻, Br⁻, I⁻, SCN⁻, NO₂⁻, PO₄³⁻, H₂PO₄⁻, SO₄²⁻, ONOO⁻, ·OH, and O₂˙⁻ of 100 μM) without As³⁺ and ClO⁻ ions, (C) other ionic mixtures with 25 nM of As³⁺ and without ClO⁻ ions and (D) other ionic mixtures with 100 μM of ClO⁻ ions of 100 μM and without As³⁺. (b) Is a similar analysis of (a), followed with a higher concentration of other competitive cations (30 nM), and anions (150 μM).