Figure 22.

SEM image of (A) GAs, TEM image of (B) UiO-66-NH₂, (C) XRD spectra, (D) N₂ adsorption-desorption isotherm of the GAs-UiO-66-NH₂, (E) DPSV response of the GAs-UiO-66-NH₂ altered GCE after adding diverse concentrations of Cd²⁺, Pb²⁺, Cu²⁺, and Hg²⁺ in acetate buffer solution (0.2 M, pH 5.0, DPSV response of the GA-UiO-66-NH₂ altered GCE for specific analysis of (I) Cd²⁺, (F) Cu²⁺, (G) Pb²⁺, and (H) Hg²⁺ over a concentration range of 0.06−3.0 μM, 0.01−4.0 μM, 0.1−3.5 μM, and 0.005−3.0 μM, respectively. Reproduced with the permission from [198].