3-Mercaptopropyltrimethoxysilane Modified Diatomite: Preparation and Application for Voltammetric Determination of Lead (II) and Cadmium (II)

Table 4

Comparison of GCE modified with MPTMS-diatomite with other GCEs modified with other nanoparticles.

Electrode	Method	Linear range (ppb)	LOD (ppb)	References
MgO–Nafion/GCE	DP-ASV, ABS pH = 5.0	Cd(II): 1.1–23.6; Pb(II): 2.1–414	—	[22]
BiNPs/GCE	DP-ASV, ABS pH = 4.5	5.0–60.0	Cd(II): 0.4; Pb(II): 0.8	[25]
AuNPs/GCE	DP-ASV, ABS pH = 5.0	—	Cd(II): 20.7; Pb(II): 11.2	[26]
Padpa/Ru/GCE	DP-ASV, HCl 0,1 M	—	Cd(II): 21.7; Pb(II): 9.8	[27]
Diatomite-MPTMS/GCE	DP-ASV; ABS; pH = 4.5	Cd(II): 20–300; Pb(II): 20–150	Cd(II): 15.9; Pb(II): 6.9	This work

Glassy carbon electrode (GCE); bismuth nanoparticles (BiNPs); gold nanoparticles (AuNPs); tris(2,2′-bipyridyl)Ru(II) (Padpa/Ru).