Determination of As, Cd, and Pb in Tap Water and Bottled Water Samples by Using Optimized GFAAS System with Pd-Mg and Ni as Matrix Modifiers

Table 3

Analytical figures of merit for As, Cd, and Pb.

	Arsenic	Cadmium	Lead
Limit of detection (LOD), ng/mL	2.0	0.036	0.25
Limit of quantitation (LOQ), ng/mL	6.6	0.12	0.83
Linear range, ng/mL	5.0–60	0.25–2.0	1.0–8.0
𝑅^2	0.9991	0.9985	0.9981
Equation	y = 0.0059x + 0.0028	y = 0.2414x + 0.0705	y = 0.0408x + 0.0176