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 2

Temperature program used in the determination of As.

	Temperature, °C			Ramp, s (N2, L/min)			Hold, s (N2, L/min)
	As	Cd	Pb	As	Cd	Pb
Drying	140	130	120	15 (0.2)	25 (0.2)	20 (0.2)	15 (0.2)	10 (0.2)	10 (0.2)
Ashing	600	280	380	10 (0.2)	10 (0.2)	10 (0.2)	10 (0.2), 1.5 (0)	5.0 (0.2), 1.0 (0)	10.0 (0.2), 1.0 (0)
Atomization	2300	1800	2000	0.9 (0)	0.8 (0)	0.9 (0)	1.0 (0)	—	—
Cleaning	2600	2500	2500	1.0 (1.0)	2.0 (1.0)	2.0 (1.0)	3.0 (1.0)	—	—