Preconcentration of Trace Amounts of Pb(II) Ions without Any Chelating Agent by Using Magnetic Iron Oxide Nanoparticles prior to ETAAS Determination

Table 1

Operating parameters for ETAAS determination of lead.

Heating step	Temperature (°C)	Ramp (°C min^−1)	Hold (s)	Argon flow rate (mL min^−1)
Drying	120	10	20	250
Pyrolysis	400	10	40	250
Atomization	1200	0	3	0
Cleaning	2000	1	2	250