Solidified Floating Organic Drop Microextraction for the Detection of Trace Amount of Lead in Various Samples by Electrothermal Atomic Absorption Spectrometry

Table 1

The temperature program of graphite furnace atomizer.

Step	Start (°C)	End (°C)	Ramp time (s)	Hold time (s)	Ar flow rate (mL min^−1)
Drying	80	140	40	2	250
Ashing	500	500	20	2	250
Atomizing	1400	1400	0	5	0
Clean	2200	2200	0	4	250