Application of Dispersive Liquid-Liquid Microextraction with Graphite Furnace Atomic Absorption Spectrometry for Determination of Trace Amounts of Zinc in Water Samples

Table 1

Heating program for determination of zinc.

Step	Temperature; (°C)	Ramp; (s)	Hold; (s)	Ar flow rate; (mL min^−1)
1	80	5	20	250
2	200	5	20	250
3	800	5	20	250
4	1800	0	4	0
5	2100	1	2	250