Comparative Study on Two Pretreatment Processes for Chemical Phase Analysis of Gold in Geological Samples by Atomic Absorption Spectrometry

Table 2

Heating program for graphite furnace.

Step	Temperature (°C)	Heating time (s)	Holding time (s)	Internal gas flow (mL/min)
Dry	110	10	10	200
Ashing	600	10	15	200
Atomization	1800	0	3	0
Exclusion	1900	1	2	200