Table 2.

The operating conditions of the FAAS.

Parameter	Element matrix
	Cu	Pb	Zn	Fe
Wavelength	324.8 nm	283.3 nm	213.9 nm	372.0 nm
Slit width	0.5 nm	0.5 nm	0.5 nm	0.2 nm
Gain	60%	29%	33%	55%
Lamp current	4.0 mA	10.0 mA	5.0 mA	5.0 mA
Flame type	Air/acetylene	Air/acetylene	Air/acetylene	Air/acetylene
Air flow	13.50 L/min	13.50 L/min	13.50 L/min	14.90 L/min
Acetylene flow	2.20 L/min	2.20 L/min	2.50 L/min	2.20 L/min