Table 2
Operating conditions and data acquisition parameters for ICP-OES spectrometer

Parameter	Wavelength	Parameter	Operating conditions
Pb	220.353	RF power	1,300 watts
As	193.696	Nebulizer flow	0.65 L/min
Cd	228.802	Auxiliary flow	0.2 L/min
Ni	231.604	Plasma flow	12.0 L/min
Al	396.153	Sample flow	1.5 L/min