Wavelength (nm) HC lamp current (mA) Slit Width (nm) Detection Limit (ug/L) Fuel-gas flow rate (L/min)
Cu 324.8 4.0 0.50 3 2.0
Ni 232 4.0 0.20 10 2.0
Fe 248.3 5.0 0.20 6 2.0
Mg 285.2 9.0 1.3 10 2.2
Zn 213.9 5.0 1.0 1 2.0
Cr 357.9 7.0 0.20 6 2.9
Table 1: Optimum analytical conditions for selected trace element analysis using air–acetylene flame on atomic absorption spectrophotometer.