A study of atomic absorption spectrometry
Determination of magnesium and calcium in slag and cast iron
1964 Volume 13 Issue 2 Pages 111-117
Details
1964 Volume 13 Issue 2 Pages 111-117
Atomic absorption spectrophotometric investigation of magnesium and calcium was carried out and a method was applied for the determination of magnesium and calcium in slag and the determination of magnesium in cast iron.
The absorbance for magnesium was measured at 285 mμ by using 30 mA of tube currents of hollow cathode lamp, 1.1 kg/cm2 of air pressure and 0.48 kg/cm2 of acetylene gas. Calcium was measured at 422 mμ by using 50 mA filament currents of hollow cathode lamp with 1.1 kg/cm2 air pressure and 0.5 kg/cm2 of acetylene gas.
Effects of diverse ions and acid concentrations were also examined.
Aluminum, silicon and several other ions interfered with the atomic absorption of magnesium and calcium in flame, but those interferences were all eliminated by 1500 ppm strontium in the sample solution. These fundamental results were applied for the determination of magnesium and calcium in slag.
Magnesium in cast iron was also determined by a direct addition method without any preliminary separation. The results were very accurate and highly reproducible.
