Abstract
For the determination of trace elements in iron, steel and iron are by atomic absorption analysis, the state of and the correction for influences by “the brackground” are studied.
Following three methods for the correction for backgrounds are suggested.
1) Correction with blank-test of pure iron treated in the same way as provided samples.
2) Correction with the transmittance of several elements other than the objective ones in provided solutions by the use of the emissive line near the analytical line.
3) Correction with the transmittance of several elements at the analytical line in the continuous spectrum by H2 hollow cathode lamp.
The first can be applied with satisfaction to the correction for the background of Fe, but not for other coexisting elements. The second can be applied to any coexisting elements, but not at the analytical lines influenced with the spectrum interference. The third cannot be applied to the samples contining much Fe, because of the spectrum interference by the analytical line of Fe on the measurement at continuous spectrum.
