ゼーマン変調原子吸光分光分析

抄録

This paper describes a new method of atomic absorption spectrometry using a Zeeman modulation technique. In this method, an external a. c. magnetic field is applied on sample atoms in a flame, causing a Zeeman modulation on the aborption line of the atoms. Absorption signals caused by the pertinent atoms are found to be selectively modulated, whereas the background absorption signals caused by molecular absorption, scattering and other origin are not in the least affected. A d. c. signals which indicates the true atomic density is obtained by a phase sensitive detection of the absorption signals.
Experimental and theoretical calibration curves (Cd concentration 0.1-2 μ/ml) for the Cd 2, 288 Å line are in good mutual agreement. Experimental curves (Cd concentration 2-1, 000 μ/ml) for the Cd 3, 261 Å line are also given and it is shown that the detected signals are proportional to the true cadmium concentrations within the indicated ranges.