| 摘要 |
PURPOSE:To ensure an accurate measurement of a desired element, by irradiating the light having a wavelength the desired element absorbs selectively and the light having a wavelength the element does not absorb to the sample atomic group and thus ionizing the desired element to deliver only the ion current. CONSTITUTION:A magnetic field of about 10K gauss is applied to the light source 12 by the magnet 43. Thus the atomic spectrum of the light radiated from the light source 12 is divided into the sigma and pi components by the Zeeman effect. For instance, if a sample in which the 1ppm lead element and the 4ppm cesium element are dissolved at a time is introduced, the cesium atom does not absorb both the Zeeman pi component light and the Zeeman sigma component light that passes through the acetylene flame. As a result, the AC amplifier 36 does not deliver the current value concerning the ion current of the cesium atom. Accordingly no difference of current value exists between the sample containing cesium and the sample of only lead. Thus the quantity of lead (desired element) can be measured accurately. |
