| 摘要 |
PURPOSE:To decrease the fluctuation of atom vapor at the time of atomizing and to restrain the consumption of an atomizing part at the time of cleaning, by stopping a carrier gaseous flow for 0.1-5sec before atomizing and also, starting again immediately after the atomizing. CONSTITUTION:A sample solution is charged into an atomizing part of a high temperature furnace and is dried, thereafter, heat treatment is carried out. A sheath gaseous flow is stopped by closing a solenoid valve for carrier gaseous flow and atomization is carried out after 0.1-5sec at the latter half of said heat treatment. At the same time, the absorption intensity of light having some specific wavelength by atom vapor is detected by using a hollow cathode lamp, a spectroscope and a detector and the density of metals to be measured is measured. Further, the solenoid valve for the carrier gas flow is opened immediately after the atomization and a carrier gas flow is flowed again and then, heat cleaning of the atomizing part of the high temperature furnace is carried out at high temperature. Hereby, the fluctuation of atom vapor is decreased and the measurement of atomic absorbance is performed in good accuracy. |
