ELECTROTHERMAL VAPORIZATION ATOMIC FLUORESCENCE SPECTRAL METHOD AND SPECTROMETER FOR DETERMINING CADMIUM

摘要

The present invention discloses an electrothermal vaporization atomic fluorescence spectroscopy and spectrometer for determination of Cadmium. The atomizer of the electrothermal vaporization atomic fluorescence spectrometer includes an atomization device and a capture trap; the capture trap comprises a Tungsten or Molybdenum coil, a holder, a cover and a power supply; the cover and the holder form a sealed space; the Tungsten or Molybdenum coil is arranged on the holder; the Tungsten or Molybdenum coil is located inside the sealed space formed by the cover and the holder; the cover is provided with an inlet and an outlet thereon. The electrothermal vaporization atomic fluorescence spectroscopy for determination of Cadmium comprises the following steps: dry the sample to be measured in the air, ash it, and collect the ash; under the Argon gas atmosphere, increase the said ash temperature to 1600~2000 °C, and make the resulting steam contact the Tungsten or Molybdenum coil; under the Hydrogen and Argon gas atmosphere, increase the temperature of the said Tungsten or Molybdenum coil to 1600~2000 °C release the Cadmium atom, and measure the Cadmium content byanalysis of the atomic fluorescence spectroscopy. The electrothermal vaporization atomic fluorescence spectroscopy and spectrometer for determination of Cadmium in the present invention can efficiently eliminate the matrix interference, and realize the accurate measurement of Cadmium.