FIELD: spectral analysis.
SUBSTANCE: method is based upon thermal atomization of the sample and excitation of atoms by means of electrons emitted by cathode-atomizer. Accelerating voltage is chosen to be lower than threshold of ignition of self-maintained discharge. Voltage of heating of cathode-atomizer should be chosen to be higher than its damage threshold. Damage is prevented and temperature of atomization is specified by means of limiting heat current due to negative feedback for cathode-atomizer radiation flux. Device has chamber with electrodes. Warmed-up electrode is optically connected with photoreceiver. Photoreceiver is connected with photocurrent amplifier. Photocurrent amplifier has feedback with current stabilizer connected between electrode heat source and warmed-up electrode.
EFFECT: reduced limit of detection of elements; improved reproducibility of analysis.
2 cl, 1 dwg
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