Under acidic conditions, potassium borohydride reacts with acid to produce strong reducing hydrogen, and selenium in the sample reacts with hydrogen to form selenium hydride. Hydride forms ground state atoms in a hydrogen-argon flame, and the ground state atoms are excited by the light emitted by the selenium lamp to produce excited state selenium atoms. When the excited electrons of the excited state atoms return to the low-energy ground state, atomic fluorescence is generated. The intensity of atomic fluorescence is proportional to the concentration. The concentration of selenium is calculated by substituting the fluorescence intensity into the standard curve.
The instrument has many channels that can detect and display results simultaneously.
Using a specially coded hollow cathode lamp, the instrument automatically identifies elements and can monitor the service life of the hollow cathode lamp.
Shielded quartz furnace low-temperature atomizer reduces fluorescence quenching and gas phase interference, and improves atomization efficiency.
The instrument has power-on self-test, automatic diagnosis, and automatic fault alarm functions.
With high-precision digital pressure monitoring system, the instrument can control the gas flow automatically and accurately, and it has a new gas-saving device to effectively save argon consumption.
The instrument can be used to monitor domestic sewage, pollution source discharge water, surface water, groundwater in real time.
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