On-line electro-chemistrical separation and concentration tungsten filament electric heating atom absorption detection apparatus

Abstract

The invention discloses an on-line electric chemical separation enrichment tungsten-filament electrothermic atom absorption detection device, comprising an electric deposition separation enrichment unit, a tungsten-filament atomizer, a hollow cathode lamp, a micro CCD spectroscope, a tungsten-filament heating power, an electric deposition power, a flow injection system, a step motor and a computer. The electric deposition unit is vertically set in the cavity of the atomizer and at the right inferior of the tungsten-filament and a inner and outer double-layer groove is set on the top of the electric deposition unit, wherein two platinum electrodes are stuck on the inner layer groove and a sample injection hole is set in the center and two platinum electrode conductor eduction holes are set at the two side; and a liquid drainage hole is set in the outer layer groove. The lower end of a rod is connected with a connection sleeve and a sample filling tube, a discharging tube on the connection sleeve are respectively connected with a liquid feeding tube and a liquid discharging tube of a flow injection system and platinum electrode conductors are connected with an anode of the electric deposition power; and the tungsten-filament is connected with the atomization heating power and also connected with the cathode of the electric deposition power; and the connection sleeve is driven by the step motor to make the vertical operation. The device has strong anti-jamming capability and high automaticity.

Description

technical field [0001] The invention relates to detection technology, in particular to an on-line electrochemical separation and enrichment tungsten wire electrothermal atomic absorption spectrum detection device. Background technique [0002] Tungsten coil electrothermal atomic absorption spectrometer (TC-AAS) is an electrothermal atomic absorption spectroscopic analysis technique developed in the 1970s. [0003] At present, most tungsten wire electrothermal atomic absorption spectrometry detection devices determine the elements as follows: the solution of the sample to be tested is manually injected onto the surface of the tungsten wire through a micro-injector; then the tungsten wire is heated by the program, and the liquid sample is evaporated to dryness in sequence , ashing, atomization, and purification analysis process; the whole analysis process is carried out in a tungsten wire atomizer under the protection of argon-hydrogen mixed gas (common ratio: 10% hydrogen). ...

AI Technical Summary

Problems solved by technology

However, the current tungsten wire electrothermal atomic absorption spectrometer still has many deficiencies in actual sample analysis, the most important of which is: poor ability to resist matrix interference

This seriously restricts its practical application, so most of the current tungsten wire electrothermal atomic absorption spectrometry still stays in laboratory research.

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