Ionization detection chamber of evaporative light scattering detector

Abstract

The invention discloses an ionization detection chamber of an evaporative light scattering detector. The ionization detection chamber comprises a detection chamber main body, the detection chamber main body is provided with a detection object inlet and a detection material outlet, the detection object inlet is provided with an atomizing nozzle, the side wall of the detection chamber main body is provided with an excitation light source, a light source absorption light trap opposite to the excitation light source is arranged on the side wall of the detection chamber, a detector lens cone is arranged on the detection chamber main body, the other end of the detector lens cone is connected with a photoelectric detection unit, and an induction electrode ring connected with the positive electrode of a high-voltage power supply is arranged in the detection chamber main body corresponding to the outlet of the nozzle main body; the inner diameter of the induction electrode ring is larger than the diameter of a gas column formed by aerosol sprayed by the nozzle and a nitrogen gas curtain outside the induction electrode ring, and a tip electrode connected with the negative electrode of the high-voltage power supply is arranged in the detection chamber main body corresponding to the detection material outlet.

Description

Technical field [0001] The present invention relates to an evaporative light scattering detector of the detection chamber, the ionization particularly relates to an evaporative light scattering detection chamber detector. Background technique [0002] Aerosols (aerosol by the solvent molecules have been vaporized evaporation unit and aggregation of the instrument is not gasified solute molecules into small liquid droplets) formed by evaporative light scattering detector into the evaporation unit and the atomization unit detects after the chamber, the source of irradiation, will produce small droplets of the solute scattering (already vaporized solvent molecules due to the particles are too small, scattering does not occur), and the spatial intensity of scattered light is directly proportional to the solute concentration distribution of the droplets, this is also the basis of such a detector for quantitative analysis. [0003] However, because of several factors led to this detect...

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Problems solved by technology

[0006] 3. Since the volume of the detection chamber cannot be made too large, and due to the need to avoid light, the outlet of the detection chamber cannot be made too large. The aerosol sprayed in a divergent manner will inevitably hit the wall of the detection chamber, which will bring two question,

[0007] First, the solute and solvent liquefy on the wall of the detection chamber, polluting the detection chamber. Second, the airflow field inside the detection chamber becomes very complicated, and the aerosol will form turbulent flow inside the detection chamber, which will reduce the detection accuracy. Superposition, reducing the real-time performance of the measurement

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