Mass spectrometer ion source spray device

Abstract

The invention discloses a mass spectrometer ion source spray device, which comprises an inner conduit used for introducing ion source liquid, an outer conduit used for introducing gas, an ultrasonic transducer sheet used for atomizing the ion source liquid to form atomized particles, an atomizing nozzle, and a cavity. The cavity is communicated with the inner conduit and the atomizing nozzle. Theouter conduit is communicated with the atomizing nozzle. The ultrasonic transducer sheet is arranged inside the cavity. The gas is used to adjust the shape of the sprayed atomized particle flow through the atomizing nozzle. The device also includes an MCU which is electrically connected with an external interface. The MCU is connected in series with a liquid level detection circuit and a liquid level electrode in turn, and the liquid level electrode is arranged in the cavity. The MCU is connected in series with a boost circuit and a resonant circuit in turn, and the resonant circuit is electrically connected with the ultrasonic transducer sheet. The spray device is equipped with the ultrasonic transducer sheet for atomizing the ion source liquid so as to make the atomized particles smaller. Moreover, nitrogen is introduced to adjust the shape of the atomized particles sprayed out, and the use of dry nitrogen is greatly reduced.

Description

technical field [0001] The invention relates to the field of mass spectrometers, in particular to the electrospray ionization technology of mass spectrometers. Background technique [0002] Mass spectrometer is an instrument that ionizes the substance to be tested into ion form, separates ions according to the spatial position and time sequence by controlling the electric field and magnetic field strength, and finally detects the ion current intensity for qualitative and quantitative analysis. When performing mass spectrometry analysis on the sample to be tested, the sample to be tested first enters the ion source through the sampling system, and then the ion fragments with sample information in the ion source are accelerated into the mass analyzer, because different ions are separated and separated in the mass analyzer. Arrive at the detector in sequence according to the mass-to-charge ratio, and record the time when each ion arrives at the detector to obtain the mass spect...

AI Technical Summary

Problems solved by technology

At present, commercial mass spectrometers on the market generally adopt the structure of double conduits. The inner capillary is responsible for spraying liquid, and the outer conduit blows dry nitrogen to achieve atomization. This atomization method can meet the normal ionization requirements, but the disadvantages are Need to provide high-throughput dry high-purity nebulized nitrogen, and it is difficult to further reduce the nebulized particles to a lower level

Images