A laser-induced field-induced droplet ionization device
By combining the laser proximity switch and the signal amplifier, the field-induced droplet ionization device is automatically triggered, which solves the problem of ionization signal detection of moving droplets and realizes the automated ionization and mass spectrometry detection of moving droplets.
CN115513037BActive Publication Date: 2025-09-26NANKAI UNIV
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Patent Information
- Application Number
- CN202211229643.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-08
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2042-10-08
AI Technical Summary
Technical Problem
Existing field-induced droplet ionization devices have difficulty detecting and triggering ionization signals of moving droplets, resulting in the sub-droplet ejection not being received by the mass spectrometer.
Method used
A laser proximity switch is used to detect when a droplet passes by, which automatically triggers field-induced droplet ionization. The laser sensing device is combined with the Arduino Nano development board and signal amplifier to generate and transmit a single pulse signal to trigger ionization.
Benefits of technology
Automatic triggering and detection of moving droplets are achieved, ensuring that sub-droplets are received and detected by the mass spectrometer, thereby improving the reliability of mass spectrometry analysis.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a laser-induced field-induced droplet ionization device, belonging to the field of ion sources for mass spectrometry analysis. The device primarily comprises a laser beam proximity switch, a high-voltage electrode, a grounding electrode, a stainless steel capillary, a signal amplifier, an Arduino Nano development board, and a host computer. The laser beam proximity switch consists of a transmitter and a receiver. A droplet passing through the laser light path between two vertically mounted electrodes closes the proximity switch. A pulse signal is emitted the instant the switch closes. The Arduino Nano development board reads this signal and outputs a single pulse. This pulse is amplified to the kilovolt level and applied to the high-voltage electrode for field-induced droplet ionization of moving droplets. The device achieves the following technical benefits: the host computer transmits a pulse width and a command to start or stop reading the A0 pin value to the Arduino Nano development board. The Arduino Nano development board then returns a string indicating the A0 pin status to the host computer for display.
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