公开(公告)号：US11835464B1

公开(公告)日：2023-12-05

申请号：US17672678

申请日：2022-02-15

Applicant: Applied Spectra, Inc.

Inventor： Alexander A. Bol′shakov ,  Chunyi Liu ,  Sudeep J. Pandey ,  Richard E. Russo

IPC: G01N21/71

CPC classification number: G01N21/718 ,  G01N2201/0636 ,  G01N2201/06113 ,  G01N2201/08

Abstract: Chemical composition of liquid phase samples is determined based on laser induced ablation spectroscopy of droplets. An aerosol jet comprising a carrier gas and liquid phase sample droplets, less than about 10 microns in diameter, is formed. An emissive plasma plume is generated from the sample droplets using a pulsed laser to deposit energy at a focal point in the aerosol jet. Light from the plasma plume is gathered with a concave mirror and focused into one end of a fiber optic lightguide. The lightguide can transmit spectral emissions from the plume to a spectrometer/detector which can send wavelength and intensity values to a computer. The computer is operable to determine a liquid sample composition based on the wavelength and intensity values.