公开(公告)号：US20170191940A1

公开(公告)日：2017-07-06

申请号：US15320499

申请日：2015-06-19

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Mohamad SABSABI ,  Jean-Pierre MONCHALIN ,  René HÉON ,  Paul BOUCHARD

IPC: G01N21/71 ,  G01N21/27

CPC classification number: G01N21/718 ,  G01J3/02 ,  G01J3/44 ,  G01N21/274 ,  G01N21/64

Abstract: A method for laser induced breakdown spectroscopy (LIBS) calibration or LIBS assay comprises providing a plurality of reference samples, each having a respective, known concentration of an analyte, assaying each reference sample to obtain a respective LIBS spectrum, and for each reference LIBS spectrum, measuring an intensity of at least one spectral analyte line that varies with concentration of the analyte, and measuring a peak amplitude of at least one saturating line of a reference element. The ratio and known concentrations define a calibration curve for the analyte.

公开(公告)号：US20210148756A1

公开(公告)日：2021-05-20

申请号：US17045378

申请日：2019-04-24

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Paul BOUCHARD ,  Mohamad SABSABI ,  Christian PADIOLEAU

IPC: G01J3/18 ,  G01J3/02

Abstract: Spectrometer designs are provided. The spectrometer includes two planar diffraction gratings disposed in a cascade, without intervening optics therebetween. Advantageously, the described configurations may promote both a high throughput and a high resolution, enabling the design of a portable device having sufficient resolution for on-site use or in the laboratory. In some implementations, two different secondary diffraction channels may be provided.

公开(公告)号：US20240165674A1

公开(公告)日：2024-05-23

申请号：US18551220

申请日：2021-10-14

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： MOHAMAD SABSABI ,  Daniel GAGNON ,  Paul BOUCHARD ,  Aissa HARHIRA ,  Elton SOARES DE LIMA FILHO ,  Francis VANIER ,  Josette EL HADDAD ,  Alain BLOUIN ,  Christian PADIOLEAU ,  Antoine HAMEL

IPC: B07C5/342 ,  B07C5/02 ,  G01N21/71 ,  G01N21/84

CPC classification number: B07C5/3427 ,  B07C5/02 ,  G01N21/718 ,  G01N2021/845

Abstract: A system for the online sorting of ore samples based on mineralogy analysis includes a conveyor moving a stream of the ore samples along a conveying path, a LIBS module, a height measuring device, a focus controller and an airflow system. The LIBS module projects a LIBS laser beam along an optical path focused on an analysis spot of dimensions of the order of one or a few mineral components of the ore samples, and collects a returning LIBS light signal. The height measuring device and focus controller collaborate to adjust in real-time the focus of the LIBS laser beam to move the analysis spot perpendicularly to the conveyor according to a height of the ore samples crossing the optical path. The air flow system moves particles away from the optical path. A processing unit performs the mineralogy analysis of the ore sample based on the LIBS light signal.

公开(公告)号：US20210072159A1

公开(公告)日：2021-03-11

申请号：US17053093

申请日：2019-05-09

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Paul BOUCHARD ,  Mohamad SABSABI ,  Alain BLOUIN ,  Christian PADIOLEAU

IPC: G01N21/71 ,  G01J3/02 ,  G01J3/443 ,  G01J3/18 ,  G01J3/28 ,  G01J3/36

Abstract: A LIBS system to detect constituent elements of interest within a sample from plasma light resulting from irradiation of this sample is presented. The LIBS system has a hybrid configuration which provides both a low-resolution spectrum of the plasma light covering a broad spectral range, and a high-resolution spectrum of the same plasma light over a narrow spectral range centered on a spectral line or feature of a constituent element of interest of the sample. In some implementations, the LIBS system has a portable design and can perform onsite sample analyses.

公开(公告)号：US20190242826A1

公开(公告)日：2019-08-08

申请号：US16342543

申请日：2017-10-20

Applicant: NATIONAL RESEARCH COUNCIL OF CANADA

Inventor： Paul BOUCHARD ,  Mohamad SABSABI ,  Christian PADIOLEAU ,  Rene HEON ,  Peter John HARDMAN

IPC: G01N21/71

CPC classification number: G01N21/718 ,  G01N2201/0221 ,  G01N2201/06113

Abstract: Described are various embodiments of a system, method and device for laser induced breakdown spectroscopy (LIBS). In some embodiments, the LIBS system comprises a silicon photomultiplier (Si PM) operated in a time-gated photon counting mode. Some such embodiments allow for the provision of a portable LIBS device. Also provided are embodiments for the measurement of constituent carbon, gold and/or other precious metal group elements in a target sample.