The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2022
Filed:
Nov. 30, 2019
Applicant:
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, CN;
Inventor:
Chaofeng Li, Beijing, CN;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 49/00 (2006.01); B01D 15/36 (2006.01); H01J 49/16 (2006.01);
U.S. Cl.
CPC ...
H01J 49/0031 (2013.01); B01D 15/362 (2013.01); H01J 49/16 (2013.01);
Abstract
A method for strontium isotope analysis of picogram-level samples using highly sensitive silicotungstic acid emitter is presented by a thermal ionization mass spectrometry. The emitter has merits of extremely high sensitivity, low cost, simple operation, etc. It is an important innovation of the strontium isotope analysis of the picogram-level samples. Compared with a sample consumption of 1-50 ng of conventional emitter, the present invention only needs 30-200 pg to obtain satisfying measurement accuracy. The present invention greatly improves test sensitivity, and has broad application prospects in future.