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:
Jun. 17, 2025
Filed:
Jul. 20, 2022
First Institute of Oceanography, Ministry of Natural Resources, Qingdao, CN;
Ocean University of China, Qingdao, CN;
Shandong Marine Resource and Environment Research Institute, Yantai, CN;
Guangquan Chen, Qingdao, CN;
Wen Liu, Qingdao, CN;
Shibin Zhao, Qingdao, CN;
Chunqian Li, Qingdao, CN;
Jinjia Guo, Qingdao, CN;
Yancheng Wang, Qingdao, CN;
Bochao Xu, Qingdao, CN;
Xiaofei Yin, Qingdao, CN;
Shan Sun, Yantai, CN;
First Institute of Oceanography, Ministry of Natural Resources, Qingdao, CN;
Ocean University of China, Qingdao, CN;
Shandong Marine Resource and Environment Research Institute, Yantai, CN;
Abstract
Disclosed is a method for determiningRa in a sediment by using a pulse ionization chamber emanometer, which belongs to the technical field of analysis and measurement. A pulse ionization chamber emanometer (PIC), a new emanometer, is used. Based on the half-life characteristics of different radon isotopes, one can separate theRn activity from the total counts by dual counting. The resultingRn measurement then can be used to determine theRa activity in sediment according to the principle of secular radioactive equilibrium.