Title:
METHOD FOR DETERMINING SILVER, PLATINUM AND PALLADIUM IN PALLADIUM POWDER WITH HIGH SILVER ASH CONTENT
Document Type and Number:
WIPO Patent Application WO/2024/040636
Kind Code:
A1
Abstract:
A method for determining silver, platinum and palladium in a palladium powder with a high silver ash content. The method comprises the following steps: 1) weighing a sample, adding hydrochloric acid and hydrogen peroxide thereto to dissolve same, and filtering same to obtain a first filtrate and first filter residues; 2) adding hydrochloric acid and hydrogen peroxide to the first filter residues to dissolve same, filtering same, repeating the operations multiple times, collecting a filtrate and second filter residues, and combining the filtrate resulting from the filtration with the first filtrate to obtain a second filtrate; 3) washing the second filter residues with water multiple times, filtering same to obtain third filter residues, and combining the resulting filtrate with the second filtrate to obtain a third filtrate; (4) dropwise adding a reducing agent and water to the third filter residues to dissolve same at a low temperature, discarding a liquid and keeping residues, and repeating the operations multiple times to obtain fourth filter residues; 5) washing the fourth filter residues with water multiple times, sucking out a liquid, and keeping fifth filter residues; 6) adding nitric acid to the fifth filter residues to dissolve same, so as to obtain a dissolved solution; and 7) respectively subjecting the third filtrate and the dissolved solution to volume fixation, then sampling and diluting same, and determining same by means of ICP-OES. The method can reduce the residues of samples, decrease the errors of a test, and improve the detection accuracy.
Inventors:
HUANG ANPING (CN)
TANG ZHIBO (CN)
LI HONGXIANG (CN)
CAI YAFEI (CN)
SHU QIAOYUE (CN)
JIE HUI (CN)
CHEN HAIYAN (CN)
LI MAO (CN)
TANG ZHIBO (CN)
LI HONGXIANG (CN)
CAI YAFEI (CN)
SHU QIAOYUE (CN)
JIE HUI (CN)
CHEN HAIYAN (CN)
LI MAO (CN)
Application Number:
PCT/CN2022/117951
Publication Date:
February 29, 2024
Filing Date:
September 08, 2022
Export Citation:
Assignee:
SHUIKOUSHAN NONFERROUS METALS CO LTD (CN)
International Classes:
G01N1/40
Foreign References:
| CN111337477A | 2020-06-26 | |||
| CN107014766A | 2017-08-04 | |||
| CN113267485A | 2021-08-17 | |||
| CN108844949A | 2018-11-20 | |||
| JPH08260065A | 1996-10-08 | |||
| JPH10265863A | 1998-10-06 |
Attorney, Agent or Firm:
CHANGSHA BIAOZHI PATENT AGENCY (GENERAL PARTNER) (CN)
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