Method for fast determination of silver in tricobalt tetroxide and lithium cobaltate
A technology for rapid determination of cobalt tetroxide, which is applied in measuring devices, material analysis through electromagnetic means, instruments, etc., to achieve the effect of accurate, reliable and fast methods
Inactive Publication Date: 2017-11-24
JINCHUAN GROUP LIMITED +1
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In response to the requirements of the company to improve the analysis methods of metal elements in lithium cobaltate and cobalt tetroxide, in terms of the analysis and testing of silver in lithium cobaltate and cobalt tetroxide, there is no method for detecting silver content in the product standards of lithium cobaltate and cobalt tetroxide. After searching the literature, there is no cobalt Therefore, it is urgent to establish an analysis and detection method for silver in lithium cobaltate and cobalt tetroxide.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] The present invention is only applicable to the hydrochloric acid reagent whose silver blank is less than 0.5 µg / L, or the reagent whose silver hydrochloride blank is less than 0.5 µg / L after being purified by a sub-boiling distillation device, and the water used is ultrapure water with a resistivity ≥ 18 MΩ.
[0025] A rapid determination method for silver in tricobalt tetroxide and lithium cobaltate, the determination is based on the detection principle of inductively coupled plasma mass spectrometry, the method includes instrument conditions, sample processing, working curve drawing, analysis result calculation, sample acidity experiment, matrix interference and elimination , The detection limit and lower limit of determination of the method, standard addition recovery experiment, precision experiment.
[0026] 1. Instrument experiment conditions
[0027] Using 1μg / L 59 Co. 115 In and 238 U mixed standard, optimize the adjustment of instrument working parameters. ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for fast determination of silver in tricobalt tetroxide and lithium cobaltate. The method comprises decomposing tricobalt tetroxide and lithium cobaltate samples through hydrochloric acid, adding an internal standard 115In standard solution into the decomposed product to eliminate the interference of the cobalt substrate and carrying out fast detection directly through inductively coupled plasma mass spectrometry. The method is accurate and reliable, has a detection limit of 0.051 micrograms per liter, a lower detection limit of 0.17 micrograms per liter, teat sample relative deviation of 4.48% to 26.1%, an adding standard recovery rate of 96. 0% to 113.3% and a detection range of 0.1 to 2.5 micrograms per gram. The method is fast and accurate and can meet the requirements of determination of 0.1 to 2.5 micrograms per gram of silver in lithium cobalt oxide and cobaltosic oxide.
Description
technical field [0001] The invention belongs to the technical field of metal testing and analysis in the material industry, and in particular relates to a rapid determination method for silver in battery materials tricobalt tetroxide and lithium cobaltate. Background technique [0002] Due to the rapid development of lithium-ion batteries, there is a large demand space for battery materials lithium cobalt oxide and cobalt oxide. As a major supplier of materials such as lithium cobalt oxide and lithium cobalt oxide, how to control product quality, find problems in time and improve them immediately, so as to ensure the sales of the company's products The customer base is the foundation for the company to remain invincible in the brutal market competition. In response to the requirements of the company to improve the analysis methods of metal elements in lithium cobaltate and cobalt tetroxide, in terms of the analysis and testing of silver in lithium cobaltate and cobalt tetrox...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 曹笃盟石晶晶邱平王艳萍温炜炜刘航
Owner JINCHUAN GROUP LIMITED