A method for determining the content of lead and cadmium elements in silver ornaments
A technology of element content and silver jewelry, which is applied in the detection field of silver jewelry element content, can solve the problems of low content of lead and cadmium elements, inaccurate detection results, and inability to obtain accurate data, etc., achieving high recovery rate and good stability Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0027] Example 1: Adsorption experiment of lead and cadmium elements by silver chloride in the national standard GB / T 21198.5-2007 test method.
[0028] Prepare a mixed standard solution with a content of 50 μg / mL of lead and cadmium, and then use the mixed standard solution of lead and cadmium to prepare a series of mixed standards of lead and cadmium with a concentration of 0, 1.0, 2.0, 3.0, 5.0, and 10.0 μg / mL The solution is measured on the machine, and the appropriate curve equation is selected to establish a working curve.
[0029] Use nitric acid and high-purity silver (silver content higher than 99.99wt%) to prepare 50μg / mL silver-containing matrix solution, then measure 10.00mL of 50μg / mL silver-containing matrix solution and place it in a 50mL beaker, add 1.00, 5.00, 10.00mL respectively After adding 15mL of concentrated nitric acid, slowly heating to drive out the nitrogen oxides. Then slowly drop 2mL of 37wt% hydrochloric acid solution, after standing still for 2 ...
Embodiment 2
[0039] Embodiment 2: the experiment of measuring lead, cadmium element content in the silver solution by thiocyanate solution.
[0040] Prepare a mixed standard solution with a content of 50 μg / mL of lead and cadmium, and then use the mixed standard solution of lead and cadmium to prepare a series of mixed standards of lead and cadmium with a concentration of 0, 1.0, 2.0, 3.0, 5.0, and 10.0 μg / mL The solution is measured on the machine, and the appropriate curve equation is selected to establish a working curve.
[0041] Use nitric acid and high-purity silver (silver content higher than 99.99wt%) to prepare 50μg / mL silver-containing matrix solution, then measure 10.00mL of 50μg / mL silver-containing matrix solution and place it in a 50mL beaker, add 1.00, 5.00, 10.00mL respectively After adding 15mL of concentrated nitric acid to the standard solution of the mixed series of two elements, slowly heat to drive away the nitrogen oxides. Then slowly drop into 2mL of 0.25g / mL potas...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com