Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining silver content in crude copper

A technology with silver content and blister copper, applied in the field of analytical chemistry, can solve problems such as labor consumption, time-consuming, environmental pollution, etc., and achieve the effects of simple experimental steps, environmental protection, and high accuracy

Inactive Publication Date: 2018-08-24
CHANGCHUN GOLD RES INST
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for measuring the silver content in blister copper to solve the problems of time-consuming, labor-intensive and environmental pollution when measuring the silver content in blister copper

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for determining silver content in crude copper
  • Method for determining silver content in crude copper
  • Method for determining silver content in crude copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh the mass of the sample as 1.0000g, denoted as m 0 , accurate to 0.0001g, put the sample in a 250mL beaker, add 1mL water to wet the sample;

[0027] Step 2: Add 20mL (1+1) inverse aqua regia, cover the watch glass, heat and dissolve to 3mL on an electric hob at 220°C, remove and cool to room temperature;

[0028] Step 3, add 5mL of hydrochloric acid, continue heating to drive out the nitric acid, repeat twice;

[0029] Step 4. Transfer the sample solution to a 100mL volumetric flask, add 10-20mL hydrochloric acid, dilute to the mark with deionized water, and record it as V 0 , mixed, static clarified, accompanied by reagent blank;

[0030] Step 5, preparing silver standard series of different concentrations;

[0031] Step 6, dilute the sample solution 5 times, denoted as f, at the wavelength 328.1nm of the atomic absorption spectrophotometer, use the air-acetylene flame, measure the absorbance of the solution, find out the corresponding silver concentration fro...

Embodiment 2

[0049] Step 1. Weigh the mass of the sample as 1.0000g, denoted as m 0 , accurate to 0.0001g, put the sample in a 250mL beaker, add 1.5mL water to wet the sample;

[0050] Step 2: Add 25mL (1+1) inverse aqua regia, cover the watch glass, heat and dissolve on an electric hob at 230°C to 4mL, remove and cool to room temperature;

[0051] Step 3, add 8mL of hydrochloric acid, continue heating to drive out the nitric acid, repeat twice;

[0052] Step 4. Transfer the sample solution to a 100mL volumetric flask, add 15mL hydrochloric acid, dilute to the mark with deionized water, and record it as V 0 , mix well, stand still and clarify, along with the reagent blank;

[0053] Step 5, preparing silver standard series of different concentrations;

[0054] Step 6, dilute the sample solution 10 times, denoted as f, at the wavelength 328.1nm of the atomic absorption spectrophotometer, use the air-acetylene flame, measure the absorbance of the solution, find out the corresponding silver...

Embodiment 3

[0074] Step 1. Weigh the mass of the sample as 1.0000g, denoted as m 0 , accurate to 0.0001g, put the sample in a 250mL beaker, add 2mL water to wet the sample;

[0075] Step 2. Add 30mL (1+1) inverse aqua regia, cover with a watch glass, cover the watch glass, heat and dissolve on an electric stove at 250°C to 5mL, remove and cool to room temperature;

[0076] Step 3, add 10mL of hydrochloric acid, continue heating to drive out the nitric acid, repeat twice;

[0077] Step 4. Transfer the sample solution to a 100mL volumetric flask, add 20mL hydrochloric acid, dilute to the mark with deionized water, and record it as V 0 , mixed, static clarified, accompanied by reagent blank;

[0078] Step 5, preparing silver standard series of different concentrations;

[0079] Step 6, dilute the sample solution 20 times, denoted as f, at the wavelength 328.1nm of the atomic absorption spectrophotometer, use the air-acetylene flame, measure the absorbance of the solution, find out the cor...

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

No PUM Login to View More

Abstract

The invention relates to a method for determining a silver content in crude copper, which belongs to the field of analytical chemistry. According to the invention, lefort aqua regia is used for digestion of a sample, hydrochloric acid is added for complexation of silver in the crude copper, and a flame atomic absorption spectrometry is used for determining the silver content. The method uses two reagents of the hydrochloric acid and nitric acid for digestion of the sample, the reagent is saved, and the experiment cost is reduced; the experiment steps are simple, and are easily grasped by inspectors, and are adapted to detection of large-batch samples; the accuracy is high, and the precision is good. The method avoids the poisonous and harmful medicines such as lead oxide, health of the inspectors can be protected, a purpose of protecting environment can be achieved, the method provides technical support and guarantee for the crude copper industry analysis tests, and popularization andapplication of the method in the industry can be promoted, the method has the advantages of high accuracy, short determination period, and environmental protection, and achieves a purpose of reducingcost and improving effect for enterprises.

Description

technical field [0001] The invention belongs to the field of analytical chemistry, in particular to a method for measuring silver content in blister copper. Background technique [0002] Blister copper is blown from matte with a copper content of 60%. After blowing, the copper content of matte is about 98.5%. After further refining by fire method, the copper content can reach 99.2% to 99.7%. It can be processed into copper Products are for daily use. There is a large market demand for the determination of the amount of silver in blister copper, including product arbitration, trading and other processes based on accurate results. At present, the promulgated national standard for the amount of silver in blister copper is YS / T 521.2-2009 "Methods for Chemical Analysis of Blister Copper Part 2: Determination of Gold and Silver by Fire Test Gold Method", which has a long determination process, high cost, and The shortcomings such as high work intensity, and the use of lead oxid...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/44
CPCG01N1/44G01N21/3103
Inventor 苏广东陈永红孟宪伟芦新根洪博
Owner CHANGCHUN GOLD RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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