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Method for simultaneously determining contents of gold, silver, platinum and palladium in low nickel matte and application

A technology of matte nickel and content, applied in the field of precious metal determination, can solve the problems of inability to measure multiple elements at the same time, high dosage of lead oxide, low accuracy, etc., and achieves the effects of low detection limit, wide detection range and convenient detection.

Active Publication Date: 2021-10-01
北矿检测技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] ①Small precision and low accuracy;
[0004] ②The amount of lead oxide is high;
[0005] ③ Cannot measure multiple elements at the same time

Method used

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  • Method for simultaneously determining contents of gold, silver, platinum and palladium in low nickel matte and application
  • Method for simultaneously determining contents of gold, silver, platinum and palladium in low nickel matte and application
  • Method for simultaneously determining contents of gold, silver, platinum and palladium in low nickel matte and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] The present embodiment measures the content of gold, silver, platinum and palladium in low matte nickel, and concrete process is as follows:

[0108] (1) Take 15g of low-matte nickel powder and put it in a tall beaker, add 20mL of nitric acid (1+7), add 60mL of concentrated sulfuric acid after dark green copper nitrate appears, cover the watch glass, and place the beaker on a high-temperature electric furnace Steam until paste, remove and cool to room temperature, add water and sodium chloride solution, add filter pulp, boil, wash watch glass and cup wall with warm water, and filter with medium-speed quantitative filter paper after cooling slightly.

[0109] (2) Transfer all the sediment to the filter paper, wash the cup wall and the sediment with warm water. The wiped filter paper and the filter paper loaded with sediment were placed in a clay crucible, put into an assay furnace, and ashed from room temperature to 500° C. to obtain the first ashed product.

[0110] (3...

Embodiment 2

[0116]This embodiment measures the content of gold, silver, platinum and palladium in low-matte nickel. The difference from Example 1 is that 10 g of low-matte nickel powder is taken in step (1), and the crucible is placed at 850 ° C in step (4). In the gold electric furnace, the temperature was raised to 1100°C within 50 minutes, the ash dish was preheated at 985°C for 20 minutes in step (5), and the temperature of the ash blower was 885°C; the solution 2 to be tested was obtained in step (7), and other steps were the same as in Example 1 , which will not be repeated here.

Embodiment 3

[0118] This embodiment measures the content of gold, silver, platinum and palladium in low-matte nickel. The difference from Example 1 is that 20 g of low-matte nickel powder is taken in step (1), and the crucible is placed at 950 °C in step (4). In the gold electric furnace, the temperature was raised to 1100°C within 60 minutes, the ash dish was preheated at 975°C for 20 minutes in step (5), and the temperature of the ash blower was 880°C; the solution 3 to be tested was obtained in step (7), and other steps were the same as in Example 1 , which will not be repeated here.

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Abstract

The invention provides a method for simultaneously determining the contents of gold, silver, platinum and palladium in low nickel matte and application, and particularly relates to the technical field of precious metal determination. The method for simultaneously determining the contents of gold, silver, platinum and palladium in low nickel matte comprises the following steps: A, sequentially adding nitric acid and sulfuric acid into the low nickel matte for dissolving to obtain a first solution; B, adding soluble chlorine salt into the first solution, filtering to obtain a first precipitate, and ashing the first precipitate to obtain a first ashing substance; C, uniformly mixing the first ashing substance with lead oxide, a flux and a reducing agent to obtain a to-be-melted substance, melting the to-be-melted substance, and cooling and separating the substance after melting to obtain a lead buckle and molten slag; D, performing soot blowing on the lead buckle to obtain combined particles, and dissolving the combined particles to obtain a solution to be measured; E, measuring the contents of gold, silver, platinum and palladium in the solution to be measured on an inductively coupled plasma emission spectrometer. The method is convenient to detect, high in sensitivity, low in detection limit and good in stability.

Description

technical field [0001] The invention relates to the technical field of precious metal determination, in particular to a method and application for simultaneously determining the contents of gold, silver, platinum and palladium in low-matte nickel. Background technique [0002] Existing methods for measuring the content of precious metals in low nickel matte, including fire assay gold method, gravimetric method or atomic absorption method, mainly have the following defects: [0003] ①Small precision and low accuracy; [0004] ②The amount of lead oxide is high; [0005] ③It cannot measure multiple elements at the same time. [0006] In view of this, the present invention is proposed. Contents of the invention [0007] One of the purposes of the present invention is to provide a method for simultaneously measuring the content of gold, silver, platinum and palladium in low ice nickel, so as to alleviate the problems of low precision, low accuracy, high amount of lead oxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/38
CPCG01N21/73G01N1/38
Inventor 史博洋王皓莹汤淑芳刘秋波
Owner 北矿检测技术股份有限公司
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