Analysis method of gold in gold saltcyanide

An analysis method, cyanide technology, applied in the field of analysis, can solve problems such as cyanide pollution, achieve the effect of eliminating cyanide pollution and overcoming impurity interference

Inactive Publication Date: 2017-05-24
广东省工业分析检测中心
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium aurous cyanide and potassium aurous cyanide are highly toxic substances, and their purity directly affects the quality of the product and its application efficacy. The content is an important indicator of its quality. At present, there is no standard for the detection of gold in the relevant gold salt cyanide. Generally, the sponge gold is obtained by adding concentrated sulfuric acid, heating and smoking and decomposing, and the gold content is determined by gravimetric method. However, during the test process of this method Cyanide pollution is generated, and at the same time, metal ions such as calcium, barium, and lead in the sample and sulfate radicals form precipitates and mix into the sponge gold to cause interference

Method used

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  • Analysis method of gold in gold saltcyanide

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: Weigh 100g of anhydrous sodium carbonate, 25g of anhydrous borax, 50g of silicon dioxide, 300g of lead oxide, and mix evenly; weigh 0.1g of potassium aurous cyanide, 2.0g of flour and 60g of flux, and put them in a container and mix evenly, and cover it with a layer of sodium chloride; put the container in a high-temperature furnace and smelt at 1100°C for 30 minutes; the smelted lead alloy is separated by ash blowing at 900°C, and the end point is to blow off the lead ash; The obtained gold particles are heated, washed and dried with 5% dilute nitric acid solution; the weight of gold is weighed and the gold result is calculated. This parallel test was performed 7 times, and the measurement results are shown in Table 1 below.

Embodiment 2

[0020] Embodiment 2: Take by weighing 200g anhydrous sodium carbonate, 50g anhydrous borax, 100g silicon dioxide, 600g lead oxide, mix uniformly; Take by weighing 1.0g potassium gold cyanide, 3.0g flour and 150g flux, pack in the container and Mix evenly and cover with a layer of sodium chloride; put the container in a high-temperature furnace and smelt at 1300°C for 50 minutes; the smelted alloy is separated by ash blowing at 1000°C, and the lead ash is blown clean to be the end point; The gold particles are heated, washed and dried with 5% dilute nitric acid solution; the weight of the gold particles is weighed and the gold result is calculated. This parallel test was performed 7 times, and the measurement results are shown in Table 1 below.

[0021] Table 1 embodiment measurement result

[0022] Example The measurement results / % average value / % The relative standard deviation / % 1 68.15,68.10,68.20,68.18,68.07,68.23,68.09 68.15 0.09 2 57.55,57.68,...

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Abstract

The invention relates to an analysis method of gold in gold saltcyanide. The method comprises the following steps of (1) preparing a fluxing agent: uniformly mixing anhydrous sodium carbonate, borax anhydrous, silicon dioxide and lead oxide according to the proportion; (2) weighing a specimen and flour, uniformly mixing with the fluxing agent, coating a layer of sodium chloride thereon; (3) placing a container in a high temperature furnace, and smelting under the condition of high temperature; (4) melting smelted alloy at high temperature, and carrying out cupellationon lead so as to separate gold; (5) washing and drying the separated gold; (6) weighing the weight of the gold, and calculating a result. The method provided by the invention can be used for directly separating and enriching the gold from/in the gold saltcyanide, and is high in applicability, simple to operate, rapid in method, accurate in result, and free of pollution and interference. The method is suitable for determining the gold in a gold saltcyanide sample.

Description

technical field [0001] The invention relates to a gold analysis method, in particular to a gold analysis method in gold salt cyanide. [0002] technical background [0003] Potassium aurous cyanide (KAu(CN) 2 ) and potassium gold cyanide (KAu(CN) 4 ·H 2 O) are important chemical raw materials, white crystals, often used in the electroplating industry, and can also be used in the pharmaceutical industry and as analytical reagents. They also play an important role in the production of many precision instruments. Potassium aurous cyanide and potassium aurous cyanide are highly toxic substances, and their purity directly affects the quality of the product and its application efficacy. The content is an important indicator of its quality. At present, there is no standard for the detection of gold in the relevant gold salt cyanide. Generally, the sponge gold is obtained by adding concentrated sulfuric acid, heating and smoking and decomposing, and the gold content is determined ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 庄艾春肖红新唐维学岳伟
Owner 广东省工业分析检测中心
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