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Method for analyzing gold in liquid gold water
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An analysis method, liquid technology, applied in the field of chemical analysis, can solve problems such as uncertainty, inaccurate test results, gold interference, etc., and achieve the effect of short cycle and wide application range
Active Publication Date: 2015-07-01
广东省科学院工业分析检测中心
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Problems solved by technology
Due to the complex composition of gold-containing liquid samples, the solution contains a large number of other unknown metals and non-metallic elements, and some samples also contain a large amount of organic components, which is uncertain
Since there is no separation, it is easy to interfere with the determination of gold by using the conventional acid dissolution spectrum for direct measurement, and the detection result is inaccurate
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Embodiment 1
[0008] Example 1: 20g of sodium carbonate, 8g of anhydrous borax, 10g of silicon dioxide, 100g of lead oxide, and 3.0g of flour are mixed evenly and then poured into an assay gold crucible, and a surface with an area of 1 cm is made. 2 Take 2mL of electroplating gold water on the concave surface, add 0.1g of pure silver powder, shake it flat after a while, and cover it with a layer of 15g of anhydrous sodium sulfate. Raise the temperature to 1100°C within 45 minutes, keep it warm for 10 minutes, take out the crucible, tap it lightly 2~3 times to make all the lead sink to the bottom of the crucible, take out the lead buckle after cooling, knock the lead buckle into a square, put it in 900°C In the magnesia ash dish that has been burned for 20 minutes, after the molten lead is stripped, the furnace temperature is maintained at 850°C for ash blowing. When the alloy appears bright spots, take out the ash dish, take out the silver beads after cooling, and knock the silver beads in...
Embodiment 2
[0009] Embodiment 2: pipette 2mL of gold water recovered by wet method in the test gold crucible equipped with reagents, according to the operation steps of embodiment 1, batching, fire test gold, ash blowing, gold separation, weighing, calculate the sample according to the volume of the sample gold content. This parallel test was performed 8 times, and the measurement results are shown in Table 1.
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Abstract
A method for analyzing gold in liquid gold water is characterized in that sodium carbonate, anhydrous borax, silicon dioxide, lead oxide and flour are evenly mixed, then poured into a test gold crucible, a liquid sample is added, and pure silver powder is added to cover the Sodium sulfate water; put the assay gold crucible into the assay gold furnace, after heat preservation, heat up to 1100°C, and heat preservation for 10min; after cooling, take out the lead buckle, put it into a burnt magnesia ash dish at 900°C, and wait for the molten lead to desorb After the film, ash blowing; after cooling, take out the silver beads, add acetic acid solution to boil, wash the silver beads with deionized water, add nitric acid solution, heat to 5mL, pour out the solution, add nitric acid solution, heat to 5mL, remove and cool; After leaving the solution, wash with deionized water and bake the gold particles; after cooling, weigh the gold particles, and calculate the gold content of the sample according to the sample volume. Compared with the adsorption method, this method is simpler, has a shorter cycle, does not require sample pretreatment, adsorption, desorption and dissolution complicated and complicated process, the method is reliable, and the determination result is accurate. This method is suitable for the determination of gold in all liquid gold water samples.
Description
technical field [0001] The invention relates to a chemical analysis method, in particular to a chemical analysis method for precious metal element gold in all liquid gold water samples by adopting fire test gold enrichment extraction. technical background [0002] A large amount of gold-containing solution is produced in modern industry, mainly from the electroplating industry and precious metal recycling enterprises. The gold-plating solution in the electroplating industry still contains a small amount of gold after use, and the precious metal recycling enterprise uses the gold-containing solution obtained by hydrometallurgy. The recovery of these precious metals has important economic value, and the accurate and rapid determination of the precious metal content is of great significance, which can provide objective and scientific data basis for trade and recovery process. Gold enrichment includes fire test gold enrichment method, activated carbon adsorption method, foam pla...
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