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Microwave rapid dissolving method for rhodium powder

A rhodium powder, microwave technology, applied in the field of rapid dissolution of rhodium powder

Inactive Publication Date: 2012-09-12
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the microwave digestion method has been maturely applied to the dissolution of precious metals gold, platinum, and palladium, the dissolution of rhodium powder is still an unsolved problem

Method used

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  • Microwave rapid dissolving method for rhodium powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: self-produced pure rhodium powder 1# (99.95% rhodium sponge)

[0023]Weigh 0.3g, put it into an agate mortar and grind it for about 20min, then accurately weigh 0.1000g, put it into a 100mL microwave digestion tank, add 10mL-15mL concentrated HCl, 2mL-5mL 30% over Hydrogen oxide, airtight, dissolve according to the program conditions in Table 1, open the tank to observe after cooling, one program has been completely dissolved. Transfer the solution into a beaker, and finally prepare a pure 1.000mg / mL rhodium standard solution, using YS / T 561-2009 "Methods for Chemical Analysis of Precious Metal Alloys Determination of Rhodium Content in Platinum-Rhodium Alloys" Calibration, the calibration value is 0.9998 mg / mL, which proves that the dissolution is complete.

[0024] In addition, take a little unground pure rhodium powder and ground pure rhodium powder, according to the requirements of GB / T 1421-2004 rhodium powder standard, adopt YS / T 363-2006 emission...

Embodiment 2

[0025] Embodiment two: imported pure rhodium powder 2# (99.98% rhodium powder, coarser particles)

[0026] Weigh 0.3g, put it into an agate mortar and grind it for about 40 min., accurately weigh 0.1000g, put it into a 100 mL microwave digestion tank, add 10 mL~15 mL concentrated HCl, 2 mL~5 mL 30% Hydrogen peroxide, airtight, dissolve according to the program conditions in Table 1, open the tank for observation after cooling, and there is still a little by naked eye observation. Add 2 mL to 5 mL of 30% hydrogen peroxide, seal it tightly, and then dissolve according to the program conditions in Table 1. After cooling, open the tank and observe that it has completely dissolved. Transfer the solution into a beaker, and finally prepare a pure 1.000mg / mL rhodium standard solution, using YS / T 561-2009 "Methods for Chemical Analysis of Precious Metal Alloys Determination of Rhodium Content in Platinum-Rhodium Alloys" Calibration, the calibration value is 0.9999mg / mL, which proves t...

Embodiment 3

[0028] Example 3: High-content rhodium waste 3# (sampled to a particle size of ≤ 150 mesh with a disc mill)

[0029] Accurately weigh 0.1000g, put it into a 100 mL microwave digestion tank, add 10 mL~15 mL concentrated HCl, 2 mL~5 mL 30% hydrogen peroxide, seal it tightly, dissolve according to the program conditions in Table 1, and open the tank after cooling , then add 2 mL ~ 5 mL 30% hydrogen peroxide, airtight, and then dissolve according to the program conditions in Table 1. After cooling, open the can, transfer the solution into a beaker, and finally prepare a 100 mL10% hydrochloric acid medium solution, using YS / T 561-2009 "Chemical Analysis Methods for Precious Metal Alloys Determination of Rhodium Content in Platinum-Rhodium Alloys" Hexaammine Cobalt Nitrate Gravimetric Method "Measuring, the measuring result is that the Rh content is 78.61%. It is 78.58% consistent with the measured value obtained by other dissolution methods.

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Abstract

The invention discloses a microwave rapid dissolving method for rhodium powder. The rhodium powder reaches a certain granularity through mechanical pretreatment; a proper solvent is added into the rhodium powder; and the rhodium powder is dissolved through a working program of a selected microwave instrument in a sealed manner. The rhodium powder with a mass about 0.1 g can be entirely dissolved within 4 hours. The microwave rapid dissolving method for the rhodium powder can be applicable to converting a solid sample into a solution in preparation of a pure rhodium standard solution, purity detection of the rhodium powder, and high-rhodium content rapid and accurate detection.

Description

technical field [0001] The invention relates to the field of analytical chemistry of platinum group metals, in particular to a rapid dissolving method for rhodium powder. Background technique [0002] The platinum group metals refer to the six elements of platinum, palladium, rhodium, iridium, osmium, and ruthenium. Platinum group metals have unique catalytic activity, oxidation resistance, corrosion resistance, high temperature resistance, etc., and have been widely used in various fields of modern industry. Especially in the field of environmental protection energy, petrochemical, medicine and military technology. But its resources are extremely scarce and expensive. Therefore, analysis and testing technology is inseparable from all aspects of product cost control, performance characterization, and trade. [0003] Analytical chemistry of platinum group metals generally has two main contents: purity detection and content detection. Most of the detection methods involved ...

Claims

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Application Information

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IPC IPC(8): G01N1/44
Inventor 马媛方卫李青
Owner SINO PLATINUM METALS CO LTD
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