Plasma emission spectrum detection method of content of platinum, palladium and rhodium in ceramic materials
A technology of ceramic materials and emission spectroscopy, which can be used in material excitation analysis, thermal excitation analysis, etc., and can solve problems such as difficulties
Inactive Publication Date: 2011-09-21
刘征涛
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Problems solved by technology
Since the properties of solid materials based on ceramics are quite different from those of conventional solid samples such as soil, sediment or biological samples, the current inductively coupled plasma emission spectrometry (ICP) analysis method mainly detects platinum, palladium in conventional solid samples. Therefore, it is difficult to directly detect the content of platinum, palladium and rhodium in ceramic-based solid materials by using inductively coupled plasma emission spectrometry (ICP) analysis method
Method used
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Embodiment 1
[0032] Example 1: first repeatedly add 1-5ml concentrated HNO 3 , concentrated H 2 SO 4 Digest for more than 1 hour until there is only a small amount of solid residue in the acid solution, then add 2-10ml of 1:1 aqua regia to continue to digest the residue until there is no more solid residue, and all are digested into a solution.
Embodiment 2
[0033] Embodiment 2: first repeatedly add 1-5ml concentrated HNO 3 , concentrated H 2 SO 4 Digest for more than 1 hour until there is only a small amount of solid residue in the acid solution, and then use a microwave digestion furnace to repeatedly digest 0.2-1.0 grams of samples in the PTFE sample container, usually 2-3 times, about 0.5-1.0 hours, until there is no more solid residue, all digested into solution.
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Abstract
The invention relates to a plasma emission spectrum detection method of the content of platinum, palladium and rhodium in ceramic materials. The method comprises the following steps of: crushing mass block ceramic materials containing platinum, palladium and rhodium into medium and small blocks, grinding into powder in a grinder, sieving, filtering, homogenizing, then putting the obtained powder into a drier for drying, cooling in a vacuum device, then respectively weighing a little amount of dry powder samples, moving the dry powder samples into a container with acid and alkali resistance, carrying out concentrated acid resolution and extracting, and carrying out plasma emission spectrum detection by extracted liquid after constant volume. The method solves the difficulty that the platinum, palladium and rhodium in ceramic materials can not carry out detection by an inductance coupling plasma emission spectrum instrument.
Description
technical field [0001] The invention relates to a plasma emission spectrometry detection method for platinum, palladium and rhodium in ceramic materials, which comprises breaking a large piece of ceramic material containing platinum, palladium and rhodium into small and medium pieces, and then grinding it into powder in a grinder. Sieve and homogenize, then put it into a desiccator for drying and cool in a vacuum device, then weigh a small amount of dry powder samples, transfer them into acid and alkali resistant containers, carry out concentrated acid digestion and extraction, and extract the liquid after constant volume A method for performing plasma emission spectroscopic detection. Background technique [0002] Existing precious metal elements platinum (Pt), palladium (Pd) and rhodium (Rh) are often used as important catalysts in various ceramic materials, such as catalytic converter materials widely used in the purification of exhaust gas produced by gasoline and diesel...
Claims
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IPC IPC(8): G01N21/73
Inventor 刘征涛倪红
Owner 刘征涛