Analytical method for identifying gold, platinum and palladium in chemical samples

A technology for chemical samples and analysis methods, which is applied in the analysis of materials, material analysis by electromagnetic means, scientific instruments, etc., and can solve the problems of poor analysis results, low recovery rates, and different recovery rates.

Inactive Publication Date: 2015-09-23
河南省岩石矿物测试中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recovery rate is relatively low, and the recovery rate is different at different temperatures. Different samples have different properties, different adsorption speeds, and poor precision of analysis results.

Method used

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  • Analytical method for identifying gold, platinum and palladium in chemical samples
  • Analytical method for identifying gold, platinum and palladium in chemical samples
  • Analytical method for identifying gold, platinum and palladium in chemical samples

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The sample source for this experiment: Tanzania Geological Survey, the sample is soil, powdery. Analysis batch number: 2014Z179.

[0022] Other materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

[0023] experiment method:

[0024] Step 1 Accurately weigh 10.0 g of the sample in a porcelain boat, place the porcelain boat in a low-temperature muffle furnace and burn it. After the temperature rises to 650°C, continue burning for 1.5-2 hours. Let it cool slightly and take out the porcelain boat.

[0025] Step 2 Pour the burned samples in the porcelain boat into a 250 mL conical flask in order, and add 10 mL of water to moisten.

[0026] Step 3 Add 30 mL of concentrated hydrochloric acid and 10 mL of nitric acid and shake well. Place the beaker on a 200°C hot plate and heat it from a low temperature to around 25 mL. Remove the beaker from the hot plate and add 100 mL of water to shake well.

[0027] Step 4 Mak...

Embodiment 2

[0043] The sample source for this experiment: Hubei Provincial Institute of Geological Experiment. The sample is water system sediment. The sample sent to our center has been processed to -200 mesh (-0.074mm) powder, which can be directly used for analysis and testing. After receiving the sample, Check the samples against the sample delivery form, and number them after confirmation. Internal inspection (repeatability test) is coded according to 5% of the total number of samples and randomly selected.

[0044] Analysis batch number: 2015Z081.

[0045] Other materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

[0046] experiment method:

[0047] Step 1 Accurately weigh 10.0 g of the sample in a porcelain boat, place the porcelain boat in a low-temperature muffle furnace and burn it. After the temperature rises to 650°C, continue burning for 1.5-2 hours. Let it cool slightly and take out the porcelain boat.

[0048...

Embodiment 3

[0075] The source of the samples for this experiment: Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences. The samples are rocks (including carbonate, peridotite, shale, etc.). Analysis batch number: 2013Z021.

[0076] Other materials, reagents, etc. used in the following examples can be obtained from commercial sources unless otherwise specified.

[0077] The test method is the same as in Example 2.

[0078] Table 7 Some experimental data

[0079]

[0080]

[0081]

[0082] Reporting rate of elements: A total of 1721 samples were analyzed, and the detection limits of the analysis methods given by this party were statistically calculated. The reporting rates of the three elements were all higher than 95%, indicating that our analysis method can actually require.

[0083] Qualification rate of primary reference materials: 4 primary reference materials are inserted into each analysis batch (50 numbers are one batch), all samples are divided into 4...

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Abstract

The invention discloses an analytical method for identifying gold, platinum and palladium in chemical samples. Analytical identification process is completed by firing samples, dissolving ore by aqua regia and vibrating and enriching composite resin and determining by plasma mass spectrography. The analytical method can precisely analyze ultratrace gold, platinum and palladium under low detection limit, batch production and low cost so as to meet various technical requirements for analyzing geochemical samples.

Description

Technical field [0001] The invention belongs to the technical field of chemical identification, and specifically relates to an analysis method for identifying gold, platinum and palladium in chemical samples. Background technique [0002] Many governments regard precious metals as national strategic reserve metals, while the private sector regard precious metal jewelry as their new favorites. However, the content of precious metals in the earth's crust is extremely small, belonging to "ultra-trace elements", less than "rare elements", and more dispersed than some "sparse elements". The average abundance of gold, platinum, and palladium in geochemical samples is usually between 0.02-10X10-12, and needs to be separated and enriched in advance. The currently used assay methods are widely used due to their large sampling volume, which can better eliminate the effect of gold particles. The analysis result of the assay method often depends on the work experience of the analyst. The o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62
Inventor 王君玉唐志中曹立峰吴葆存陈静袁润蕾陈浩凤王敏捷陈冲科张帆
Owner 河南省岩石矿物测试中心
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