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A kind of ultra-low background gold special-effect resin and its preparation and application

A special effect, resin technology, applied in other chemical processes, chemical instruments and methods, ion exchange, etc., can solve the problems of unsuitable ultra-trace gold rapid enrichment and separation, low selectivity, precision and accuracy, etc. Low production costs, improved precision and accuracy, and low blanks in the entire process

Active Publication Date: 2020-07-24
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing carrier foam plastic enrichment and separation gold technology has low selectivity, precision and accuracy to gold, and is not suitable for the rapid enrichment and separation of ultra-trace gold, the present invention uses Fmoc-S-trityl The base-L-cysteine ​​(CAS: 103213-32-7) is loaded on the carrier resin, and a special effect resin is obtained, which has excellent selectivity to gold

Method used

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  • A kind of ultra-low background gold special-effect resin and its preparation and application
  • A kind of ultra-low background gold special-effect resin and its preparation and application
  • A kind of ultra-low background gold special-effect resin and its preparation and application

Examples

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Effect test

preparation example 1

[0057] The preparation method of ultra-low background gold special-effect resin comprises the steps:

[0058] S1) Add 50g of chelating agent Fmoc-S-trityl-L-cysteine ​​to 500mL of acetone, stir to dissolve, then add 500mL of styrene-divinylbenzene copolymer resin CG161c and mix evenly to obtain a mixture;

[0059] S2) Vacuum-dry the mixture at a temperature of 60° C. and a vacuum of 0.08 MPa to completely volatilize the solvent. The obtained special-effect resin is sealed in 3.0% ethanol solution and stored in a polypropylene tank.

preparation example 2

[0061] The preparation method of ultra-low background gold special-effect resin comprises the steps:

[0062] S1) Add 50 g of chelating agent Fmoc-S-trityl-L-cysteine ​​to 1000 mL of acetone, stir to dissolve, then add 700 mL of styrene-divinylbenzene copolymer resin CG300s and mix evenly to obtain a mixture;

[0063] S2) Heat the mixture under an infrared lamp at 1000-2000W and stir while heating to completely volatilize the solvent to obtain a special effect resin. The obtained special effect resin is sealed in 3.0% ethanol and stored in a polypropylene tank.

preparation example 3

[0065] The preparation method of ultra-low background gold special-effect resin comprises the steps:

[0066] S1) Add 50 g of chelating agent Fmoc-S-trityl-L-cysteine ​​to 500 mL of chloroform, stir to dissolve, then add 500 mL of styrene-divinylbenzene copolymer resin CG161c and mix evenly to obtain a mixture;

[0067] S2) 100mL of 6mol / L HCl was gradually added dropwise to the above mixture, and stirred continuously, the obtained special-effect resin could be directly loaded into the solid-phase extraction column.

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Abstract

The invention provides an ultra-low background gold special-effect resin as well as a preparation method and application thereof. The gold special-effect resin comprises a carrier resin and a chelating agent, and the gold special-effect resin is characterized in that the chelating agent is Fmoc-S-triphenylmethyl-L-cysteine. According to the preparation method, the chelating agent Fmoc-S-triphenylmethyl-L-cysteine is loaded on the carrier resin, the prepared special-effect resin can effectively enrich and detect trace gold in samples, and the detection precision is greatly improved. When the special-effect resin is used for carrying out enrichment and separation test on samples, the using amount is small, the whole-process blank is extremely low, the test precision and accuracy are high, and the detection limit is low. The preparation process of the special-effect resin is simple, can be completed in one step, is low in production cost and has obvious industrial value.

Description

technical field [0001] The invention belongs to the field of geochemistry, and in particular relates to an ultra-low background gold special-effect resin and its preparation and application. Background technique [0002] Precious metals, such as gold, palladium, platinum, especially gold, also play a very important role in the study of major geological issues such as planetary evolution and crust-mantle differentiation, so they have attracted extensive attention from geoscientists. However, the abundance of gold in the earth's crust is extremely low and its distribution is uneven, which brings great difficulties to the separation, enrichment and analysis of gold. [0003] At present, the commonly used gold enrichment and separation methods include coprecipitation separation, activated carbon adsorption enrichment separation method, solvent extraction enrichment separation method, foam plastic enrichment separation method, carrier foam plastic enrichment separation method and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01D15/08B01J20/30
CPCB01D15/08B01J20/267
Inventor 薛丁帅
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI