Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for one-step column separation of Sr, Nd and Pb in geologic sample

A geological sample and column-passing technology, applied in the field of chemical analysis, can solve problems such as low preparation efficiency, increased risk of cross-contamination, and large amount of waste liquid discharge

Active Publication Date: 2015-06-17
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF1 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional sample preparation method takes at least 3 days to prepare a batch of geological samples (about 30), the preparation efficiency is low, and the waste liquid discharge is large; in addition, the sample preparation process involves multiple times of evaporation and transfer of the sample solution, The cleaning and equilibration of various ion exchange columns greatly increases the risk of cross-contamination during operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for one-step column separation of Sr, Nd and Pb in geologic sample
  • Method for one-step column separation of Sr, Nd and Pb in geologic sample
  • Method for one-step column separation of Sr, Nd and Pb in geologic sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Dissolving samples: Weigh 65-70mg of basalt (BCR-2) rock powder into a PFA sample dissolver, add 3mL 29M HF and 0.3mL 14M HNO at the same time 3 , seal the sample dissolving vessel and place it on a 190°C electric heating plate to keep warm for 4 days. Then open the sample dissolver to evaporate the sample to dryness, add 2mL of 6M HCl and place it on a heating plate at 100°C for 12 hours, and then evaporate the sample to dryness at 150°C. Finally, add 1.0 mL of 2.5M HNO 3 And put it on a 100°C electric heating plate to keep warm overnight, and prepare to pass through the column for separation after cooling. All the above operations are carried out in a class 100 fume hood and a class 100 clean bench in a class 1000 clean room to obtain low Sr, Nd, Pb blank background values.

[0056] (2) Chemical separation: spot the dissolved sample solution on the pretreated mixed resin to separate Sr, Nd, and Pb from the matrix solution. The mixed resin column is composed of ...

Embodiment 2

[0075] Embodiment 2 is roughly the same as Embodiment 1, except that the geological sample selected in this embodiment is BIR-1 (basalt), and the Sr, Nd, and Pb isotope detection results are shown in Table 3, Table 4, and Table 5, respectively.

Embodiment 3

[0077] Embodiment 3 is roughly the same as Embodiment 1, except that the geological sample selected in this embodiment is AGV-2 (andesite), and the Sr, Nd, and Pb isotope detection results are shown in Table 3, Table 4, and Table 5, respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for one-step column separation of Sr, Nd and Pb in a geologic sample. The method comprises the following steps: dissolving the geologic sample to obtain a sample solution; and chemically separating, allowing the sample solution to go through an exchange column supported with A cation resin and Sr specific resin to respectively separate Sr, Nd and Pb, wherein the A cation resin is positioned at the upper layer of the exchange layer, the Sr specific resin is positioned at the lower layer of the exchange column, the A cation resin is a strong acid cation exchange column containing a sulfonic acid exchange group and adopting a styrene-divinyl benzene copolymer as a skeleton, the cross-linking degree of the A cation resin is 12%, and the Sr specific resin is an inert resin support supported with a solution formed by dissolving dicyclohexyl crown ether in a liquid organic solvent.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, in particular to a method for separating three elements of Sr, Nd and Pb in geological samples. Background technique [0002] As the most widely used tracer method in solid earth science, the Sr-Nd-Pb isotope method has been widely concerned by earth scientists. However, the Sr-Nd-Pb isotope ratio has a small variation range in different geochemical reservoirs, so the basis for the application of the method is a high-precision isotope measurement technology, especially the isotope ratio test of Sr-Nd and Pb Accuracy, more stringent requirements (≤0.003% (2RSE) and ≤0.05% (2RSE)). Thermal ionization mass spectrometry (TIMS) has the advantages of high accuracy, high sensitivity, and weak memory effect. It is considered as the benchmark technology for Sr-Nd-Pb isotope analysis and is widely used in the field of earth science. However, thermal ionization mass spectrometers have strict req...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N30/06
Inventor 李友连李潮峰储著银郭敬辉
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com