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

Technology for testing trace sample chromium isotope by taking niobium pentoxide as high-sensitivity emitter

A technology of niobium pentoxide and chromium isotope, which is applied in the field of analytical chemistry, can solve the problems that restrict the development of earth science and environmental science, have not yet developed a chromium isotope propellant, and cannot meet the needs of scientific research, etc., and reach the bottom of the propellant point sample Low cost, reduced experimental cost, enhanced analytical sensitivity

Active Publication Date: 2016-12-07
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large amount of sample analysis greatly restricts the development of earth science and environmental science, especially for some rare samples or samples with low chromium concentration, such as meteorites, lunar rocks, carbonate rocks, water samples and some biological samples, due to the inability to Providing sufficient samples leads to poor test accuracy and cannot meet the needs of scientific research
[0004] To sum up, no emitter suitable for chromium isotopes in trace samples has been developed so far

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
  • Technology for testing trace sample chromium isotope by taking niobium pentoxide as high-sensitivity emitter
  • Technology for testing trace sample chromium isotope by taking niobium pentoxide as high-sensitivity emitter
  • Technology for testing trace sample chromium isotope by taking niobium pentoxide as high-sensitivity emitter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of propellants

[0035] 1) Weigh 20±0.2mg of niobium pentoxide powder into a sample-dissolving bottle, add 3-4ml 3M hydrochloric acid to the airtight sample-dissolving device and keep it warm on a 100-degree electric heating plate for 2-3 hours, during which the sample-dissolving device is often shaken to clean Niobium pentoxide, lower point sample bottom.

[0036] 2) After the sample dissolving device is cooled to room temperature, use a pipette to take out the upper layer of hydrochloric acid solution, add 3ml of high-purity deionized water, seal the sample dissolving device and shake the sample dissolving device for 2 to 3 minutes, and use the pipette again to remove the upper layer. The solution was aspirated.

[0037] 3) According to the mass ratio of niobium pentoxide: 0.40M phosphoric acid of 20:1000, add 1ml of 0.40M phosphoric acid, put the two into a sample dissolving bottle, and shake well for the chromium isotope emitter.

[0038] 2. Sample ...

Embodiment 2

[0042] Embodiment 2 is roughly the same as Embodiment 1, except that 250 ng of NIST 3112a is used in this implementation to test the sensitivity and test accuracy of the emitter. The test results are shown in Table 2

Embodiment 3

[0044] Embodiment 3 is roughly the same as Embodiment 1, except that 100 ng of NIST 3112a is used in this implementation to test the sensitivity and test accuracy of the emitter. The test results are shown in Table 3

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
Granularityaaaaaaaaaa
Login to View More

Abstract

The invention provides a technology for testing trace sample chromium isotope by taking niobium pentoxide as high-sensitivity emitter. The technology comprises the following steps: 1) weighing niobium pentoxide and 0.40M phosphoric acid according to the mass ratio of the two being 20:1000, placing the niobium pentoxide and 0.40M phosphoric acid into a sample dissolving flask, and shaking as a nemitter of the chromium isotope; 2) coating the degassed tungsten filament with one microliter of emitter, performing low-temperature evaporation, then coating the evaporated emitter with the chromium standard sample, performing low-temperature evaporation, heating the filament to dark red and holding for three to five seconds, and finally zeroing the current of filament; and 3) feeding the sample into a thermal ionisation mass spectrometer, and testing chromium isotope by adopting a static multi-receiving mode. The method has the advantages of being high in sensitivity, low in cost, and simple and convenient to operate, and the like, and is an important creation of trace sample chromium isotope analysis; and compared with the analysis method needing consuming 200-1000ng of samples, the satisfactory testing precision can be obtained only by needing 5-20ng through using the method, the testing sensitivity is greatly improved, and the method has strong application prospects.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and in particular relates to a method for analyzing chromium isotopes of trace samples using niobium pentoxide as a propellant. Background technique [0002] Chromium has four natural isotopes ( 50 Cr, 52 Cr, 53 Cr and 54 Cr) is widely distributed in various rocks, fluids and organisms in nature. Through the study of Cr isotope composition, various geological processes in nature can be revealed. At present, Cr isotopes are mainly used in the fields of environmental science, astrochemistry, isotope geochemistry, groundwater pollution tracing and paleoceanography research. At present, in the field of earth and environmental sciences, thermal ionization mass spectrometry (TIMS) or multi-channel plasma mass spectrometry (MC-ICP-MS) are mainly used to determine the Cr isotope ratio in geological samples. Although the test efficiency of MC-ICP-MS is obviously better than that of TIMS,...

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
IPC IPC(8): G01N27/62
CPCG01N27/626
Inventor 李潮峰
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