Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for making a target applied to la-icp-ms analysis

A technology of LA-ICP-MS and a production method, which is applied in the field of target production, can solve the problems of inability to produce sulfide calibration standards, and achieve the effect of good application prospects.

Active Publication Date: 2022-05-31
CHINA UNIV OF GEOSCIENCES (WUHAN)
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the resin impregnation method cannot produce the target target of the sulfide calibration standard that can be used stably for a long time.

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
  • A method for making a target applied to la-icp-ms analysis
  • A method for making a target applied to la-icp-ms analysis
  • A method for making a target applied to la-icp-ms analysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment 1 Preparation of silver sulfide standard sample solid powder

[0070] The specific process of the preparation method of the silver sulfide standard sample solid powder provided in this embodiment is as follows: figure 1 shown, including the following steps:

[0071] First, mix 3000 μg Fe, Cu, Zn, Pb with 1000 μg other single-element solution standards to prepare a multi-element solution: PGE, Au, Ti, V, Cr, Mn, Co, Ni, Ga, Ge, As, Se, Y, Mo, Cd, In, Sn, Sb, Te, Re, Tl, Bi and REE (1000μg / ml) (standard solution provided by China Iron and Steel Research Institute), a total of 45 single element solutions, placed in 100 ℃ electric heating After the plate was evaporated to dryness, 1 ml (2% v / v) HNO was used 3 Dissolve salts.

[0072] Next, dope the dissolved multi-element solution with 6 g of silver sulfide sulfur isotope standard material (the standard material is provided by the Institute of Mineral Resources, Chinese Academy of Geological Sciences, national...

Embodiment 2

[0073] Embodiment 2 investigates the influence of grinding time on the uniformity of solid powder

[0074] Grinding is a common method for preparing single- or multi-element doped powder standards. In this example, the silver sulfide standard sample powder provided in Example 1 was used to grind 30min and 240min respectively, and the influence of different grinding time on the analysis accuracy of powder tablet LA-ICP-MS was investigated. The relative standard deviation (RSD, 1sigma) is expressed, and the results are as follows figure 2 shown.

[0075] Depend on figure 2 It can be seen that after 30min grinding, the relative standard deviation (RSD, 1sigma) of most of the elements obtained is within 15-25%, the deviation is too large and does not meet the quality requirements; in contrast, after 240min grinding, the obtained The relative standard deviation (RSD, 1 sigma) of most elements is less than 10%, which is usually acceptable in LA-ICP-MS analysis. The results sho...

Embodiment 3

[0078] Example 3 Preparation of silver sulfide standard sample tableting target by powder tableting method

[0079] Take 0.5 g of the silver sulfide standard sample powder provided in Example 1, place it in a polyvinyl chloride (PVC) sample ring, fill it with polyethylene powder, and use a manual hydraulic sample maker (TP40, Herzog, Germany) to make the sample under the pressure of 240MPa. Press for 5 minutes, the specific process is as follows figure 1 As shown in (a), a silver sulfide standard sample tableting target was prepared.

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

No PUM Login to View More

Abstract

The invention provides a method for making a target suitable for LA-ICP-MS analysis, mainly by mixing the multi-element-doped solid powder with resin, and then adopting a centrifugal method to convert the multi-element-doped solid powder into stable target. The method can simply and quickly prepare a target that can be used stably for a long time, and is especially suitable for the preparation of easily oxidized sulfide calibration standards. Through this method, a silver sulfide standard RPSS containing 47 elements such as PGE, copper-loving elements, and rare earth elements was established. The homogeneity of most elements in RPSS is better than 10%, there is no obvious matrix effect, and the uniformity meets the requirements of microscopic analysis. , can be used as a sulfide calibration standard for LA‑ICP‑MS analysis; the results of elements in RPSS determined by LA‑ICP‑MS are basically consistent with the results of ICP‑MS; the prepared silver sulfide standard RPSS can also be used for LA‑ICP ‑MS studies analyze elemental fractionation behavior between different matrices such as sulfides, silicates and oxides.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and in particular relates to a method for making a target target for LA-ICP-MS analysis. Background technique [0002] The spatial distribution of trace elements is a hot spot in the analysis of geochemical research, and plays an important role in geological and environmental geochemical research. It acts as a sensitive geochemical tracer in magma and hydrothermal sulfide, and is useful for geological research to understand magmatic heat. The mineralization of liquid processes and indicative thermodynamic conditions is of great significance and has also been widely used to explain the origin and evolution of the upper mantle magma. [0003] Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) is a powerful analytical tool. Solid powder samples are made into targets by appropriate methods, which can be used for in-situ analysis of the elements contained in the target. ...

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 Patents(China)
IPC IPC(8): G01N27/626
CPCG01N27/628
Inventor 赵赫杨文武张文罗涛胡兆初潘勇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)