Laser ablation sample feeding system

A sampling system, laser ablation technology, applied in the preparation of test samples, material analysis by electromagnetic means, measurement devices, etc., can solve problems such as gas path influence, and achieve the effect of avoiding leakage

Active Publication Date: 2016-09-21
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing laser ablation sampling system, the sample chamber can only accommodate a small amount of samples at a time
During the operation, the sample chamber needs to be opened frequently to replace the sample, which easily affects the gas path in the laser ablation sampling system

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0037] refer to figure 1 , figure 1 It is a schematic structural diagram of a laser ablation sample introduction system 100 in an embodiment of the present invention. The laser ablation sampling system 100 includes a main pipeline 110 , a first branch pipeline 120 and a second branch pipeline 130 . The main pipe 110 has a beginning and an end. During operation, the gas flows from the beginning of the main pipe 110 to the end of the main pipe 110, that is, the gas flows figure 1 Flow in the direction of A. The first branch pipeline 120 also has a beginning and an end, and the beginning of the first branch pipeline 120 is connected to the end of the main pipeline 110 . The gas flowing out from the end of the main pipeline 110 enters the first branch pipeline 120, and flows from the beginning of the first branch pipeline 120 to the end of the first branch pipeline 120, that is, the gas is figure 1Flow in the B direction. The second branch pipeline 130 also has a start end an...

Embodiment 2

[0065] refer to Figure 4 , Figure 4 It is another structural schematic diagram of the laser ablation sample introduction system 100 in the embodiment of the present invention. This embodiment also provides a laser ablation sample introduction system 100, which adds a vacuum pump 180 and a three-way valve 190 on the basis of Embodiment 1.

[0066] The three-way valve 190 has a first port 191 , a second port 192 and a third port 193 . The third interface 193 is connected to the end of the second branch pipeline 130 , and the first interface 191 is connected to the vacuum pump 180 .

[0067] The working process is as follows:

[0068] A plurality of samples are fixed on the sample holder bar 151 , and the samples are evenly arranged in the length direction of the sample holder bar 151 .

[0069] Close the second on-off valve 142 , the third on-off valve 143 and the fourth on-off valve 144 , and open the first on-off valve 141 . Carrier gas (inert gas, such as helium) is fe...

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Abstract

The invention discloses a laser ablation sample feeding system which comprises a first on-off valve, a buffer tank and a fourth on-off valve. The first on-off valve, the buffer tank and the fourth on-off valve are sequentially arranged on a main pipeline from the starting end to the tail end. The laser ablation sample feeding system further comprises an outer chamber and a second on-off valve which are sequentially arranged in a first branch pipeline from the starting end to the tail end. The laser ablation sample feeding system further comprises a sample chamber and a third on-off valve which are sequentially arranged on a second branch pipeline from the starting end to the tail end. The sample chamber is located inside the outer chamber. A sample inlet and a sample outlet opposite to the sample inlet are formed in the sample chamber. The laser ablation sample feeding system further comprises a sample feeding device arranged inside the outer chamber. The sample feeding device comprises a sample supporting strip which penetrates through the sample chamber in a slidable mode through the sample inlet and the sample outlet and a driving device connected with the sample supporting strip and used for driving the sample supporting strip to slide on a straight line where the sample inlet and the sample outlet are located. According to the laser ablation sample feeding system, automatic replacement of samples is achieved, the sample chamber does not need to be opened frequently, and therefore influences caused when the sample chamber is frequently opened on air ways in the laser ablation sample feeding system are avoided.

Description

technical field [0001] The invention relates to the technical field of inorganic element and isotope analysis and testing, in particular to a pretreatment system for inductively coupled plasma mass spectrometry, and in particular to a laser ablation sample introduction system. Background technique [0002] As a new in-situ sampling technology, laser ablation can be used in conjunction with various analytical instruments such as inductively coupled plasma mass spectrometry. Laser ablation can effectively avoid the problems of sample destruction caused by traditional wet digestion sample preparation, tedious and time-consuming sample preparation, loss of volatile analytes, and polyatomic ion interference caused by water and acid in the digestion solution. [0003] However, in the existing laser ablation sampling system, the sample chamber can only accommodate a small amount of samples at a time. During the operation, the sample chamber needs to be opened frequently to replace...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N35/10G01N27/62G01N27/626
CPCG01N1/44G01N27/62G01N35/10
Inventor 文明何康昊宋江锋姚勇杨雷邓立李佩龙
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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