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Oil fluid online mixing sample introduction device for spectroscopic analysis and application thereof

A spectroscopic analysis and sampling device technology, applied in the field of analytical chemistry, can solve the problems of inconsistent matrix background, affecting the measurement results, etc., and achieve the effects of fast speed, accurate sample injection, and simple operation steps

Inactive Publication Date: 2015-11-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing detection device, due to the many operation steps and the need to use an electronic balance for precise weighing, this not only requires a stable and good laboratory environment, but also requires extra care in operation to ensure the accuracy and precision of the detection results Spend
In addition, organic matter usually has a significant impact on the plasma, and the non-continuous sampling method may lead to inconsistent matrix background, thereby affecting the measurement results

Method used

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  • Oil fluid online mixing sample introduction device for spectroscopic analysis and application thereof
  • Oil fluid online mixing sample introduction device for spectroscopic analysis and application thereof
  • Oil fluid online mixing sample introduction device for spectroscopic analysis and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 , is an overall structure diagram of an online oil mixing and sampling device for atomic emission spectrometry analysis (taking a peristaltic pump as a sampling pump, a six-way valve as a multi-channel valve, and a mixing chip as a mixing component as an example).

[0031] Referring to Fig. 2, it is a schematic diagram of two injection states of a multi-channel valve (taking a six-port valve as an example).

[0032] see image 3 , is a schematic diagram of the hybrid chip structure.

[0033] The online mixing and sampling device in this embodiment includes two sampling branches, and the solvent therein flows into the mixing chip 17 and is mixed evenly before entering the nebulizer 18 for atomized sampling. One of the two branches is used to introduce the matrix solvent 15 and is only equipped with a peristaltic pump 13 , and the other is used to introduce the matrix solvent 14 and the sample to be tested 26 and is equipped with a peristaltic pump 12 and a...

Embodiment 2

[0039] In this embodiment, the oil sampling device such as figure 1 As shown, the specific experimental steps are as follows:

[0040] 1) Set the flow rate of the two sampling branches to be 200 μL / min, introduce aviation kerosene (matrix solvent) continuously and uninterruptedly, and place the six-way valve in the sampling state (such as Figure 2a shown);

[0041] 2) After the liquid flow is stable, use the microwave plasma torch (MPT) spectrometer developed by the laboratory to measure the intensity of the Zn element emission line (213.856nm) in real time;

[0042] 3) Switch the six-way valve to the sample loading state (such as Figure 2b shown), then the sample containing Zn (Conostan standard sample) is injected into the quantitative loop from the injection port 10 with a syringe, and then the six-way valve is switched back to the sample injection state;

[0043] 4) After the sample signal appears and disappears completely, repeat step 3) to introduce the next sample....

Embodiment 3

[0046] In this embodiment, the oil sampling device such as figure 1 As shown, the specific experimental steps are as follows:

[0047] 1) Set the flow rate of the two sampling branches to be 200 μL / min, introduce aviation kerosene (matrix solvent) continuously and uninterruptedly, and place the six-way valve in the sampling state (such as Figure 2a shown);

[0048] 2) After the liquid flow is stable, use the microwave plasma torch (MPT) spectrometer developed by the laboratory to measure the intensity of the Zn element emission line (213.856nm) in real time;

[0049] 3) Switch the six-way valve to the sample loading state (such as Figure 2b shown), then the sample (Conostan standard sample, 200ppm) containing Zn element is injected into the quantitative loop from the injection port 10 with a syringe, and then the six-way valve is switched back to the sample injection state;

[0050] 4) After the sample signal appears and disappears completely, repeat the six-way valve swi...

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Abstract

The invention provides an oil fluid online mixing sample introduction device for spectroscopic analysis; the device includes a first sample introduction branch for introducing a matrix solvent; a second sample introduction branch for introducing the matrix solvent and a to-be-tested sample; a flow velocity control component for controlling the sample introduction speed ratio of the first sample introduction branch to the second sample introduction branch; and a mixing passageway for evenly mixing an oil fluid in the first sample introduction branch and an oil fluid in the second sample introduction branch and introducing the oil fluid into a spectrometer for analysis. The oil fluid online mixing sample introduction device for spectroscopic analysis can be used in sample introduction detection of lubricating oil, gasoline, diesel oil, edible oil and other oil fluids. The problem of complex sample pretreatment process in oil fluid analysis is overcome, operation steps are reduced, real-time sampling and real-time analysis are realized, at the same time, the oil fluid sample introduction quantity and the mixing ratio with the matrix solvent can be precisely controlled, moreover, the sample addition cannot change the overall sample introduction speed of organic reagents, and a background signal is kept relatively stable.

Description

technical field [0001] The patent of the present invention relates to an auxiliary device for spectral analysis in the field of analytical chemistry, and specifically refers to an online mixing and sampling device for oil in spectral analysis and its application. Background technique [0002] The performance of lubricating oil and other oils directly affects the service life of corresponding mechanical parts. The content of wear and pollutant elements (Fe, Cu, Mg, Zn, etc.) in used lubricating oil is an important reference for monitoring lubricating oil performance and predicting various mechanical failures. For example, the patent document with publication number CN101614656B provides a method for quantitative analysis of iron particles and organic iron in lubricating oil. The solid particles are separated, and then filtered through a filter membrane with a pore size of 0.45 microns. Finally, the concentration of organic iron elements in the oil sample is measured by an oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N35/10
Inventor 张涛朱旦应仰威金伟金钦汉
Owner ZHEJIANG UNIV