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A method for autosampling dilution

A technology of automatic sample injection and injection, which can be used in the fields of automatic sample injection dilution and automatic sample injection, and can solve problems such as large measurement errors.

Active Publication Date: 2017-08-11
广东世绘林科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional dilution method will have a large measurement error due to the influence of the "pipeline"

Method used

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  • A method for autosampling dilution
  • A method for autosampling dilution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] An automatic sample injection dilution method is composed of a sample injection process, a back pumping process and a dilution process.

[0057] Among them, the sampling process includes but is not limited to the following steps:

[0058] A101. Multi-way valve group 1 opens the corresponding sampling channel valve, and at this time all other channel valves are closed;

[0059] A102. Start the reverse rotation of the peristaltic pump 2 to pump the object to be sampled into the metering tube 3;

[0060] A103. After the liquid level pumped into the metering tube 3 reaches the specified liquid level indicated by the liquid level sensor 4, stop the peristaltic pump 2 and close the sampling channel valve of the multi-way valve group 1;

[0061] A201. Open the injection valve 6, and at this time all other channel valves are closed;

[0062] A202. Start the peristaltic pump 2 to rotate forward, and discharge the sampling object in the metering tube 3 into the sample chamber; ...

Embodiment 2

[0089] This embodiment is basically the same as Embodiment 1, the difference is that a plurality of liquid level sensors 4 can be set on the metering tube 3, so as to realize the dilution of various dosages and various ratios, such as figure 2 shown.

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Abstract

The invention provides an automatic sampling dilution method. First, the specified dose of the object to be diluted and the diluent are injected into the sample chamber; All the liquid is pumped back to the metering tube; finally, the mixed liquid in the metering tube is re-measured, and the metered mixed liquid is re-discharged into the sample chamber. Test results show that the present invention can control the additional sampling error introduced by the first dilution to ±0.8%, and the additional sampling error introduced by the second dilution to ±1.5%.

Description

technical field [0001] The invention relates to an automatic sample injection dilution method, which is particularly suitable for automatic sample injection occasions requiring repeated multiple dilutions and large-scale dilutions, and can be widely used in the technical field of water quality monitoring (or detection). Background technique [0002] In terms of automatic injection dilution, the current routine practice is: [0003] 1. First inject the specified dose of sample to be diluted and the specified dose of diluent into the sample chamber; [0004] 2. Then extract the specified dose of mixed solution from the sample chamber; [0005] 3. The remaining mixed solution in the sample chamber is the final diluted sample. [0006] Restricted by pipeline layout and component structure, the pipeline between the control valve entering and leaving the sample chamber and the multi-way valve group (hereinafter referred to as "pipeline") is often relatively long. When the mixed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N35/10G01N1/38
Inventor 刘海明刘泓昱卓深张长林龙刚
Owner 广东世绘林科技有限公司