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Calibrating method and device for total organic carbon analyzer

A calibration device, technology of total organic carbon, applied in the field of calibration, can solve problems such as inability to achieve accurate calibration

Inactive Publication Date: 2018-11-16
NAT INST OF METROLOGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the total organic carbon (TOC) analyzer of pure water has the problem of inaccurate measurement, it cannot be accurately calibrated

Method used

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  • Calibrating method and device for total organic carbon analyzer
  • Calibrating method and device for total organic carbon analyzer
  • Calibrating method and device for total organic carbon analyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like figure 1 As shown, the present invention provides a pure water total organic carbon analyzer calibration device. Wherein, the pure water total organic carbon analyzer calibration device includes a stirrer 1, a mixing bottle 2, an air inlet pipe 3, an exhaust pipe 4, a distribution pipeline 5, a pure water total organic carbon analyzer 6 for calibration, and a collection bottle 7.

[0047] The mixing bottle 2 is arranged on the agitator 1, and the mixing bottle 2 is a closed bottle made of quartz, which is used to hold and mix blank water and a TOC solution with a preset concentration. When in use, the blank water and the TOC solution with a preset concentration are passed into the mixing bottle 2, and the mixing is achieved through the stirring of the main body of the stirrer 1. The preset concentration of TOC solution is a high-concentration TOC solution set according to needs.

[0048] The air inlet pipe 3 is in communication with the gas inlet of the mixing bo...

Embodiment 2

[0055] In the second embodiment provided by the present invention, the structure of the pure water TOC analyzer calibration device in this embodiment is similar to the pure water TOC analyzer calibration device in Embodiment 1, and the similarities are not discussed. Again, just the differences.

[0056] In this embodiment, it is specifically disclosed that the pure water TOC analyzer calibration device also includes a peristaltic pump 9, and the peristaltic pump 9 is arranged on the distribution pipeline 5, and is used to extract the solution in the mixing bottle 2 and transport it to the The pure water total organic carbon analyzer 6 for calibration, the collection bottle 7 and the pure water total organic carbon analyzer 8 to be calibrated.

[0057] It should be noted that the height difference can also be used to arrange the pure water TOC analyzer 6 for calibration, the collection bottle 7 and the pure water TOC analyzer 8 to be calibrated below the mixing bottle 2, so th...

Embodiment 3

[0067] The pure water TOC analyzer was calibrated by using the calibration device of the above-mentioned embodiment 2, and the calibration item was indication error, and the indication error was within the allowable range. Calibration data is shown in the table below. The results show that the calibration method and device of the total organic carbon (TOC) analyzer of the present invention can carry out the measurement and calibration of the pure water total organic carbon analyzer, effectively suppress the serious interference of carbon dioxide in the air, and ensure the calibration result. However, conventional methods cannot eliminate the interference of carbon dioxide in the air and cannot be calibrated.

[0068] Examples of calibration devices and methods:

[0069] 1. Description of the main accessories of the calibration device

[0070] 1) HPLC precision syringe pump: flow range (0.5-5.0) mL / min, injection volume (0-100) uL Beijing Analytical Instrument Factory

[007...

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Abstract

The invention discloses a calibrating technology and device for a pure water total organic carbon analyzer. The calibrating device comprises a stirrer, a mixing bottle, an air inlet pipe, an exhaust pipe, a distribution pipeline, the pure water total organic carbon analyzer for calibration and a collecting bottle. According to the calibrating technology and device, during use, protective gas is continuously input into the mixing bottle, after air is discharged completely, blank water and a TOC solution with the known concentration are accurately input into the scale mixing bottle through an infusion pump, uniform stirring is carried out through the stirrer, the data measured by the high-accuracy pure water total organic carbon analyzer is compared with the result of dilution of TOC of thesolution in the mixing bottle, the result of the newly-prepared TOC standard solution obtained in the diluting and mixing processes is confirmed to be accurate and reliable, and the calibrating technology and device can be used for calibrating the pure water total organic carbon analyzer to be detected; due to the fact that the protective gas is continuously introduced into the mixing bottle, theair is driven out of the mixing bottle, and therefore the phenomenon that the detection precision is influenced due to the fact that carbon dioxide in the mixing bottle is blended into the mixing bottle can be avoided; the mixing bottle is made of a quartz material, so that the phenomenon that the detection accuracy is influenced due to the fact that metal ions is dissolved out due to the adoptionof a glass material can be avoided; the distribution pipeline is made of polytetrafluoroethylene, so that the problem that the detection accuracy is influenced due to the fact that free carbon elements in a pipeline enter a solution due to the adoption of a plastic pipeline can be solved; and accurate calibration of the pure water total organic carbon analyzer is realized.

Description

technical field [0001] The invention relates to the technical field of calibration, in particular to a calibration method and device for a total organic carbon (TOC) analyzer. Background technique [0002] Total organic carbon (TOC) analyzers are currently the most commonly used tools for measuring water pollution. Water pollution is mainly caused by organic pollution. Pure water total organic carbon (TOC) analyzer is to oxidize total organic carbon (TOC) in aqueous solution to carbon dioxide and measure its content. [0003] However, currently there is no device capable of calibrating pure water TOC analyzers. Once the pure water Total Organic Carbon (TOC) analyzer has the problem of inaccurate measurement, it cannot be accurately calibrated. [0004] Therefore, how to accurately calibrate the inaccurate pure water Total Organic Carbon (TOC) analyzer is a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0005] In view of ...

Claims

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Application Information

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IPC IPC(8): G01N33/18
CPCG01N33/1846
Inventor 马康
Owner NAT INST OF METROLOGY CHINA
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