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Automatic calibration method of water quality monitoring system with application of ultraviolet absorption method

A water quality monitoring system, a technology of ultraviolet absorption method, applied in measurement devices, color/spectral characteristic measurement, material analysis by optical means, etc., can solve the problems of heavy workload, cumbersome steps, easy to produce errors

Inactive Publication Date: 2012-09-05
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the calibration work is done manually, and the configuration of the standard solution on site is relatively cumbersome, the workload is large, and errors are prone to occur.

Method used

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  • Automatic calibration method of water quality monitoring system with application of ultraviolet absorption method
  • Automatic calibration method of water quality monitoring system with application of ultraviolet absorption method
  • Automatic calibration method of water quality monitoring system with application of ultraviolet absorption method

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Embodiment Construction

[0056] In the ultraviolet absorption method water quality monitoring system developed by the Hefei Institute of Material Science, Chinese Academy of Sciences, the automatic calibration method of the ultraviolet absorption method water quality monitoring system proposed by the present invention is realized.

[0057] like figure 2 As shown, the automatic calibration device of the present invention comprises a switching device motor 7, an optocoupler 6, a cuvette switching device 4, a first cuvette 0 (pure water), a second cuvette 1 (potassium hydrogen phthalate Concentration is 50mg / L), the third cuvette 2 (potassium hydrogen phthalate concentration is 100mg / L), the fourth cuvette 3 (potassium hydrogen phthalate concentration is 200mg / L). The cuvette switching device 4 is in the shape of a circular disc, the axis of which is installed on the front end shaft of the switching device motor 7, which can be driven to rotate by the switching device motor 7. In the disc body, four symm...

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Abstract

The invention discloses an automatic calibration method of a water quality monitoring system with adoption of an ultraviolet absorption method. The automatic calibration method is characterized in that a standard solution colorimetric cuvette switching device is designed and installed on a measurement optical path so that multipoint calibration can be performed within the measuring range of the system, and corresponding algorithms are adopted in a processor to determine a coefficient of correction in order to realize automatic calibration. The method has the advantage of saving a large amountof manual operation, improving the accuracy and practicability of the system and providing technical support for long-term online monitoring of water pollution. In a standard solution comparison experiment, the relative standard deviation is not more than 1% and the maximum relative error is not more than 2%, thus relevant national standards are accorded with.

Description

technical field [0001] The invention relates to an automatic calibration method for an ultraviolet absorption method water quality monitoring system, belonging to the technical field of environmental monitoring. Background technique [0002] At present, with the development of various undertakings in our country, the problem of water pollution is becoming more and more serious. The main indicators of organic matter in water that routinely need to be monitored are: dissolved organic carbon (DOC), total organic carbon (TOC), chemical oxygen demand (COD), ultraviolet absorption coefficient (SAC) and other indicators. [0003] Since the 1960s, European and American countries have begun to carry out research on the measurement of organic matter concentration by ultraviolet absorption method: in Europe, in 1962, Garnett and Cox designed and developed an instrument that uses ultraviolet light to monitor the concentration of organic matter in phenolic sewage. In 1966, Bramer, Walsc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33G01N21/03
Inventor 刘文清程寅刘建国张玉钧陆亦怀赵南京王亚平方武
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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