Method for quickly identifying potassium hydrogen phthalate in surface water

A technology of potassium hydrogen phthalate and identification method, which is applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as rapid identification of potassium hydrogen phthalate that have not yet been developed, and save time and money cost effect

Inactive Publication Date: 2011-07-20
陕西衡伟信息技术有限公司
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Problems solved by technology

[0004] After searching the literature of the prior art, it is found that there is no literature report on the rapid identification of potassium hydrogen phthalate in surface water by using near-infrared spectroscopy

Method used

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  • Method for quickly identifying potassium hydrogen phthalate in surface water
  • Method for quickly identifying potassium hydrogen phthalate in surface water
  • Method for quickly identifying potassium hydrogen phthalate in surface water

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Embodiment Construction

[0032] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] The rapid identification method of potassium hydrogen phthalate in surface water of the present invention comprises the following steps:

[0034] Step 1, find out the characteristic absorption peak wavelength value that can identify the potassium hydrogen phthalate composition in the aqueous solution by screening and verifying the characteristic absorption peaks of the potassium hydrogen phthalate aqueous solution of several different concentrations; Wherein, described screening Including the following steps:

[0035] Step 1.1, collect a series of near-infrared spectra of pure aqueous solution, according to the formula:

[0036]

[0037] After the average processing, the near-infrared spectrum standard data of pure water is obtained, such as figure 2 shown. In this formula, n represents the number of near-infrare...

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Abstract

The invention discloses a method for quickly identifying potassium hydrogen phthalate in surface water, which comprises the following steps: 1) screening characteristic absorption peaks of potassium hydrogen phthalate aqueous solutions having different concentrations to find out the wavelength value of the characteristic absorption peak of the potassium hydrogen phthalate; 2) collecting an unknown surface water sample of an upper-layer non-sedimentation part which is subjected to natural sedimentation treatment; 3) filtering; 4) carrying out infrared spectrum scanning; 5) sequentially carrying out division, smoothing and first-order derivative treatment on the original spectrum data of the collected unknown surface water sample acquired in the step 4) and standard near infrared spectrum data of pure water, thus acquiring a treated near infrared spectrum chart; and 6) judging if the unknown surface water is a potassium hydrogen phthalate aqueous solution. By using the analysis method provided by the invention, the detection process can be finished by simply detecting the near infrared spectrum of the unknown surface water subjected to the sedimentation and filtration pretreatment without using other auxiliary instruments and agents. Besides, the method has the advantages of high flexibility and short detection process.

Description

technical field [0001] The invention relates to a rapid identification and detection method in the field of analytical chemistry, in particular to a rapid identification method for potassium hydrogen phthalate in surface water. Background technique [0002] Water is one of the important resources for human life and survival. Water pollution and water quality degradation caused by current social and economic development have become one of our most important environmental problems. In 1989, a survey on the protection of 81 drinking water surface water sources in 49 key cities for environmental protection in the country showed that 48% of the surface water sources did not meet the corresponding standards; the survey results in 1996 showed that 329 drinking water sources in 204 In surface water sources, this figure has risen to 83.3%. [0003] Potassium hydrogen phthalate is often used as a standard substance for chemical oxygen demand because of its stable chemical properties....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3577G01N21/359
Inventor 黄欣贾瑞宝孙韶华马中雨
Owner 陕西衡伟信息技术有限公司
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