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O-chlorophenol concentration measuring method based on ultraviolet spectrum analysis

A technology of ultraviolet spectroscopy and o-chlorophenol, applied in the field of pollutant detection, can solve the problems of small detection range, high cost, and poor accuracy of electrochemical methods, and achieve the effect of large detection concentration range, simple operation, and high accuracy

Inactive Publication Date: 2020-09-04
HOHAI UNIV
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Problems solved by technology

The electrochemical method has poor precision, small detection range and complex operation, and the spectrophotometric and chromatography methods are cumbersome and costly. Therefore, ultraviolet spectroscopy with simple operation, low cost and high sensitivity has attracted attention.

Method used

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  • O-chlorophenol concentration measuring method based on ultraviolet spectrum analysis
  • O-chlorophenol concentration measuring method based on ultraviolet spectrum analysis
  • O-chlorophenol concentration measuring method based on ultraviolet spectrum analysis

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0020] Such as Figure 1-2 As shown, a kind of o-chlorophenol concentration measuring method based on ultraviolet spectroscopic analysis provided by the present invention comprises the following steps:

[0021] Step 1. Prepare standard solution: Take ortho-chlorophenol and add it to tap water to dissolve, and the concentrations are 7.25PPM, 12.25PPM, 22.25PPM, 32.25PPM, 42.25PPM, 52.25PPM, 62.25PPM, 72.25PPM, 92.25PPM, 117.25PPM standard solution;

[0022] Step 2. Obtain the ultraviolet spectrum of the standard solution by using the ultraviolet / visible spectrometer: use the UV-1700 ultraviolet / visible spectrometer to measure ten groups of standard solutions, and obtain the original spectrum as figure 2 As shown, the original spectrum is smoothed and preprocessed to obtain the required UV spectrum;

[0023] Step 3. Find the best detection wavelength: esta...

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Abstract

The invention discloses an o-chlorophenol concentration measurement method based on ultraviolet spectrum analysis. The method comprises the following steps: (1) preparing a standard solution; (2) obtaining an ultraviolet spectrum of the standard solution by using an ultraviolet / visible spectrograph; (3) finding the optimal detection wavelength; (4) establishing a standard curve for detecting the concentration of o-chlorophenol; and (5) detecting the concentration of the o-chlorophenol solution to be detected. The linear detection range of the method on o-chlorophenol is 7.25-117.25 PPM, and when the wavelength of ultraviolet light is 294.51 nm, the relationship between the transmittance of o-chlorophenol and the concentration of the solution is as follows: 1 / T(one of the transmittance)=0.01587*C(PPM)+0.97053, R2=0.99829, and the mean square error is 5.427*10<-4>. Meanwhile, compared with other methods, the detection method disclosed by the invention has the advantages of large detection range, high precision, no pollution and the like, and has a certain application prospect in o-chlorophenol concentration detection.

Description

technical field [0001] The invention belongs to the technical field of pollutant detection, and in particular relates to a method for measuring the concentration of o-chlorophenol based on ultraviolet spectrum analysis. Background technique [0002] Chlorophenol compounds are important chemical raw materials in the industrial field, widely used in the synthesis of medicines and pesticides, the processing and manufacturing of plastics, the preparation of insecticides, herbicides, fungicides and dyes, etc. Chlorophenols are widely used in industry and have a large production volume. The presence of chlorophenols can be detected in industrial waste and domestic wastewater. Chlorophenols are found in the wastes of chemical plants that produce monochlorophenol and dichlorophenol higher concentration. Most chlorophenol compounds are highly toxic, difficult to biodegrade, have carcinogenic, teratogenic, mutagenic effects and genotoxicity, remain in the environment for a long time,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/33G01N1/38
CPCG01N1/38G01N21/33
Inventor 张开骁董旭张爱梅邹华
Owner HOHAI UNIV
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