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System of detecting contents of nitrite, ammonia-nitrogen, sulfur phosphate in water based on camera

A nitrite and camera technology, which is used in measurement devices, material analysis and instruments by observing the impact on chemical indicators, can solve the problems of short sensor life, high measurement cost, complicated operation, etc., and achieve broad application prospects. , Simple operation and cost reduction effect

Inactive Publication Date: 2018-05-22
HUAIBEI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrochemical method has high sensitivity and can be monitored online, but the life of the sensor is short, the operation is complicated, and the measurement cost is high

Method used

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  • System of detecting contents of nitrite, ammonia-nitrogen, sulfur phosphate in water based on camera
  • System of detecting contents of nitrite, ammonia-nitrogen, sulfur phosphate in water based on camera
  • System of detecting contents of nitrite, ammonia-nitrogen, sulfur phosphate in water based on camera

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] To detect the content of ammonia nitrogen in the water, the pre-treatment method is to use Nessler's reagent color method (GB / T7479-87), in the form of free ammonia or ammonium ions, ammonium nitrogen reacts with Nessler's reagent to form a yellow-brown complex The chromaticity of the complex is directly proportional to the content of ammonium nitrogen (if the sample contains suspended solids, residual chlorine, calcium and magnesium and other metal ions, sulfides, and organics, the contrast color measurement will interfere, and pretreatment is required), Select different concentrations of ammonia nitrogen compounds for experiments, detect the image data of different concentrations of solutions in the sample pool, and convert them into Lab color model data to obtain data at different concentrations. The specific data are shown in Table 1:

[0028] Table 1 Concentration of ammonia nitrogen compounds and Lab color model data table

[0029]

[0030] Taking the color difference ...

Embodiment 2

[0032] To detect the content of nitrite in the water, the pre-treatment method is to use the hydrochloric acid α-naphthylamine method (DZ / T0064.60—1993). In an acid solution, nitrite can diazotize to aminobenzenesulfonamide After the reaction, it reacts with α-naphthylamine hydrochloride to produce a purple-red azo dye, select different concentrations of nitrite compounds for experiments, detect the image data of different concentrations of solutions in the sample pool, and convert them into Lab color models Data, the Lab color model data under different concentrations are obtained. The specific data are shown in Table 2:

[0033] Table 2 The concentration of nitrite and Lab color model data table

[0034]

[0035] Taking the color difference value cv as the ordinate (y) and the concentration of the nitrite compound as the abscissa (x), the above data is fitted by data (such as image 3 ) To obtain the standard curve between the concentration of nitrite compound and the color diffe...

Embodiment 3

[0037] Detect the content of phosphate in water. The pre-treatment method is based on the principle of ammonium molybdate-Vc color method (GB / T11893-1989). Under neutral conditions, it is digested with potassium persulfate to oxidize all the phosphorus. It is orthophosphate. In an acidic medium, orthophosphate reacts with ammonium molybdate to generate phosphomolybdenum polyheteric acid in the presence of salt transfer, which is immediately reduced by ascorbic acid to form a blue complex. Choose different concentrations of phosphate compounds Perform experiments to detect the image data of solutions of different concentrations in the sample pool, and convert them into Lab color model data to obtain Lab color model data at different concentrations. The specific data are shown in Table 3:

[0038] Table 3 Concentrations of phosphate compounds and Lab color model data table

[0039]

[0040] Taking the color difference value cv as the ordinate (y) and the concentration of the phosphat...

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Abstract

The invention discloses a system of detecting contents of nitrite, ammonia-nitrogen, sulfur and phosphate in water based on a camera. The system comprises an acquisition end, a treatment end and a display end, wherein the acquisition end comprises a light source system, a sample cell and the camera; a control chip of the camera is in data connection with the treatment end; and the treatment end isin data connection with the display end. According to the system, the ordinary camera is used for substituting a spectrophotometer for data acquisition; the color strength of a colored matter solution is determined according to a color difference between the solution and a blank sample; image data obtained by the acquisition end is RGB (red, green and blue) color model data; the treatment end converts the RGB color model data into Lab color model data; a color difference value is calculated according to the Lab color model data; a relation curve between the color difference value and a concentration of a detection object is established for measuring a solution with an unknown concentration; and the system is ingenious in design, adopts universal image acquisition equipment, integrates a graphic processing technology and data processing capability of a computer and can be widely applied.

Description

Technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a system for detecting the content of nitrite, ammonia nitrogen, sulfur and phosphate in water based on a camera. Background technique [0002] In the treatment and detection of increasingly serious water environment pollution, the detection of nitrite, ammonia nitrogen, sulfur, and phosphate plays an important role, and is also an important basis for correct judgment and evaluation of the results of water environment evaluation and comprehensive utilization of wastewater. In water quality testing, instruments are generally used to analyze substances in water. It is a common method in water quality analysis. It is an analysis method based on the physical or chemical properties of substances in water. Commonly used instrumental analysis methods include electrochemical analysis and spectrophotometry. , Chromatography and Colorimetry. The instrument method is easy to us...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/84
CPCG01N21/78G01N21/84
Inventor 刘升王馨刘飞
Owner HUAIBEI NORMAL UNIVERSITY
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