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Water quality monitoring instrument and method

A water quality monitoring and instrument technology, applied in the field of total phosphorus and ammonia nitrogen water quality online monitoring instruments, can solve the problems of high cost, inability to simultaneously detect water quality total phosphorus concentration and ammonia nitrogen concentration online, and low efficiency, etc., to improve popularity, low cost and real-time The effect of prior monitoring

Inactive Publication Date: 2015-07-08
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a water quality monitoring instrument and monitoring method for solving the problems of high cost, low efficiency, and inability to simultaneously detect total phosphorus and ammonia nitrogen in the prior art. Problems in detecting total phosphorus concentration and ammonia nitrogen concentration in water quality

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  • Water quality monitoring instrument and method
  • Water quality monitoring instrument and method

Examples

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Effect test

Embodiment 1

[0077] Step 1, when detecting total phosphorus, heat the water sample to 110°C, irradiate it with ultraviolet light with a wavelength of 254nm for 40 minutes, wherein, the water sample contains organic phosphorus or / and polymeric phosphate, and add over Potassium sulfate solution, catalytic reduction of water samples into orthophosphate solution;

[0078] In step 2, the orthophosphate solution digested by ultraviolet light is sequentially added to an antimony potassium molybdate solution and an ascorbic acid solution to prepare a phosphomolybdenum blue solution;

[0079] Step 3, under the irradiation of the first light source 31, the absorbance value of the phosphomolybdenum blue solution in the color reaction is obtained, and the content of total phosphorus in the water sample is calculated according to the absorbance value and the pre-stored absorption spectrum colorimetric.

Embodiment 2

[0081] Step 1, when detecting total phosphorus, heat the water sample to 120°C, irradiate it with ultraviolet light with a wavelength of 254nm for 30 minutes, wherein the water sample contains organic phosphorus or / and polymeric phosphate, and add over Potassium sulfate solution, catalytic reduction of water samples into orthophosphate solution;

[0082] In step 2, the orthophosphate solution digested by ultraviolet light is sequentially added to an antimony potassium molybdate solution and an ascorbic acid solution to prepare a phosphomolybdenum blue solution;

[0083] Step 3, under the irradiation of the first light source 31, the absorbance value of the phosphomolybdenum blue solution in the color reaction is obtained, and the content of total phosphorus in the water sample is calculated according to the absorbance value and the pre-stored absorption spectrum colorimetric.

Embodiment 3

[0085] Step 1, when detecting total phosphorus, heat the water sample to 130°C, irradiate it with ultraviolet light with a wavelength of 254nm for 20 minutes, wherein the water sample contains organic phosphorus or / and polymeric phosphate, and add over Potassium sulfate solution, catalytic reduction of water samples into orthophosphate solution;

[0086] In step 2, the orthophosphate solution digested by ultraviolet light is sequentially added to an antimony potassium molybdate solution and an ascorbic acid solution to prepare a phosphomolybdenum blue solution;

[0087] Step 3, under the irradiation of the first light source 31, the absorbance value of the phosphomolybdenum blue solution in the color reaction is obtained, and the content of total phosphorus in the water sample is calculated according to the absorbance value and the pre-stored absorption spectrum colorimetric.

[0088] Among them, such as Figure 7 As shown, the ammonia nitrogen detection flow chart in the wat...

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Abstract

The invention provides a water quality monitoring instrument and a water quality monitoring method. The water quality monitoring instrument comprises a digestion system, a circulating system, a detection system, a control system and an upper computer system, wherein the digestion system is used for carrying out catalytic decomposition on water samples, and promoting reagent solutions to react with the water samples; the circulating system is used for providing reagent solutions and water samples required by spectral analysis, enabling orthophosphate to sequentially react with antimony potassium molybdate and ascorbic acids in the reagent solutions so as to obtain phosphomolybdenum blue solution, and enabling o-phthalaldehyde in the reagent solutions to react with ammonia nitrogen in the water samples so as to obtain an isoindole derivative solution; the detection system is used for respectively detecting the absorbance value of the phosphomolybdenum blue solution and the fluorescence value of the isoindole derivative solution; the control system is used for controlling the adding sequence of the reagent solutions in the circulating system, controlling the starting and stopping of the digestion system and the control system, and generating a corresponding detecting result according to the absorbance value and the fluorescence value; and the upper computer system is used for providing the input and display of man-machine interaction for operators. Through optimization design on an internal structure, the contents of ammonia nitrogen and total phosphorus in a water sample are simultaneously measured, thereby reducing the cost of water quality detection, and improving the efficiency of water quality monitoring.

Description

technical field [0001] The invention relates to the field of on-line detection of water quality in the environmental protection industry, in particular to an on-line water quality monitoring instrument for total phosphorus, ammonium nitrogen and a method thereof. Background technique [0002] Phosphorus and nitrogen are the main nutrient elements of water bodies, and they are indicative elements of eutrophication in water environment. Total phosphorus refers to the total amount of phosphorus in various forms in water, including orthophosphate, condensed phosphate (pyrophosphate, metaphosphate and polyphosphate) and organically bound phosphorus. Ammonia nitrogen usually exists widely in water bodies as the decomposition product of nitrogen-containing organic matter, and exists in the form of ammonia or ammonium ions. Total phosphorus and ammonia nitrogen are important indicators reflecting the degree of pollution and eutrophication of water bodies. Eutrophication of water b...

Claims

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Application Information

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IPC IPC(8): G01N21/64G01N21/359
Inventor 黄昱曹海燕陈猷鹏汤冬云郭劲松
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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