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A rapid detection method of total phosphorus content in water body

A detection method and phosphorus content technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems such as easy to produce large errors, achieve the effect of reducing the detection limit, simple investment, and avoiding secondary pollution

Active Publication Date: 2021-08-03
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 201610614968.2 (a total nitrogen and total phosphorus monitoring system and monitoring method in water body) uses a water sample digestion device for digestion reaction, and then uses the color reaction of the chromogenic agent combined with the spectrophotometer for detection. The sample volume of the chromogenic agent needs to be Use a small peristaltic pump for precise control, when the total phosphorus content is very low (the national standard limit is 0.4mg / L), it is easy to produce large errors

Method used

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  • A rapid detection method of total phosphorus content in water body
  • A rapid detection method of total phosphorus content in water body
  • A rapid detection method of total phosphorus content in water body

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Embodiment 1

[0066] This embodiment provides a method for rapid detection of total phosphorus in water, which specifically includes the following steps:

[0067] (1) Construction of detection model:

[0068] Configure standard samples, take pure water, KH 2 PO 4 Mix and prepare P element concentrations of 0mg / L, 0.5mg / L, 1mg / L, 2mg / L, 3mg / L as standard samples, 500ml each.

[0069] Use an electronic balance to accurately weigh 50 mg of ECA23 strong base anion exchange resin, put it into the prepared standard sample respectively, place the obtained mixed solution container on a decolorizing shaker, set the shaker working time for 30 minutes, and rotate at a speed of 200 rpm. The ion-exchanged water and the water sample to be tested are fully contacted and mixed to achieve full exchange with the phosphate in the standard sample.

[0070] After shaking, use a small filter to filter out the ion exchange resin and dry it. The drying process can be air-dried naturally or quickly dried in an o...

Embodiment 2

[0077] This embodiment provides a method for rapid detection of total phosphorus in water, which specifically includes the following steps:

[0078] (1) Construction of detection model:

[0079] Configure standard samples, take pure water, KH 2 PO 4 Mix and prepare P element concentrations of 0mg / L, 0.5mg / L, 1.5mg / L, 2.5mg / L, 3.5mg / L as standard samples, 500ml each.

[0080] Use an electronic balance to accurately weigh 50 mg of ECA23 strong base anion exchange resin, put it into the prepared standard sample respectively, place the obtained mixed solution container on a decolorizing shaker, set the shaker working time for 30 minutes, and rotate at a speed of 200 rpm. The ion-exchanged water and the water sample to be tested are fully contacted and mixed to achieve full exchange with the phosphate in the standard sample.

[0081] After shaking, use a small filter to filter out the ion exchange resin and dry it. The drying process can be air-dried naturally or quickly dried i...

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Abstract

The invention relates to the field of water body detection, in particular to a rapid detection method for total phosphorus content in water body. Specifically, the detection method is realized by taking the water sample to be tested as the detection object, using the strongly basic anion resin as the enrichment matrix, and using Fourier transform infrared spectrum detection. The advantages of the method and system of the present invention compared with the comparative technology are: (1) simple input and mixing operation, simplifies the operation process, reduces the complexity of the system, and does not require professionals; (2) the cost of the resin enriched matrix material is low , commonly used ion exchange resins for water purification, can be regenerated and reused to avoid secondary pollution; (3) Increase the total phosphorus density in the unit detection unit by ion exchange resin enrichment, thereby reducing the detection limit of total phosphorus , to realize the identification and detection of low concentration of total phosphorus, and the method can be used for quantitative and rapid monitoring and early warning of surface water pollution.

Description

technical field [0001] The invention relates to the field of water body detection, in particular to a rapid detection method for total phosphorus content in water body. Background technique [0002] Phosphorus is one of the important elements for the survival of aquatic organisms. An appropriate amount of phosphorus can promote the normal growth of organisms. If the phosphorus content in the water is too high, it will cause algae and other microorganisms to multiply rapidly and consume a large amount of dissolved oxygen in the water. Causes a large number of aquatic animals such as fish to die, that is, water body eutrophication. The growth of algae caused by eutrophication will also increase the algae toxins in the water body, seriously threatening water security. Excess phosphorus in water mainly comes from agricultural wastewater and domestic sewage, especially domestic detergents, pesticides, and chemical fertilizers. The total phosphorus content is also listed as one ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/3577
Inventor 田宏武董大明矫雷子赵贤德邢振李传霞李文龙
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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