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Quick detecting method of water body total phosphorus content

A detection method and technology for phosphorus content, which are used in measuring devices, material analysis by optical means, instruments, etc., can solve problems such as easy generation of large errors, and achieve the effects of improving applicability, simplifying operation procedures, and strong detection ability.

Active Publication Date: 2019-06-14
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 amount of the chromogenic agent requires 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

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  • Quick detecting method of water body total phosphorus content
  • Quick detecting method of water body total phosphorus content
  • Quick detecting method of water body total phosphorus content

Examples

Experimental program
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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 detecting, in particular to a quick detecting method of the water body total phosphorus content. Specially, the detecting method is realized by considering a to-be-detected water sample as a detected object and strong basicity anion resin as an enrichment substrate, and using Fourier transform infrared spectroscopy. Compared with the prior art the quick detecting method of the water body total phosphorus content and a system have the advantages that (1) input is simple,and mixing operation is easy, operating procedures are simplified, the complex rate of the system is decreased, and professional staff are not needed; (2) the resin serving as a material of the enrichment substrate is low in cost, is frequently-used water purifying ion-exchange resin, and can be resolved and regenerated to be recycled, and secondary pollution is avoided; and (3) the total phosphorus density in unit detecting units is increased by an ion-exchange resin enrichment way, so that the detecting limit of total phosphorus is reduced, the total phosphorous low concentration is identified and detected, and the method can be used for quantification quick 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 Applications(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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