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On-line rapid determination system for high-content phosphorus

A rapid determination and high content technology, applied in the field of online analysis and monitoring in the industry, can solve the problems of complex system structure, harsh control conditions, the need to keep the temperature of the heater at 110°C, and the temperature of the cooler at 23°C, etc. , to achieve the effects of low detection cost, guaranteed accuracy, and improved concentration range

Inactive Publication Date: 2011-11-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since water samples need to be digested under high temperature and high pressure, the system structure is more complex and the control conditions are more stringent. It is necessary to set up heaters, coolers, and up to four switching valves, etc., and the system pressure must be kept at 0.75MPa. The temperature of the heater needs to be kept at 110°C, and the temperature of the cooler needs to be kept at 23°C; even so, the final analysis error of the system is as high as 5%, and the measured P 2 o 5 The concentration range is only within 10ppm

Method used

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  • On-line rapid determination system for high-content phosphorus
  • On-line rapid determination system for high-content phosphorus
  • On-line rapid determination system for high-content phosphorus

Examples

Experimental program
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Embodiment 1

[0037] The system of this embodiment is composed of a diluter 1, a sample injector 2, a color developer storage bottle R, a constant temperature reactor 3 and a detector 4. The injector 2 is connected to the constant temperature reactor 3 and the detector 4 in turn through the delivery pipeline, such as figure 1 shown.

[0038] Among them, diluter 1 is composed of deionized water pump P1, test solution pump P2, three-way mixing tube V1, dilution tube L1 and three-way sampling tube V2; injector 2 is composed of two dual-channel peristaltic pumps P3, P4 and The eight-channel switching valve V3 is composed; the constant temperature reactor 3 is composed of the flow path combination reaction block V4, the reaction tube L2 and the constant temperature water bath S; the detector 4 is composed of a spectrophotometer with a flow cell V5 and a data output interface (USB 2.0) Composition of B1 and computer B2 with analysis and display software, see figure 2 . The delivery pipelines ...

Embodiment 2

[0050] The system of this embodiment is also composed of a diluter 1, a sample injector 2, a color developer storage bottle R, a constant temperature reactor 3, and a detector 4. The injector 2 is connected to the constant temperature reactor 3 and the detector 4 in turn through the delivery pipeline, such as figure 1 shown.

[0051]Among them, diluter 1 is composed of deionized water pump P1, test solution pump P2, three-way mixing tube V1, dilution tube L1 and three-way sampling tube V2; injector 2 is composed of two dual-channel peristaltic pumps P3, P4 and Composed of eight-channel switching valve V3; constant temperature reactor 3 is composed of flow path combination reaction block V4, reaction tube L2 and constant temperature water bath S; detector 4 is a spectrophotometer with flow cell V5 and data output interface (USB 2.0) B1 and computer B2 with analysis display software, see Figure 4 . The delivery pipelines between them and the connecting pipes with deionized w...

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Abstract

The invention discloses an on-line rapid determination system for high-content phosphorus, comprising a diluter (1), an injector (2), a color-developing agent storage bottle R, a constant-temperature reactor (3) and a detector ( 4). In the system, a sample solution is continuously diluted by the diluter (1); the flow path state in the system can be switched by using the injector (2) through a switching valve in a flowing injection manner to orderly finish the exchange and the flowing of deionized water and a color-developing agent; and by a mixed reaction of the color-developing agent with a diluted sample in the constant-temperature reactor (3,) the reacted solution flows through the detector 4 for determining the absorbency; and the concentration of P2O5 in the solution can be displayed, recorded and output. The invention has the advantages of simple structure, wide range for detecting the concentration of phosphate groups, rapid detection process and simple operation without being influenced by ambient temperature change, ensures the accuracy of determination analysis, improves the real-time property of monitoring and is especially suitable for on-line detection of sugar refinery, phosphorus chemical and other industries or rapid analysis of labs.

Description

technical field [0001] The invention belongs to the technical field of on-line analysis and monitoring of phosphorus content in industrial production, and specifically relates to a method for analyzing high-content phosphorus by flow injection and spectrophotometry. 2 o 5 The on-line rapid determination system is especially suitable for on-line analysis and monitoring in industries such as sugar refining and phosphorus chemical industry. Background technique [0002] Phosphoric acid is a very important raw material in industrial production, but if its content cannot be well controlled in the industrial production process, it will have a certain impact on the production efficiency of the enterprise and the ecological environment. For example, for the current sugar industry, in order to solve the problem of filter sludge pollution, a certain amount of phosphoric acid is generally added to the sucrose mixed juice as a clarifying agent, but the added P 2 o 5 If the concentrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 王辛龙付全军张志业钟本和傅玉信
Owner SICHUAN UNIV