Method for measuring concentration of liquid phase ozone by mode of oxidizing floating injected ozone

A technology of ozone oxidation and flow injection, applied in the field of environmental chemical monitoring, can solve the problems of difficult operation and low accuracy

Inactive Publication Date: 2007-07-25
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0003] The invention provides a method for measuring liquid-phase ozone concentration by means of flow injection ozone oxidation, which can solve the problems in the prior art that the accuracy is low, skilled technicians are required to operate, and the operation is difficult.

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  • Method for measuring concentration of liquid phase ozone by mode of oxidizing floating injected ozone

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Embodiment Construction

[0025] Method of the present invention comprises the following steps:

[0026] (1). The measured water sample-ozone solution produced by the ozone generator is delivered by the peristaltic pump 2 at a flow rate of 0.05ml / min.

[0027] (2). After the ozone solution flows through a section of the pipeline under the action of the peristaltic pump 2, it is first mixed with the sodium bicarbonate solution delivered by the peristaltic pump 3. The sodium bicarbonate rapidly consumes the remaining hydroxyl radicals in the solution as a capture agent for hydroxyl radicals. Because hydroxyl radicals can oxidize luminol to produce chemiluminescence, which interferes with ozone oxidation of luminol. The flow rate of sodium bicarbonate solution is 0.5ml / min, and the concentration is 0.2mol / L;

[0028] (3). The ozone solution mixed with sodium bicarbonate continues to flow in the pipeline, and the luminol solution and cobalt ions (Co 2+ ) solutions are mixed and flow through the detection...

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Abstract

A method for measuring concentration of liquid-phase ozone by utilizing flow injection mode calculates out ozone concentration in flow injection solution by detecting chemical luminous intensity generated by reacting on ozone in flow injection solution with luminal.

Description

technical field [0001] The invention belongs to the technical field of environmental chemical monitoring, specifically based on the phenomenon that luminol can be oxidized by ozone to produce chemiluminescence, using flow injection technology to produce chemiluminescence through blank solution and measured water sample-ozone solution A method of measuring the concentration of ozone in the liquid phase by the difference in intensity. Background technique [0002] The wide application of ozone generators makes the liquid phase ozone concentration (DO 3 ) measurement is very important. At present, the commonly used methods include iodometric method, ultraviolet spectrophotometric method and indigo method, and they have their own advantages and disadvantages. For example, the iodometric method has high detection sensitivity, but most of the coexisting oxidants interfere, and the reaction chemical dosage is controversial; the ultraviolet spectrophotometric method has high detec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N31/00
Inventor 王军成刘岩孙继昌侯广利程广欣杜立彬尤小华
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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