Test paper for detecting disinfector of chlorine dioxide, and preparation method

Abstract

The invention provides a test paper for detecting the chlorine dioxide content of the chlorine dioxide aqueous solution disinfectant and the preparing method thereof. And the test paper is a chromatographic filter paper dipped with an aqueous solution mixed of starch 5-19 wt%, potassium iodide 2-5 wt%, color food additive polyvinyl alcohol 0.1-0.5 wt% and sodium carbonate 0.1-0.2 wt%, where the dipping solution is at 10-25 deg.C, the filter paper is dipped 5-10 s and then taken out, dried by hot air flow at 85 deg.C-95 deg.C, and cut into 0.5-0.7 cm wide strips to be put in a square box with a paper drawing outlet. The testing range of the test paper is 0-1000 mg / L and it has the characters: quick, accurate, safe and nontoxic.

Description

technical field [0001] The invention relates to a test paper for rapid detection of chlorine dioxide content in a chlorine dioxide aqueous solution disinfectant and a preparation method thereof. Background technique [0002] In recent years, the popularization and application of chlorine dioxide disinfectant has been accelerated. At present, the disinfectants commonly used in hospitals, food industry and drinking water mainly include ozone, liquid chlorine, chlorine dioxide and chloramine. Ozone is a strong oxidizing agent and does not produce harmful and toxic substances after disinfection. It is an excellent disinfectant, but it is expensive and inconvenient to use. Liquid chlorine is currently the most widely used, but it will form toxic and harmful organic halides with organic matter in water, and its potential harm has become an indisputable fact. The disinfection effect of chlorine dioxide is only second to that of ozone, and its toxicity is safer when the residual a...

AI Technical Summary

Problems solved by technology

Ozone is a strong oxidant, no harmful and toxic substances will be produced after disinfection, it is an excellent disinfectant, but it is more expensive and inconvenient to use

Liquid chlorine is currently the most widely used, but it will form toxic and harmful organic halides with organic matter in water, and its potential harm has become an indisputable fact

The disinfection effect of chlorine dioxide is second only to ozone, and its toxicity is safer when the residual amount is low, while the disinfection effect of chloramine is the worst, and it cannot completely solve the problem of organic chloride production

[0003] None of the existing available chlorine test papers is suitable for testing ClO in the concentration range of 5-1000mg / L 2 , such as the chlorine test paper produced by Shanghai Sanaisi Reagent Co., Ltd. is applied to ClO 2 Sensitivity is low during test, and the color development of low concentration range is very light, and it is difficult to make color scale, and the available chlorine test paper of Chinese patent CN87102722 application, although it is also potassium iodide test paper, its test range is in the high concentration range of liquid chlorine, and it is used in testing In ClO2 solution, the sensitivity is not high enough, and the stability is poor, and the test paper is easy to change color

Another example is in the Chinese patent CN1055240, the available chlorine test paper announced, the sensitivity is not high enough in use, and the color development is light.