Test paper for detecting total basicity of water and its prepn process

A technology for detecting test paper and total alkalinity, which is applied in the direction of analyzing materials through chemical reactions, material analysis through observation of the impact on chemical indicators, and analysis using chemical indicators, so as to save production costs, be easy to carry, Effects that are easy to control in real time

Inactive Publication Date: 2003-06-04
上海三爱思试剂有限公司
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  • Abstract
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Problems solved by technology

[0002] Total Alkalinity represents the CO in water 3 2- Ions and HCO 3 - The sum of the ions shows the buffer capacity in water. The prior art is the method of acid-base titration, which must have the investment of laboratories, analysts, various instruments and equipment

Method used

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Examples

Experimental program
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Embodiment Construction

[0010] Production process: Use polystyrene sheet or cardboard with extremely poor water absorption as the substrate, and stick test paper with testing function on the front end. The test paper is obtained by immersing the chromatographic paper with excellent water absorption in the impregnating solution, taking it out and drying it.

[0011] Preparation of impregnation solution: bromothymol blue is dissolved in ethanol aqueous solution at a concentration of 0.01 to 0.10 g / liter, and the ratio of ethanol aqueous solution is ethanol: water is equal to 1:1 to 1:2 (weight ratio), and then the impregnation is adjusted with NaOH The pH of the solution is 4-7.

[0012] Preparation of test paper: Take chromatographic paper with excellent water absorption and immerse in the impregnating solution, take it out after half a minute, put it in a drying oven and dry it at 30-65°C, cut the obtained dry test paper into small pieces of 0.09-1 square centimeters and paste it on on the substrate....

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Abstract

The present invention is test paper for detecting total bsicity of water and its preparation process. The test paper includes base and color developing test paper sheet on front end of the base. The test paper sheet has been soaked in mixed alcohol-water solution of bromothymol blue of 0.01-0.1 g / L concentration. Using only one piece of the test paper can measure the total basicity of water, thatis the sum of carbonate radical ion and bicarbonate radical ion. Being simple and fast, the present invention is suitable for test of surface ground water, underground water, industrial effluent, etc.

Description

technical field [0001] The invention relates to a test paper for rapid detection of total alkalinity in water and a preparation method. Background technique [0002] Total Alkalinity represents the CO in water 3 2- Ions and HCO 3 - The sum of ions shows the buffer capacity in water. The prior art adopts the method of acid-base titration, which must have the investment of laboratories, analysts, various instruments and equipment. Contents of the invention [0003] The purpose of the present invention is to provide a test paper for testing the total alkalinity of water quality, which can quickly detect the total alkalinity in water samples without special equipment and special personnel. [0004] The test paper for total alkalinity detection in water of the present invention comprises a substrate and a color-developing test paper block with a testing function pasted on the front end of the substrate, the test paper block is impregnated with an alcohol-water mixed solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80G01N31/22
Inventor 戴丽冰顾慧莲
Owner 上海三爱思试剂有限公司
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