Test paper for detecting solution PH value

A technology for detecting test paper and pH, which is applied in the direction of material analysis by observing the influence on chemical indicators, and analysis by chemical reaction of materials, etc., to achieve the effects of good water absorption, lower production costs, and simple preparation process.

Inactive Publication Date: 2004-06-02
上海三爱思试剂有限公司
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It must have ordinary investment in laboratories, an

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  • Test paper for detecting solution PH value
  • Test paper for detecting solution PH value

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Embodiment Construction

[0034] Production process: The test paper is obtained by soaking the quantitative chromatographic base paper with good water absorption in the impregnation solution, taking it out and drying it.

[0035] Preparation of impregnation solution: Dissolve saponin, m-methyl red, bromocresol green, nitrate yellow, phenolphthalein, alizarin yellow R, and dadan yellow in ethanol aqueous solution at a concentration of 0.01-0.20 g / L. The proportioning ratio of the ethanol aqueous solution is ethanol:water=0.6:1.2~1:2.2. Then use NaOH solution to adjust the pH value of the soaking solution to 5-8.

[0036] Preparation of test paper: Take out the quantitative chromatography base paper with better water absorption and immerse it in the soaking solution, take it out after 5-10 seconds. It is obtained by drying in a drying oven at 70-100°C. The obtained dry test paper is cut into color test paper blocks with a width of 0.6-1 cm and a length of 5.5-6.5 cm.

[0037] Color card making: It wil...

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Abstract

The present invention is solution pH value detecting test paper and its preparation process. The test paper includes color developing test paper sheet with test function, and the test paper sheet is soaked in the mixed ethanol and water solution of soap yellow, methyl red, bromcresol green, nitrate nitrogen yellow, phenolphthalein, Alizarine Yellow and Dadan yellow. The mixed solution has pH value of 5-8. The test paper is used in testing the pH value of solution, or the concentration of hydrogen ion and hydroxide radical ion. It is suitable for various solution, including ground water, underground water, industrial waste water, etc.

Description

technical field [0001] The invention relates to a test paper for detecting the pH of a solution and a preparation method thereof. Background technique [0002] Acid and alkalinity represent the H in the solution + and OH - concentration of ions. It shows the strength of acid and alkali in the solution. In the prior art, the calibration of the indicator in the solution is used, the instantaneous change of the color of the indicator is used for testing, or the pH meter is used for measurement. It must have ordinary investment in laboratories, analysts and various instruments and testing equipment. [0003] pH principle: H + The negative logarithm of the concentration is the pH of the solution. [0004] The use of pH test paper has advantages over common pH meter measurement: ①It only takes 5 seconds to use the test paper method, and the operation is relatively simple. ②Easy to carry ③Not restricted by environmental factors ④Real-time monitoring [0005] Commonly used a...

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Application Information

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IPC IPC(8): G01N21/80
Inventor 陈敏勇汪峻黄胜
Owner 上海三爱思试剂有限公司
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