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High-acidity precision test paper

It is an acidity and precision technology, which is applied in the direction of analyzing materials through chemical reactions and observing the influence of chemical indicators. It can solve the problems of not being able to detect the concentration of hydrogen ions in high-acidity solutions and achieve expanded detection. range effect

Inactive Publication Date: 2012-07-04
LIAONING NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, there is no test paper that can detect the concentration of hydrogen ions in highly acidic solutions (that is, the concentration of hydrogen ions is greater than 0.1mol / L)

Method used

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Examples

Experimental program
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Embodiment 1

[0020] Prepare test strips:

[0021] ①Immerse a filter paper with a length of 5 cm and a width of 1 cm in a 2% cetyltrimethylammonium bromide aqueous solution by mass for 1 hour, and dry it at 25°C;

[0022] ② Immerse in 0.39% brilliant blue reagent aqueous solution for 10 minutes, and dry at 25°C;

[0023] ③Elute the attachment with distilled water and dry at 25°C to obtain the test strip;

[0024] Prepare a standard color chart:

[0025] ① Put the test strips prepared above at hydrogen ion concentrations of 0.1mol / L, 1mol / L, 2mol / L, 3mol / L, 4mol / L, 5mol / L, 6mol / L, 7mol / L, 8mol / L Immerse in the reagent solution of L, 9mol / L;

[0026] ②Take pictures and record.

[0027] When the high acidity precision test paper prepared in this example is in use, drip the solution to be tested on the test paper strip of the high acidity precision test paper, observe the color of the test paper strip, and compare it with the standard color card of the high acidity precision test paper , t...

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Abstract

The invention provides high-acidity precision test paper which comprises a test strip and a standard colorimetric card, wherein the test strip is prepared by soaking filter paper in 0.5-4% by weight of an aqueous solution of cetyltrimethylammonium bromide and 0.1-2% by weight of an aqueous solution of brilliant blue reagent, and the standard colorimetric card is prepared by soaking ten test strips in reagent solutions with different hydrogen ion concentrations respectively. Accordingly, the high-acidity precision test paper is suitable for semiquantitatively detect hydrogen ion concentration of a colorless or light-color high-acidity solution, and the concentration of hydrogen ions in the to-be-tested solution is required to be within the range of 0.1 moL / L to 9 moL / L. The invention effectively increases the detection range of pH precision test paper in the prior art, and fills the blank of test paper for rapidly detecting hydrogen ion concentration of high-acidity solutions.

Description

technical field [0001] The invention relates to a precision test paper, in particular to a precision test paper for testing high acidity. Background technique [0002] Among the various test methods for solution acidity, the test paper test method is the most rapid, convenient and economical semi-quantitative or qualitative test method. Commercially available semi-quantitative pH test paper is divided into extensive test paper and precision test paper. pH wide test paper is suitable for hydrogen ion concentration of 1×10 -1 mol / L, 1×10 -2 mol / L~1×10 -14 The test of the acidity of the solution in the mol / L interval is expressed by pH 1 to 14, and the acidity of the solution with a difference of 10 times in hydrogen ion concentration can be distinguished. When the acidity of the solution exceeds the above range of hydrogen ion concentration, the pH wide test paper can only be used for qualitative detection, that is, when the acidity of the solution is higher than 1×10 -1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 赫春香王微霍春宝
Owner LIAONING NORMAL UNIVERSITY