PH test paper for water quality testing and water quality testing method

A technology of water quality detection and ph test paper, which is applied in the direction of analyzing materials through chemical reactions and material analysis through observing the influence of chemical indicators, can solve the problems of limited range, accuracy and sensitivity of pH detection, and achieve Wide detection range, accurate detection results and high detection sensitivity

Inactive Publication Date: 2018-05-25
SHANGHAI HONGBAO GREEN AQUATIC PROD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pH detection range, accuracy and sensitivity of this detection test paper are also relatively limited

Method used

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  • PH test paper for water quality testing and water quality testing method

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Comparison scheme
Effect test

Embodiment 1

[0029] The invention relates to a pH test paper for water quality detection, which is prepared by impregnating a pH color developing reagent on a carrier, and then drying at 55 DEG C for 20 minutes. The pH chromogenic reagent is a phenol red solution with a concentration of 0.8 g / L; the detection range of the pH test paper is pH4.0-10.0. The carrier is a chromatography test strip made of absorbent paper H-5076.

[0030] Select the pH test paper (phenol red pH test paper) impregnated with the above-mentioned phenol red solution to detect the pH value of acidic or alkaline water.

[0031] The water quality detection method using the above-mentioned pH test paper for water quality detection is as follows: the color displayed after the above-mentioned pH test paper for water quality detection is in contact with the water sample to be tested for 5 minutes is compared with the standard color chart to obtain the pH value of the water sample to be tested.

Embodiment 2

[0033] The invention relates to a pH test paper for water quality detection, which is prepared by impregnating a pH color developing reagent on a carrier, and then drying at 55 DEG C for 20 minutes. The pH chromogenic reagent is bromothymol blue solution with a concentration of 0.8 g / L; the detection range of the pH test paper is pH 6.0-10.0. The carrier is a chromatography test strip made of absorbent paper H-5076.

[0034] The pH test paper (bromothymol blue pH test paper) impregnated with the above-mentioned bromothymol blue solution can be used to detect the pH value of neutral and alkaline water.

[0035] The water quality detection method using the above-mentioned pH test paper for water quality detection is as follows: the color displayed after the above-mentioned pH test paper for water quality detection is in contact with the water sample to be tested for 5 minutes is compared with the standard color chart to obtain the pH value of the water sample to be tested.

Embodiment 3

[0037] The invention relates to a pH test paper for water quality detection, which is prepared by impregnating a pH color developing reagent on a carrier, and then drying at 55 DEG C for 20 minutes. The pH chromogenic reagent is bromocresol green solution with a concentration of 0.6 g / L; the detection range of the pH test paper is pH 4.0-6.0. The carrier is a chromatography test strip made of absorbent paper H-5076.

[0038] The pH test paper (bromocresol green pH test paper) impregnated with the above-mentioned bromocresol green solution can be used to detect the pH value of acidic water.

[0039] The water quality detection method using the above-mentioned pH test paper for water quality detection is as follows: the color displayed after the above-mentioned pH test paper for water quality detection is in contact with the water sample to be tested for 5 minutes is compared with the standard color chart to obtain the pH value of the water sample to be tested.

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Abstract

The invention discloses pH test paper for water quality testing and a water quality testing method. The pH test paper for water quality testing is prepared by soaking a carrier in a pH color-developing reagent, and drying at 50 to 60 DEG C for 10 to 40 minutes, wherein the pH color-developing reagent is a bromine thymol blue solution with the concentration being 0.7 to 0.8g/L, a phenol red solution with the concentration being 0.7 to 0.8g/L, or a bromocresol green solution with the concentration being 0.5 to 0.6g/L; the carrier is a chromatography test strip or chromatography filter paper. According to the pH test paper for water quality testing and the water quality testing method provided by the invention, pH of water quality can be quickly, conveniently and accurately detected without the need for using a special instrument, so that a detection range is wide; a bromine thymol blue and phenol red indicator developing in an alkaline zone but not developing in an acid zone is selectedfor detecting an alkaline part, and a bromocresol green indicator developing in the acid zone but not developing in the alkaline zone is selected for detecting an acid part, so that a detection resultis more accurate; phenol red pH test paper prepared by a color-developing reagent phenol red can be also used for carrying out quantitive pH detection.

Description

technical field [0001] The invention belongs to the technical field of water quality detection, in particular to a pH test paper for water quality detection and a water quality detection method. Background technique [0002] With the improvement of people's quality of life, water quality must be monitored in many fields such as drinking water, daily life water, and swimming place water. In water quality monitoring, pH test paper detection is the most convenient and commonly used. [0003] The application of pH test paper is very extensive and convenient. The reaction principle of pH test paper is based on the pH indicator method. Commonly used pH analysis test paper generally contains methyl red [pH4.2 (red) ~ 6.2 (yellow)], bromocresol green [pH3.6 (yellow) ~ 5.4 (green)], bromothymol blue [6.0 (yellow) ~ 7.6 (blue)], these mixed acid-base indicators can reflect the variation range of pH 4.5 ~ 9.0. This commonly used pH analysis test paper has limited detection range and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/80
CPCG01N21/80
Inventor 邹国忠
Owner SHANGHAI HONGBAO GREEN AQUATIC PROD CO LTD
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