CN1501072A - Test paper for detecting solution PH value - Google Patents
Test paper for detecting solution PH value Download PDFInfo
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- CN1501072A CN1501072A CNA021454787A CN02145478A CN1501072A CN 1501072 A CN1501072 A CN 1501072A CN A021454787 A CNA021454787 A CN A021454787A CN 02145478 A CN02145478 A CN 02145478A CN 1501072 A CN1501072 A CN 1501072A
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- test paper
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- yellow
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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
The present invention relates to a kind of test paper of detecting solution acid alkalinity and preparation method thereof that is used to.
Background technology
That acid, basicity are represented is H in the solution
+And OH
-The concentration of ion.What show is power sour, alkaline in the solution.Prior art adopts the demarcation of indicator in solution, utilizes the transient change of indicator color to test, or adopt that the pH instrument is measured etc.It must have the common investment of laboratory, analyst and various instrument detection device.
PH value principle: H
+The pH value of the negative logarithm ie in solution of concentration.
The use of pH test paper and pH instrument commonly used measurement have superior part: 1. only need 5 seconds time with test paper method, operate fairly simple.2. 4. the environmental factor that 3. is not subjected to easy to carry restricts monitoring in real time
Acid base indicator commonly used all is organic monoacid or organic weak base.When the pH value in the solution changed, the change of color took place in indicator owing to structural change.The equilibrium constant difference of various indicator, the color change interval difference of various indicator.The color change interval of indicator is explained that by the balance moving process of indicator in solution its balance moving process in solution can be represented (with HIn weak-type indicator) with following formula simply.
Reach the equilibrium constant that can calculate it after the balance:
Obviously, the transformation of indicator color depends on [In
-] and the ratio of [HIn].The ratio of both concentration is determined that by two factors one is=K
HInValue, another is the acidity [H of solution
+].K
HInBeing the dissociation constant of indicator, has been a constant for certain indicator, and it is by the decision of the essence of indicator.
When needs detect the pH value of solution, need the obvious and narrow indicator of color change interval of change color sometimes, promptly mixed indicator comprises the indicator that two or more are formulated in proportion.When the preparation mixed indicator, answer the ratio of the various components of strict control, otherwise change color will be not remarkable.
Summary of the invention
The object of the present invention is to provide the test paper of the quick test solution acid of a kind of energy, basicity.Acid, basicity in its energy fast detecting testing sample need not special equipment and special personnel.
The pH value scope that the acid that relates among the present invention, basicity detect test paper is pH1～14.This detection test paper has flooded the mixed solution of soap Huang 0.01～0.20 grams per liter, m-methyl red 0.01～0.20 grams per liter, bromcresol green 0.01～0.20 grams per liter, nitro-nitrogen yellow 0.01～0.20 grams per liter, phenolphthalein 0.01～0.20 grams per liter, alizarin yellow R 0.01～0.20 grams per liter, titan yellow 0.01～0.20 grams per liter, second alcohol and water.The pH value of this mixed solution equals 5～8.
That acid, alkali are represented in the solution is H in the solution
+And OH
-The activity of ion.Need come the pH value in the test solution or need accurate higher pH instrument by the method for titration with the indicator of certain sensitivity in the past, this just requires to possess the indicator and the common essential equipment of certain mass.The present invention is applied to principles such as acid, alkalimetric titration and detects on the test paper, promptly have on the quantitative body paper of certain separating property and adsorbing various acid, neutralization indicator, when touching the measured medium of certain acid, basicity, the potential of hydrogen of test paper is changed, and changing value difference is showed by the difference colour developing that is adsorbed on the various indicator on the body paper.In order to realize the change procedure of pH1～pH14, the present invention has selected the indicator in the following table for use.
The color range of indicator and color range among the present invention
| The indicator title | Transition interval (pH value) | The color range scope |
| The soap Huang | 1～2 | Red → Huang |
| M-methyl red | 2～4 | Red → Huang |
| Bromcresol green | 3～5 | Huang → indigo plant |
| Nitro-nitrogen yellow | 5～7 | Huang → indigo plant |
| Phenolphthalein | 7～10 | Colourless → red |
| Alizarin yellow R | 10～12 | Yellow → rose-red |
| Titan yellow | 12～14 | Yellow → red |
Colour developing indicator paper block width among the present invention is 0.6～1.0 centimetre, and length is 5.5～6.5 centimetres.
The water absorptivity of the quantitative chromatographic test paper of indicator paper block of the present invention is fine, can absorb enough fluids to be measured, makes acid, neutralization indicator have obvious color to change.Along with the variation of pH value of solution value, the detection test paper that is adsorbing various indicator is along with variable color.The pH value of the present invention's dipping is controlled at 5.0～8.0.
The preparation method that the present invention detects test paper comprises that the demonstration indicator paper block is flooded through maceration extract by quantitative chromatography body paper, takes out after 5～10 seconds, obtains through 70～100 ℃ of dryings in the drying case.The preparation of maceration extract is that soap Huang, m-methyl red, bromcresol green, nitro-nitrogen yellow, phenolphthalein, alizarin yellow R, each concentration with 0.01～0.20 grams per liter of titan yellow are dissolved in the ethanol water.The proportioning of ethanol water is an ethanol: water=0.6: 1.2～1: 2.2.PH value with NaOH solution adjusting maceration extract is 5～8 then.
Test paper of the present invention, acid, the basicity of energy test solution, H in the ie in solution
+And OH
-The concentration power of ion.Advantage with quick, easy, easy operation, portable and real-time control.It is applicable to the test of various solution acid, basicity, includes the mensuration of the water samples such as the day water, underground water and industrial waste water of certain surge capability, need not laboratory, professional test personnel and checkout equipment.Simple and direct, convenient, the saving production time of the preparation process of test paper of the present invention, reduced production cost.
The molecular formula of related indicator and structural formula among the present invention:
Yellow molecular formula: the C of soap
18H
14N
3NaO
3S
Structural formula:
M-methyl red molecular formula: C
15H
15N
3O
2
Structural formula:
Bromcresol green molecular formula: C
21H
14Br
4O
5S
Structural formula:
Nitro-nitrogen yellow molecular formula: C
16H
8N
4Na
2O
11S
2
Structural formula:
Phenolphthalein molecular formula: C
20H
14O
4
Structural formula:
Alizarin yellow R molecular formula: C
13H
8N
3NaO
5
Structural formula:
Titan yellow molecular formula: C
28H
19N
5Na
2O
6S
4
Structural formula:
Embodiment
Manufacturing process: after the quantitative chromatography body paper immersion maceration extract of test paper by good water absorption, take out dry back and obtain.
The preparation of maceration extract: soap Huang, m-methyl red, bromcresol green, nitro-nitrogen yellow, phenolphthalein, alizarin yellow R, each concentration with 0.01～0.20 grams per liter of titan yellow are dissolved in the ethanol water.The proportioning of ethanol water is an ethanol: water=0.6: 1.2～1: 2.2.PH value with NaOH solution adjusting maceration extract is 5～8 then.
The preparation of test paper: take out the quantitative preferably chromatography body paper of water absorptivity and immerse in the maceration extract, take out after 5～10 seconds.In drying box, obtain through 70～100 ℃ of dryings.It is 0.6～1 centimetre that the dry test paper that obtains is cut into width, and length is 5.5～6.5 centimetres colour developing indicator paper block.
Colour atla is made: will need with hydrochloric acid, potassium chloride (c=0.2 mol) preparation pH=1.0 and pH=2.0 standard solution.With HCl (c=0.1 mol); Potassium Hydrogen Phthalate c=0.2 mol preparation pH=3.0, pH=4.0 standard solution; With NaOH c=0.1 mol, potassium dihydrogen phosphate c=0.2 mol is mixed with the pH value and is respectively 6.0,7.0,8.0 standard solution; Be mixed with the pH value with NaOH c=0.1 mol, phosphoric acid c=0.4 mol, potassium chloride c=0.4 mol and be respectively 9.0,10.0 standard solution; Be mixed with the pH value with NaOH c=0.1 mol, aminoacetic acid c=0.2 mol, potassium chloride c=0.2 mol and be respectively 11.0,12.0,13.0 standard solution; Be mixed with the standard solution of pH=14.0 with NaOH c=0.1 mol.Test paper is immersed taking-up immediately in the above-mentioned standard solution respectively.Modulate colour atla according to the colour developing after 5 seconds.
Connect the above-mentioned preparing standard solution that needs, make the standard solution of pH1～14 respectively.Test paper is immersed in the standard solution, take out immediately, modulate colour atla, rose-red → red → orange → Huang → yellowish green → bluish-green → indigo plant that the color range of colour atla is respectively → purplish red according to the colour developing after its 5 seconds.
Using method: get test strips, immerse in the liquid to be measured and take out immediately, relatively can directly draw test result with standard color card after 5 seconds.
Claims (4)
1. test paper that is used to detect solution acid alkalinity, it is characterized in that: it includes the colour developing indicator paper block of test function, indicator paper block has flooded the mixed solution of soap Huang 0.01～0.20 grams per liter, m-methyl red 0.01～0.20 grams per liter, bromcresol green 0.01～0.20 grams per liter, nitro-nitrogen yellow 0.01～0.20 grams per liter, phenolphthalein 0.01～0.20 grams per liter, alizarin yellow R 0.01～0.20 grams per liter, titan yellow 0.01～0.20 grams per liter, second alcohol and water, and the pH value of this mixed solution equals 5～8.
2. detection test paper according to claim 1 is characterized in that: described colour developing indicator paper block is the quantitative chromatographic test paper with separating property.
3. detection test paper according to claim 1 and 2 is characterized in that: the wide of described colour developing indicator paper block is 0.6～1.0 centimetre, and length is 5.5～6.5 centimetres.
4. preparation method who is used to detect the test paper of solution acid alkalinity, it is characterized in that: the colour developing indicator paper block that includes test function, the colour developing indicator paper block by quantitative chromatography body paper be placed on flooded for 5～10 seconds in the maceration extract after, be placed in the drying box, after 70～100 ℃ of dryings, obtain.The layoutprocedure of maceration extract is to be dissolved in soap Huang, m-methyl red, bromcresol green, nitro-nitrogen yellow, phenolphthalein, alizarin yellow R, titan yellow in the mixed solution of second alcohol and water by proportioning, the weight ratio of second alcohol and water is 0.6: 1.2～1: 1.2, and the pH value with NaOH solution adjusting maceration extract equals 5～8 then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145478 CN1224836C (en) | 2002-11-19 | 2002-11-19 | Test paper for detecting solution PH value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02145478 CN1224836C (en) | 2002-11-19 | 2002-11-19 | Test paper for detecting solution PH value |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501072A true CN1501072A (en) | 2004-06-02 |
| CN1224836C CN1224836C (en) | 2005-10-26 |
Family
ID=34232463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02145478 Expired - Lifetime CN1224836C (en) | 2002-11-19 | 2002-11-19 | Test paper for detecting solution PH value |
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|---|---|
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281140B (en) * | 2008-01-10 | 2010-09-08 | 浙江传化股份有限公司 | Rapid measuring method of fabric pH value |
| CN102519959A (en) * | 2011-12-15 | 2012-06-27 | 上海馨晟试化工科技有限公司 | Highly sensitive pH test paper and preparation method thereof |
| CN102590209A (en) * | 2012-03-02 | 2012-07-18 | 上海馨晟试化工科技有限公司 | Daily test paper and its preparation method |
| CN103033504A (en) * | 2012-12-08 | 2013-04-10 | 杭州特种纸业有限公司 | Preparation method of universal pH test paper |
| CN103033511A (en) * | 2012-12-08 | 2013-04-10 | 杭州特种纸业有限公司 | Preparation method of accurate pH test paper |
| CN108072656A (en) * | 2016-11-28 | 2018-05-25 | 上海泓宝绿色水产股份有限公司 | A kind of water quality detection pH test paper and water quality detection method |
| CN108593640A (en) * | 2018-04-19 | 2018-09-28 | 长春万成生物电子工程有限公司 | A kind of Test paper of water quality total alkalinity and preparation method thereof and detection method |
| CN109540885A (en) * | 2018-11-30 | 2019-03-29 | 河北工程大学 | A kind of pH test paper and preparation method thereof |
| CN113390865A (en) * | 2021-06-07 | 2021-09-14 | 浙江工业大学 | Quick, sensitive and nontoxic acid-base indicator paper, preparation method thereof and application thereof in biological and pharmaceutical detection |
| CN113702373A (en) * | 2021-08-30 | 2021-11-26 | 北京图灵微研生物科技有限公司 | Indicator capable of rapidly responding to slight pH value change and preparation method and application thereof |
-
2002
- 2002-11-19 CN CN 02145478 patent/CN1224836C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281140B (en) * | 2008-01-10 | 2010-09-08 | 浙江传化股份有限公司 | Rapid measuring method of fabric pH value |
| CN102519959B (en) * | 2011-12-15 | 2014-05-07 | 上海馨晟试化工科技有限公司 | Highly sensitive pH test paper and preparation method thereof |
| CN102519959A (en) * | 2011-12-15 | 2012-06-27 | 上海馨晟试化工科技有限公司 | Highly sensitive pH test paper and preparation method thereof |
| CN102590209A (en) * | 2012-03-02 | 2012-07-18 | 上海馨晟试化工科技有限公司 | Daily test paper and its preparation method |
| CN103033504B (en) * | 2012-12-08 | 2014-10-29 | 杭州特种纸业有限公司 | Preparation method of universal pH test paper |
| CN103033511A (en) * | 2012-12-08 | 2013-04-10 | 杭州特种纸业有限公司 | Preparation method of accurate pH test paper |
| CN103033504A (en) * | 2012-12-08 | 2013-04-10 | 杭州特种纸业有限公司 | Preparation method of universal pH test paper |
| CN103033511B (en) * | 2012-12-08 | 2014-12-03 | 杭州特种纸业有限公司 | Preparation method of accurate pH test paper |
| CN108072656A (en) * | 2016-11-28 | 2018-05-25 | 上海泓宝绿色水产股份有限公司 | A kind of water quality detection pH test paper and water quality detection method |
| CN108593640A (en) * | 2018-04-19 | 2018-09-28 | 长春万成生物电子工程有限公司 | A kind of Test paper of water quality total alkalinity and preparation method thereof and detection method |
| CN109540885A (en) * | 2018-11-30 | 2019-03-29 | 河北工程大学 | A kind of pH test paper and preparation method thereof |
| CN113390865A (en) * | 2021-06-07 | 2021-09-14 | 浙江工业大学 | Quick, sensitive and nontoxic acid-base indicator paper, preparation method thereof and application thereof in biological and pharmaceutical detection |
| CN113702373A (en) * | 2021-08-30 | 2021-11-26 | 北京图灵微研生物科技有限公司 | Indicator capable of rapidly responding to slight pH value change and preparation method and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1224836C (en) | 2005-10-26 |
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Granted publication date: 20051026 |