CN108072651A - A kind of total alkalinity detecting system and its application method for being used to detect that total alkalinity is 0-300mg/L - Google Patents
A kind of total alkalinity detecting system and its application method for being used to detect that total alkalinity is 0-300mg/L Download PDFInfo
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Abstract
The invention discloses a kind of for detecting the total alkalinity detecting system and its application method that total alkalinity is 0 300mg/L, belong to detection field, total alkalinity detecting system is made of total alkalinity test paper and colorimetric card.Total alkalinity test paper is prepared according to the following steps：Step A, chromophoric solution is prepared, chromophoric solution is formulated by Bromothymol blue, deionized water and ethyl alcohol, Bromothymol blue:Deionized water:Ethyl alcohol=0.0076~0.038g:0.5~2mL:70~80mL；Step B, test paper is immersed in chromophoric solution；Step C, the test paper after dry immersion, obtains total alkalinity test paper.Colorimetric card is prepared according to the following steps：Step a, on several total alkalinity test paper, the standard solution of different total alkalinity concentration is added dropwise respectively；Step b, treat that 4 6min develop the color, according to the total alkalinity test paper of colour developing, make standard color block；Step c, by the corresponding total alkalinity concentration of standard color block, standard color block is arranged in order, obtains colorimetric card.The present invention has many advantages, such as that detection is accurate, colour developing is uniform.
Description
Technical field
The invention belongs to detection field more particularly to a kind of total alkalinity detections for being used to detect that total alkalinity is 0-300mg/L
System and its application method.
Background technology
Total alkalinity refers in solution the weight that the substance of neutralization can occur with strong acid, and this kind of substance includes highly basic, weak
Alkali, strong base-weak acid salt etc..Total alkalinity index is usually used in the dissolubility and toxicity of the buffer capacity and metal of evaluation water body wherein,
It is the judgement index to water and wastewater treatment process control.
The main traditional acid-base titration of the detection method of total alkalinity is detected using Basicity Determination instrument or test paper.Wherein, pass
The acid-base titration of system is experimental method, has many advantages, such as that detection is accurate, but process is cumbersome, and detection site is limited.Basicity
Analyzer can also accurately detect total alkalinity, but its is expensive, and be not easy portable.Test paper detection limits from place, test paper
It is convenient for carrying, operating personnel can detect sample with place at any time, and easy to operate quick.But presently commercially available use
In the test paper of detection total alkalinity, detection range is wide in range, can not when the sample for a certain narrower range total alkalinity is detected
It compares out corresponding color and concentration or corresponding color and concentration can not be contrasted exactly, i.e., cannot draw detection knot
Fruit.Meanwhile also there is the shortcomings of colour developing is uneven in commercially available test paper.
The content of the invention
The present invention provides a kind of total alkalinity detecting system and its application method for being used to detect that total alkalinity is 0-300mg/L,
The defects of to overcome the prior art.
To achieve the above object, the present invention provides a kind of total alkalinity detection system for being used to detect that total alkalinity is 0-300mg/L
System, is made of total alkalinity test paper and colorimetric card.
Total alkalinity test paper is prepared according to the following steps：Step A, chromophoric solution is prepared, chromophoric solution is by bromine Thymol
Blue, deionized water and ethyl alcohol are formulated, Bromothymol blue:Deionized water:Ethyl alcohol=0.0076~0.038g:0.5~
2mL:70~80mL；Step B, test paper is immersed in chromophoric solution；Step C, the test paper after dry immersion, obtains total alkalinity examination
Paper.
Wherein, in step A, the detailed process for preparing chromophoric solution is：Deionized water and ethyl alcohol are mixed in proportion, weigh bromine
Thymol blue, adds in the mixed liquor of deionized water and ethyl alcohol, and stirring is to being completely dissolved.
Colorimetric card is prepared according to the following steps：Step a, on several total alkalinity test paper, different total alkalis are added dropwise respectively
Spend the standard solution of concentration；Step b, treat that 4-6min develops the color, according to the total alkalinity test paper of colour developing, make standard color block；Step c,
By the corresponding total alkalinity concentration of standard color block, standard color block is arranged in order, obtains colorimetric card.
Preferably, in step b, developing time 5min.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, Bromothymol blue:Deionized water:Ethyl alcohol=0.0152g:1mL:75mL.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step B, test paper impregnates 60~70s in chromophoric solution.Preferably, soaking time 60s.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step C, test paper dries 20-70min in 25-60 DEG C.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step C, test paper dries 20min in 60 DEG C.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step a, the total alkalinity concentration range of standard solution is 0-300mg/L.Preferably, 11
On a total alkalinity test paper, it is 0,30,60,90,120,150,180,210,240,270 and 300mg/ that total alkalinity concentration is added dropwise respectively
The standard solution of L.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step a, standard solution is NaOH solution and/or Na2CO3Solution.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, in step b, using the total alkalinity test paper of colorimetric instrument scanning colour developing, the total alkalinity to be developed the color
The tristimulus values of test paper make standard color block according to tristimulus values.
Further, the present invention provides a kind of for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, can be with
It has the feature that：Wherein, test paper is blotting paper.Preferably, the model H-5076 of blotting paper.
The present invention also provides a kind of for detecting the application method for the total alkalinity detecting system that total alkalinity is 0-300mg/L,
Sample to be tested is added dropwise on total alkalinity test paper, after 4-6min colour developings, observes the colour developing color of total alkalinity test paper, and and colorimetric
The standard color block of card compares, obtain with standard color block similar in the colour developing color of total alkalinity test paper, read the corresponding of standard color block
Concentration is the total alkalinity of sample.Preferably, developing time 5min.
The advantageous effect of this patent is：The present invention provides a kind of total alkalinity for being used to detect that total alkalinity is 0-300mg/L
Detecting system and its application method, total alkalinity system are made of total alkalinity test paper and colorimetric card, and total alkalinity test paper is through chromophoric solution
It impregnates, dry be prepared again, wherein, chromophoric solution is formulated by Bromothymol blue, deionized water and ethyl alcohol, in bromine hundred
Fragrant phenol is blue:Deionized water:Ethyl alcohol=0.0076~0.038g:0.5~2mL:70~80mL, the chromophoric solution can make what it was prepared
Total alkalinity test paper is that colour developing aberration is apparent in the range of 0~300mg/L in total alkalinity, is easily differentiated；Correspondingly, tried using the total alkalinity
Standby colorimetric card made of paper, the standard color block difference for making colorimetric card is apparent, easily compares, finally achievable pair of total alkalinity test paper and colorimetric card
Total alkalinity is quick, the accurate detection of Arbitrary Samples in the range of 0~300mg/L.In addition, in the manufacturing process of total alkalinity test paper,
Test paper impregnates 60-70s in chromophoric solution, and dries 20min in 60 DEG C, and designs developing time as 4-6min, can make total alkali
It is uniform to spend the colour developing of test paper, easily observes and compares exactly.
Description of the drawings
Fig. 1 is the figure of one colorimetric card of embodiment.
Specific embodiment
Embodiment one
The present embodiment provides a kind of for detecting the total alkalinity detecting system and its user that total alkalinity is 0-300mg/L
Method.Total alkalinity detecting system is made of total alkalinity test paper and colorimetric card.
Total alkalinity test paper is prepared according to the following steps：Step A, chromophoric solution is prepared, chromophoric solution is by bromine Thymol
Blue, deionized water and ethyl alcohol are formulated, Bromothymol blue:Deionized water:Ethyl alcohol=0.0152g:1mL:75mL.Step B,
Test paper is placed in chromophoric solution, impregnates 60s；Step C, by the test paper after immersion in 60 DEG C, 20min is dried, obtains total alkalinity
Test paper.
Wherein, test paper is H-5076 blotting papers.
Colorimetric card is prepared according to the following steps：Step a, on 11 total alkalinity test paper, it is dense that total alkalinity is added dropwise respectively
It spends for the NaOH solution of 0,30,60,90,120,150,180,210,240,270 and 300mg/L.Step b, treat that 5min develops the color, it should
With the total alkalinity test paper of colorimetric instrument scanning colour developing, the tristimulus values of the total alkalinity test paper to be developed the color, according to tristimulus values system
Make standard color block.Step c, by the corresponding total alkalinity concentration of standard color block, standard color block is arranged in order, obtains colorimetric card, such as
Shown in Fig. 1.
The application method of total alkalinity detecting system：By Watson distilled water, mountain mineral water at the age of one hundred years old, river water 1 and river water 2 four
Sample to be tested is added dropwise on total alkalinity test paper, after 5min colour developings, observes the colour developing color of total alkalinity test paper.Wherein, it is added dropwise and bends
The total alkalinity test paper of Chen Shi distilled water and mountain mineral water at the age of one hundred years old is yellow, and it is green that the total alkalinity test paper of river water 1 and river water 2, which is added dropwise,
Color.By the total alkalinity test paper of four colour developings compared with the standard color block of colorimetric card, the colour developing color phase with total alkalinity test paper is obtained
Near standard color block reads the respective concentration of standard color block, is the total alkalinity of sample, and concrete outcome is shown in Table 1.
In addition, according to national standard GB/T 15451-2006 industrial circulating cooling waters total alkalis and the measure of phenolphthalein alkalinity, examine respectively
2 four Watson distilled water, mountain mineral water at the age of one hundred years old, river water 1 and river water samples are surveyed, to verify the accurate of total alkalinity detecting system
Property, testing result is shown in Table 1.
In addition, 2 four Watson distilled water, mountain mineral water at the age of one hundred years old, river water 1 and river water samples are detected respectively using commercially available test paper
Product, testing result are shown in Table 1.
Embodiment two
The present embodiment provides a kind of for detecting the total alkalinity detecting system and its user that total alkalinity is 0-300mg/L
Method.Total alkalinity detecting system is made of total alkalinity test paper and colorimetric card.
Total alkalinity test paper is prepared according to the following steps：Step A, chromophoric solution is prepared, chromophoric solution is by bromine Thymol
Blue, deionized water and ethyl alcohol are formulated, Bromothymol blue:Deionized water:Ethyl alcohol=0.0076g:2mL:70mL.Step B,
Test paper is placed in chromophoric solution, impregnates 65s；Step C, by the test paper after immersion in 25 DEG C, 70min is dried, obtains total alkalinity
Test paper.
Wherein, test paper is H-5076 blotting papers.
Colorimetric card is prepared according to the following steps：Step a, on 11 total alkalinity test paper, it is dense that total alkalinity is added dropwise respectively
It spends for the Na of 0,30,60,90,120,150,180,210,240,270 and 300mg/L2CO3Solution.Step b, treat that 4min develops the color,
Using the total alkalinity test paper of colorimetric instrument scanning colour developing, the tristimulus values of the total alkalinity test paper to be developed the color, according to tristimulus values
Make standard color block.Step c, by the corresponding total alkalinity concentration of standard color block, standard color block is arranged in order, obtains colorimetric card.
The application method of total alkalinity detecting system：By Watson distilled water, mountain mineral water at the age of one hundred years old, river water 1 and river water 2 four
Sample to be tested is added dropwise on total alkalinity test paper, after 4min colour developings, observes the colour developing color of total alkalinity test paper.Wherein, it is added dropwise and bends
The total alkalinity test paper of Chen Shi distilled water and mountain mineral water at the age of one hundred years old is yellow, and it is green that the total alkalinity test paper of river water 1 and river water 2, which is added dropwise,
Color.By the total alkalinity test paper of four colour developings compared with the standard color block of colorimetric card, the colour developing color phase with total alkalinity test paper is obtained
Near standard color block reads the respective concentration of standard color block, is the total alkalinity of sample, and concrete outcome is shown in Table 1.
Embodiment three
The present embodiment provides a kind of for detecting the total alkalinity detecting system and its user that total alkalinity is 0-300mg/L
Method.Total alkalinity detecting system is made of total alkalinity test paper and colorimetric card.
Total alkalinity test paper is prepared according to the following steps：Step A, chromophoric solution is prepared, chromophoric solution is by bromine Thymol
Blue, deionized water and ethyl alcohol are formulated, Bromothymol blue:Deionized water:Ethyl alcohol=0.038g:0.5mL:80mL.Step
B, test paper is placed in chromophoric solution, impregnates 70s；Step C, by the test paper after immersion in 37 DEG C, 30min is dried, obtains total alkali
Spend test paper.
Wherein, test paper is H-5076 blotting papers.
Colorimetric card is prepared according to the following steps：Step a, on 11 total alkalinity test paper, it is dense that total alkalinity is added dropwise respectively
Spend the NaOH and Na for 0,30,60,90,120,150,180,210,240,270 and 300mg/L2CO3Mixed solution, wherein,
NaOH and Na2CO3Concentration ratio be 4:7.Step b, treat that 6min develops the color, using the total alkalinity test paper of colorimetric instrument scanning colour developing, obtain
To the tristimulus values of the total alkalinity test paper of colour developing, standard color block is made according to tristimulus values.Step c, it is corresponding by standard color block
Total alkalinity concentration, be arranged in order standard color block, obtain colorimetric card.
The application method of total alkalinity detecting system：By Watson distilled water, mountain mineral water at the age of one hundred years old, river water 1 and river water 2 four
Sample to be tested is added dropwise on total alkalinity test paper, after 6min colour developings, observes the colour developing color of total alkalinity test paper.Wherein, it is added dropwise and bends
The total alkalinity test paper of Chen Shi distilled water and mountain mineral water at the age of one hundred years old is yellow, and it is green that the total alkalinity test paper of river water 1 and river water 2, which is added dropwise,
Color.By the total alkalinity test paper of four colour developings compared with the standard color block of colorimetric card, the colour developing color phase with total alkalinity test paper is obtained
Near standard color block reads the respective concentration of standard color block, is the total alkalinity of sample, and concrete outcome is shown in Table 1.
The testing result of 1 each method of table and each embodiment
The total alkalinity detecting system and the testing result of National Standard Method provided according to the results contrast of table 1, embodiment one and two
Unanimously, the total alkalinity detecting system and the testing result of National Standard Method that embodiment three provides are basically identical, commercially available test paper and National Standard Method
Testing result difference it is larger.
Claims (10)
1. a kind of total alkalinity detecting system for being used to detect that total alkalinity is 0-300mg/L, it is characterised in that：
It is made of total alkalinity test paper and colorimetric card；
The total alkalinity test paper is prepared according to the following steps：
Step A, chromophoric solution is prepared, the chromophoric solution is formulated by Bromothymol blue, deionized water and ethyl alcohol, bromine hundred
In fragrant phenol it is blue:Deionized water:Ethyl alcohol=0.0076~0.038g:0.5~2mL:70~80mL；
Step B, test paper is immersed in the chromophoric solution；
Step C, the test paper after dry immersion, obtains the total alkalinity test paper；
The colorimetric card is prepared according to the following steps：
Step a, on several described total alkalinity test paper, the standard solution of different total alkalinity concentration is added dropwise respectively；
Step b, treat that 4-6min develops the color, according to the total alkalinity test paper of colour developing, make standard color block；
Step c, by the quasi- corresponding total alkalinity concentration of color lump is marked, the standard color block is arranged in order, obtains the colorimetric
Card.
2. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, Bromothymol blue:Deionized water:Ethyl alcohol=0.0152g:1mL:75mL.
3. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step B, the test paper impregnates 60~70s in the chromophoric solution.
4. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step C, the test paper dries 20-70min in 25-60 DEG C.
5. according to claim 4 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step C, the test paper dries 20min in 60 DEG C.
6. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step a, the total alkalinity concentration range of the standard solution is 0-300mg/L.
7. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step a, the standard solution is NaOH solution and/or Na2CO3Solution.
8. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, in step b, using the total alkalinity test paper of colorimetric instrument scanning colour developing, the total alkalinity examination to be developed the color
The tristimulus values of paper make the standard color block according to the tristimulus values.
9. according to claim 1 for detecting the total alkalinity detecting system that total alkalinity is 0-300mg/L, feature exists
In：
Wherein, the test paper is blotting paper.
10. the application method for being used to detect the total alkalinity detecting system that total alkalinity is 0-300mg/L described in claim 1-9,
It is characterized in that：
Sample to be tested is added dropwise on the total alkalinity test paper, after 4-6min colour developings, observes the colour developing of the total alkalinity test paper
Color, and compared with the standard color block of the colorimetric card, obtain and institute similar in the colour developing color of the total alkalinity test paper
Standard color block is stated, reads the respective concentration of the standard color block, is the total alkalinity of the sample.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455792A (en) * | 2019-08-21 | 2019-11-15 | 启盘科技发展(上海)有限公司 | Basicity concentration quick detection reagent and its detection method in a kind of water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313735A (en) * | 2011-07-04 | 2012-01-11 | 天津生机集团股份有限公司 | Kit for rapidly detecting pH value of water for fishery culture and detection method thereof |
| CN104345055A (en) * | 2013-07-26 | 2015-02-11 | 丰益(上海)生物技术研发中心有限公司 | Mixed indicator, utilization and rapid detection method for grease acid value |
-
2016
- 2016-11-28 CN CN201611066156.5A patent/CN108072651A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313735A (en) * | 2011-07-04 | 2012-01-11 | 天津生机集团股份有限公司 | Kit for rapidly detecting pH value of water for fishery culture and detection method thereof |
| CN104345055A (en) * | 2013-07-26 | 2015-02-11 | 丰益(上海)生物技术研发中心有限公司 | Mixed indicator, utilization and rapid detection method for grease acid value |
Non-Patent Citations (1)
| Title |
|---|
| 史学增等: "牛奶掺碱性物质的快速检验", 《标准化报道》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455792A (en) * | 2019-08-21 | 2019-11-15 | 启盘科技发展(上海)有限公司 | Basicity concentration quick detection reagent and its detection method in a kind of water |
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Application publication date: 20180525 |