CN1563979A - AlO2 assaying liquid and its colorimeteric estimation tube - Google Patents
AlO2 assaying liquid and its colorimeteric estimation tube Download PDFInfo
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- CN1563979A CN1563979A CN 200410010123 CN200410010123A CN1563979A CN 1563979 A CN1563979 A CN 1563979A CN 200410010123 CN200410010123 CN 200410010123 CN 200410010123 A CN200410010123 A CN 200410010123A CN 1563979 A CN1563979 A CN 1563979A
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Abstract
The determination liquid is prepared by mixing 0.005mol/L methyl red or methyl orange in 12-24 unit volume, 0.001% O-germinal amine in 1-7 unit volume, concentration 0.001mol/L sulfuric acid 40-85 unit volume. The colorimetric determination tube is a vacuum seal glass including conatant section part and a connected capillary part at one end. The determination liquid of chlorine dioxide is sealed inside determination tube. Height of determination liquid is as H1, and height of leaving a blank is as H2, then H1: H2 is equal to 1: 7-12. With capillary section being broken off in water sample, water sample is sacked through capillary to the tube, where discolouration effect occurs. Detection limit is accorded with standard of national drinking water require. Features are commercialization, simple and long time for conserve determination liquid etc.
Description
The technical field is as follows: the invention relates to a method for measuring trace amount of related chemical substances in water and a measuring instrument thereof, in particular to a chlorine dioxide measuring liquid in water and a colorimetric measuring tube thereof.
Secondly, the background technology: as is known, chlorine dioxide is a novel high-efficiency, broad-spectrum, rapid and low-toxicity disinfectant, and is widely applied to sewage treatment of industrial, agricultural, medical and sanitary systems, daily disinfection and sterilization, and the chlorine dioxide is used as the disinfectant in tap water production and sewage treatment of many countries all over the world. Especially during the last years of atypical pneumonia epidemics, chlorine dioxide is commonly used in hospital sewage treatment as an inexorable sanitizer.
The outstanding advantages of chlorine dioxide are: the killing rate of bacteria, fungi and virus spores can reach 100%, and chlorine dioxide has more outstanding performances of not generating chlorophenol and methylene dichloride and dioxin carcinogenic substances. The disinfectant is widely used for killing various pathogenic microorganisms such as escherichia coli, staphylococcus aureus, hepatitis virus, influenza virus, bacillus anthracis, spore, gonococcus and AIDS virus, and has wide application in the aspects of disinfection of medical instruments, disinfection of tableware, melon and fruit and vegetable cleaning solution, food machinery, containers, food conveying pipelines, meat preservation and the like, so chlorine dioxide is listed as a high-efficiency and safe disinfectant of A1 level by the World Health Organization (WHO). After disinfection and sterilization are carried out by using chlorine dioxide, the content of chlorine dioxide in water can express the degree of the sterilization effect, so that the method has practical significance for measuring the content of chlorine dioxide.
The existing method for measuring the concentration of chlorine dioxide is to use the iodometry of residual chlorine to carry out relative test. Determining the total residual chlorine value in water, comprising: HClO, ClO, NH3Cl, NH3Cl, and the like. The principle of the method is as follows: reacting residual chlorine with potassium iodide in an acid solution to release quantitative iodine, titrating with a sodium thiosulfate standard solution,
or: ( )
Problems with iodometry are:
(1) the iodometry method for measuring the residual chlorine content in the water has more interference factors.
As the water quality often contains nitrite, high iron and manganese, and the trace substances are easy to react withpotassium iodide to release iodine, the measured residual chlorine data is inaccurate, and the influence of the substances needs to be eliminated in operation, but the complete stop is difficult.
(2) Another problem with iodometry for residual chlorine is: the related reagents are six in number, the operation steps are complicated and complex, the time is long, the labor intensity is high, the titration end point is not easy to judge, and the error of the measurement result is large.
The method relates to the following reagents: (1) potassium iodide, (2) sulfuric acid, (3) potassium dichromate standard solution (1/6K)2Gr2O70.0250ml/L), (4) sodium thiosulfate standard titration solution, (5) starch solution, (6) acetate buffer solution. The operation accuracy requirement is high, and the method is long, complicated and unstable in reagent and needs to be prepared for use on site. More work is required to be done in the titration of the standard solution and in the determination of the residual chlorine data. The weighing precision of the potassium dichromate reaches 0.0001 g, the instrument is expensive, and the cost is high.
The invention content is as follows: the purpose of the invention is as follows: the residual chlorine testing steps are simplified, the testing time is greatly shortened, the labor intensity of workers is reduced, and the chlorine dioxide testing solution and the colorimetric testing tube thereof are prepared.
The technical scheme adopted by the invention is as follows:
a chlorine dioxide measuring solution is prepared by mixing 0.005% of methyl red or methyl orange 12-24 unit volume, 0.001% of o-biserucyl amine 1-7 unit volume, and 1mol/L sulfuric acid 40-85 unit volume.
The chlorine dioxide determination solution is prepared by mixing 15-20 unit volumes of 0.005% methyl red or methyl orange, 2-5 unit volumes of 0.001% o-gemini and 50-75 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The chlorine dioxide measuring solution has the advantages that the volume of the measuring solution is correspondingly reduced or increased when the concentration of each effective component in the measuring solution is increased or reduced.
A colorimetric determination tube for chlorine dioxide comprises a vacuum sealed glass tube with uniform cross section, a sealed capillary tube section at one end of the glass tube, chlorine dioxide determination liquid in the glass tube, and height H of the determination liquid in the glass tube1Equal section clearance height H of glass tube2The ratio of (A) to (B) is H1∶H2＝1∶7～12。
The measuring tube is used for measuring the height H of the liquid in the glass tube1Equal section clearance height H of glass tube2The ratio of (A) to (B) is H1∶H2＝1∶7～8。
The measuring tube is prepared by mixing 0.005% of methyl red or methyl orange 12-24 unit volume, 0.001% of o-biserumide 1-7 unit volume and 1mol/L sulfuric acid 40-85 unit volume.
The chlorine dioxide colorimetric determination tube is prepared by mixing 15-20 unit volumes of 0.005% methyl red or methyl orange, 2-5 unit volumes of 0.001% o-gemini and 50-75 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The measuring tube can reduce or increase the volume of the measuring liquid correspondingly when the concentration of each effective component in the measuring liquid is increased or reduced.
The invention has the following positive beneficial effects:
1. the invention commercializes the detection technology, and the prepared detection liquid is packaged in a vacuum glass tube and can be directly used. During operation, the capillary section of the test tube is broken off in the water sample to be tested, so that the water sample to be tested is automatically and quantitatively sucked into the tube to be subjected to color change reaction with the test solution, and the color is stable and then is compared with a standard color scale, and the accurate chlorine dioxide content can be obtained. The standard solution and reagent are not required to be prepared in each test, so that the detection steps can be greatly simplified, the determination time is saved, the workload is reduced, and the labor intensity is reduced.
2. The measuring solution has the advantages of reasonable formula, advanced technology, stable performance and simple use. The standard sample liquid is adopted to react with the standard sample liquid in advance to form a permanent color code standard, the permanent color code standard is packaged to form a contrast color scale, the field detection is carried out without preparing any other reagent, and the detection result is accurate and reliable.
3. Compared with the traditional method for measuring chlorine dioxide by an iodometry method, the method has the advantages that the problem of interference caused by release of iodine caused by the action of nitrite, high iron and manganese contained in water and potassium iodide in an acid solution is solved, the measurement steps are reduced, and the measurement speed is accelerated.
4. The color reaction of the measuring liquid and the object to be measured (chlorine dioxide) is automatically carried out in the vacuum glass tube under the specific PH value condition, random errors and human errors can be effectively avoided, the detection result is accurate and reliable, the requirement of water quality analysis error precision is met, and the detection limit meets the national drinking water requirement standard.
5. The invention has the advantages of convenient carrying and use, simple, rapid and accurate determination and long storage time. The field detection does not need other equipment and instruments, thereby greatly saving manpower and material resources and reducing the comprehensive cost. The invention is easy to popularize and implement and has better social and economic benefits.
The data comparison table of the test tube and the iodometry comprises the following steps:
description of the drawings:
FIG. 1: chlorine dioxide colorimetric estimation tube structure schematic diagram
The concrete implementation mode is as follows:
the first embodiment is as follows: referring to fig. 1, in the figure, 1 is a vacuum glass tube with equal section, 2 is a capillary tube section, and 3 is chlorine dioxide determination liquid. H1To determine the liquid height, H2The vacuum tube with the equal section is reserved with empty height. In this example, the outer diameter of the medium-section vacuum glass tube was 6.5 mm, the total height was 12 cm, and the height H of the measurement liquid in the glass tube was11.1 cm, height H of the clearance28.8 cm and a capillary length of 2.1 cm.
The formula of the determination solution of the invention is as follows: contains 0.005% methyl red 1.8L, 0.001% o-biserucyl amine 0.4L, 1mol/L sulfuric acid 6.2L, and is mixed to prepare 8.4L chlorine dioxide determination liquid, and the chlorine dioxide determination liquid is filled, vacuum-sealed and made into 2350 determination tubes.
The formula of the measuring solution can also be as follows: in unit volume as an example: containing 0.005% methyl red 12 unit volume, 0.001% o-bisbuddleylamine 1 unit volume, and 1mol/L sulfuric acid 40 unit volume, were mixed and formulated as above to make the assay tube.
The formula of the measuring solution comprises the following components: 24 unit volumes of 0.005 percent methyl red, 7 unit volumes of 0.001 percent o-bisbuddlein and 85 unit volumes of sulfuric acid with the concentration of 1mol/L are mixed, prepared and filled to prepare the measuring tube.
A method for manufacturing a series of standard color codes for detecting the content of chlorine dioxide and forming color scales. For example, a standard color code 12-color scale tube for detecting the content of low-concentration chlorine dioxide in water is prepared, and the chlorine dioxide content is respectively 0mg/L, 0.03mg/L, 0.05mg/L, 0.1mg/L, 0.15mg/L, 0.20mg/L, 0.30mg/L, 0.4mg/L, 0.5mg/L, 0.6mg/L, 0.7mg/L and 1.0 mg/L. Firstly, taking 20ml of 0.005% methyl red or methyl orange, 5ml of 0.001% o-gemini and 75ml of 1mol/L sulfuric acid, mixing to prepare a determination solution, then respectively preparing 12 standard concentration chlorine dioxide aqueous solutions with chlorine dioxide contents of 0mg/L, 0.03mg/L, 0.05mg/L, 0.1mg/L, 0.15mg/L, 0.20mg/L, 0.30mg/L, 0.4mg/L, 0.5mg/L, 0.6mg/L, 0.7mg/L and 1.0mg/L, respectively filling the determination solution and the various standard concentration chlorine dioxide aqueous solutions into 12 color standard tubes according to a ratio of 1: 10 for reaction and color development, fixing the colors, and then sealing the color standard tubes to form the shapeWhen the colour scale standard colour scale tube is used for measuring and comparing, it should be noted that the colour scale made up by using measuring liquid and chlorine dioxide aqueous solution with standard concentration according to the ratio of 1: 10 only has its height H identical to that of measuring liquid in the measuring tube1And the clearance height H of the equal-section glass tube2The ratio of 1: 10 is only of practical significance.
The same method can prepare 10-color tone standard color scale with the high-concentration chlorine dioxide content of 0mg/L, 1mg/L, 2mg/L, 3mg/L, 4mg/L, 5mg/L, 6mg/L, 7mg/L, 8mg/L, 9mg/L and 10mg/L respectively, which is not detailed. Of course, different formulas of the measuring liquid and different color scales of the correspondingly manufactured standard color scale are formed. Here, the arrangement method of the standard color patches will be described by way of example only.
When the device is used, a capillary section of a measuring tube is immersed into sample liquid to be measured, the capillary is broken, the blank section of the vacuum glass tube with the equal section is waited to be fully absorbed by the sample liquid to be measured, the blank section is taken out and is repeatedly inverted and mixed, the blank section is fully subjected to color reaction, the color is stable for about 5-10 minutes and then is compared with a standard color code, the chlorine dioxide concentration value corresponding to the nearest standard color code is the measured chlorine dioxide content, and if the color of the measuring tube is between the two standard color codes, the average value is taken.
Example two: referring to fig. 1, in the figure, 1 is a vacuum glass tube with equal section, 2 is a capillary tube section, and 3 is chlorine dioxide determination liquid. H1To determine the liquid height, H2The vacuum tube with the equal section is reserved with empty height. In this example, the outer diameter of the medium-section vacuum glass tube was 8 mm, the total height was 10 cm, and the height H of the measurement liquid in the glass tube was H1Is 1 cm and has a clearance height H27 cm and a capillary length of 2 cm.
The formula of the chlorine dioxide determination solution comprises: contains 15 unit volumes of 0.005 percent of methyl red, 2 unit volumes of 0.001 percent of o-biserucyl amine and 50 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The formula of the chlorine dioxide determination solution can also be as follows: contains 20 unit volumes of 0.005 percent methyl red, 5 unit volumes of 0.001 percent o-bisbuddlein and 75 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The chlorine dioxide determination liquid comprises the following components: contains 17.5 unit volumes of 0.005% methyl red or methyl orange, 3.5 unit volumes of 0.001% o-biserucyl amine and 62.5 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The preparation of the measurement solution and the method for preparing the measurement tube and the method for preparing the color patch are the same as those in the first embodiment, and detailed descriptions thereof are omitted.
Example three: referring to fig. 1, in the figure, 1 is a vacuum glass tube with equal section, 2 is a capillary tube section, and 3 is chlorine dioxide determination liquid. H1To determine the liquid height, H2The vacuum tube with the equal section is reserved with empty height. In this example, the outer diameter of the medium-section vacuum glass tube was 6 mm, the total height was 12 cm, and the height H of the measurement liquid in the glass tube was H10.8 cm, height Hof the clearance29.6 cm and a capillary length of 1.6 cm.
The formula of the chlorine dioxide determination solution comprises: contains 15 unit volumes of 0.005 percent of methyl orange, 2 unit volumes of 0.001 percent of o-biserucyl amine and 50 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The formula of the chlorine dioxide determination solution can also be as follows: contains 20 unit volumes of 0.005% methyl orange, 5 unit volumes of 0.001% o-bisbuddlein and 75 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The chlorine dioxide determination liquid comprises the following components: contains 17.5 unit volumes of 0.005% methyl red or methyl orange, 3.5 unit volumes of 0.001% o-biserucyl amine and 62.5 unit volumes of sulfuric acid with the concentration of 1 mol/L.
The preparation of the measurement solution and the method of preparing the measurement tube and the method of preparing the color patch will not be described in detail.
Claims (8)
1. A chlorine dioxide determination solution is characterized in that: taking the unit volume as an example, the composition is prepared by mixing 12-24 unit volumes of 0.005% methyl red or methyl orange, 1-7 unit volumes of 0.001% o-gemini and 40-85 unit volumes of sulfuric acid with the concentration of 1 mol/L.
2. A chlorine dioxide measuring solution according to claim 1, wherein: the composition is prepared by mixing 15-20 unit volumes of 0.005% methyl red or methyl orange, 2-5 unit volumes of 0.001% o-gemini, and 50-75 unit volumes of 1mol/L sulfuric acid.
3. A chlorine dioxide measuring solution according to claim 1 or 2, wherein: the increase or decrease of the concentration of each effective component in the measuring solution correspondingly reduces or increases the volume of the measuring solution.
4. The utility model provides a chlorine dioxide colorimetric estimation pipe, contains the sealed glass tube of uniform cross-section vacuum, is equipped with one section sealed intercommunication capillary segment at glass tube one end, characterized by: chlorine dioxide measuring liquid is filled in the glass tube, and the height H of the measuring liquid in the glass tube1Equal section clearance height H of glass tube2The ratio of (A) to (B) is H1∶H2＝1∶7～12。
5. The assay tube of claim 4, wherein: measuring the height H of the liquid in a glass tube1Equal section clearance height H of glass tube2The ratio of (A) to (B) is H1∶H2＝1∶7～8。
6. The assay tube of claim 4, wherein: taking the unit volume as an example, the measuring solution contains 12 to 24 unit volumes of 0.005 percent of methyl red or methyl orange, 1 to 7 unit volumes of 0.001 percent of o-biserulylamine, and 40 to 85 unit volumes of sulfuric acid with the concentration of 1mol/L, and is prepared by mixing.
7. The assay tube of claim 4, wherein: taking the unit volume as an example, the measuring solution contains 15-20 unit volumes of 0.005% methyl red or methyl orange, 2-5 unit volumes of 0.001% o-biserucyl amine and 50-75 unit volumes of 1mol/L sulfuric acid, and is prepared by mixing.
8. The measuring tube according to claim 4 to 7, wherein: the increase or decrease of the concentration of each effective component in the measuring solution correspondingly reduces or increases the volume of the measuring solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410010123XA CN1310030C (en) | 2004-03-12 | 2004-03-12 | AlO2 assaying liquid and its colorimeteric estimation tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410010123XA CN1310030C (en) | 2004-03-12 | 2004-03-12 | AlO2 assaying liquid and its colorimeteric estimation tube |
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| Publication Number | Publication Date |
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| CN1563979A true CN1563979A (en) | 2005-01-12 |
| CN1310030C CN1310030C (en) | 2007-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB200410010123XA Expired - Fee Related CN1310030C (en) | 2004-03-12 | 2004-03-12 | AlO2 assaying liquid and its colorimeteric estimation tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100510708C (en) * | 2005-11-09 | 2009-07-08 | 白莉 | Aluminium determination solution and colorimetric determination tube therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU716000A1 (en) * | 1978-07-11 | 1980-02-15 | Всесоюзный Научно-Исследовательский Институт Охраны Труда Вцспс | Method of determining chlorine dioxide in air |
| US6252510B1 (en) * | 1998-10-14 | 2001-06-26 | Bud Dungan | Apparatus and method for wireless gas monitoring |
| CN1315135A (en) * | 2000-03-30 | 2001-10-03 | 李天雷 | ClO2 disinfectant and its preparing process and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100510708C (en) * | 2005-11-09 | 2009-07-08 | 白莉 | Aluminium determination solution and colorimetric determination tube therefor |
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| CN1310030C (en) | 2007-04-11 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: ZHENGZHOU WATER TESTING TECHNOLOGY CO., LTD. Assignor: Bai Li Contract fulfillment period: 2009.3.25 to 2014.3.25 contract change Contract record no.: 2009410000016 Denomination of invention: AlO2 assaying liquid and its colorimeteric estimation tube Granted publication date: 20070411 License type: Exclusive license Record date: 2009.3.26 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.25 TO 2014.3.25; CHANGE OF CONTRACT Name of requester: ZHENGZHOU WATER TESTING TECHNOLOGY CO., LTD. Effective date: 20090326 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070411 Termination date: 20150312 |
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| EXPY | Termination of patent right or utility model |