CN109358050A - Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia - Google Patents
Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia Download PDFInfo
- Publication number
- CN109358050A CN109358050A CN201811547311.4A CN201811547311A CN109358050A CN 109358050 A CN109358050 A CN 109358050A CN 201811547311 A CN201811547311 A CN 201811547311A CN 109358050 A CN109358050 A CN 109358050A
- Authority
- CN
- China
- Prior art keywords
- test paper
- span
- ammonia
- enhanced sensitivity
- strip length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
- G01N2021/7759—Dipstick; Test strip
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
A kind of Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia, belong to environmental monitoring and industrial hygiene technical field.The test paper is the test paper that load has bromocresol green sodium, methyl orange and nonionic surfactant Span in base paper；In mass ratio, bromocresol green sodium: methyl orange: nonionic surfactant Span=(0.8~4): (0.32~1.12): (0.001~0.016).Preparation method are as follows: soak is prepared by reagent proportion, base paper is impregnated, dry plastic packaging.Its method for measuring gaseous ammonia is to be reacted according to ammonia in detection zone air with the reagent of test paper, shows blue-green, according to discoloration strip length to the relationship of ammonia density, obtains the concentration of ammonia in detection zone air.The mixed indicator that the test paper uses, the color addition area of color change interval are less than the color change interval of former single indicator, improve accuracy, and color change is easy to observe.The addition of Span is so that the reaction sensitivity of test paper increases 30%.
Description
Technical field
The invention belongs to environmental monitoring and industrial hygiene technical field, in particular to a kind of Span enhanced sensitivity mixed indicator examination
Paper and its preparation and the method for measuring gaseous ammonia.
Background technique
Ammonia is one of the major pollutants being detrimental to health in air, in air the source of ammonia can be divided into natural origin and
Artificial source's two parts, wherein natural origin can be by two approach, and one is the ammonium salts and nitrate in soil, in high temperature
Ammonia is converted under the natural conditions such as illumination.Another kind is the nitrogen fixation to nitrogen in air of bacterial micro-organism, when these
It is decomposed after biological death, releases ammonia.
The artificial source of ammonia can all make mainly from such as chemical industry, automobile, building decoration, health care, animal husbandry etc.
It makes and generates a certain amount of ammonia and be discharged into environment, in public life, such as the volatilization of the coloring agent of cosmetology, under city
The volatilization of water channel excreta and the ingredient of motor-vehicle tail-gas are all the artificial sources for generating ammonia.
The highest of harmful substance allows in " Design of Industrial Enterprises sanitary standard " regulation workshop air of publication in 2015
Concentration: the standard of ammonia is no more than 30mg/m in air3." indoor air quality hygienic practice " is, it is specified that in room air within 2001
Ammonia density Limited Doses are 0.2mg/m3, the numerical value is far below the minimum concentration that human body can be experienced, about 0.1-1.5mg/m3。
Mainly have to the standard determination method of ammonia in air: GB/T18204.25-2000, the survey of ammonia in public place air
Determine method, indigo spectrophotometry, Berthelot spectrophotometry；HJ533-2009, the survey of air and wasteair ammonia
Fixed-Berthelot spectrophotometry, HJ534-2009 salicylic acid-hypochlorite spectrophotometry.Ammonia in said determination air
Method is required to two processes: the ammonia in air being converted to solution with sampling instrument first, is further carried out corresponding instrument
The measurement of device method.These method high sensitivities, selectivity is good, is widely used.But for production scene because volatilizing, the ammonia of leakage,
It is polluted under such state of emergency with environmental pollution accident to air, the scene that above-mentioned standard method is difficult to meet ammonia is quick
Measurement and emergency monitoring demand.
Ammonia in gas is absorbed into the mixed liquor of sulfuric acid and indicator by someone, according to discoloration Indicator Reaction terminal, needs to lead to
It crosses gas flow measurement and carries out relevant calculation and obtain live ammonia density.It not yet gets rid of first solution to absorb, then the set pattern measured.
Develop it is a kind of can accurately directly, quickly, easy be applied to measurement working site and leakage accident scene ring
The technical method of ammonia content has realistic meaning in the air of border.
Summary of the invention
The invention proposes a kind of Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia, the departments
Class's enhanced sensitivity mixed indicator test paper is the base paper modeling that will load mixed indicator bromocresol green sodium-methyl orange and reagent Span80
Expect film plastic packaging, in use, one end is cut off, the ammonia in air is diffused into the test paper of plastic packaging, is indicated with the mixing on test paper
Agent occurs to become bluish-green metachromasia by orange, and the length of the blue-green discoloration band of generation is in a certain range with ammonia density at just
The relationship of ratio, according to the practical red flavescence of color change interval 3.1-4.4 of indicator methyl orange, when bromocresol green sodium pH=3.8 is in yellow,
It is in blue-green when pH=5.4, when the two is used in mixed way according to suitable ratio, because the color addition area of color change interval is less than former list
The color change interval of one indicator, which improves accuracy.It is improved so mixed indicator bromocresol green sodium-methyl orange has
The accuracy of instruction, and color change is easy to the characteristics of observing.
Reagent Span80 in test paper is that nonionic surfactant has increasing steady, and sensitization, experiment shows for same
The ammonia of isoconcentration measures, and the addition of Span80 is increased than the reaction sensitivity of mixed indicator test paper of Span80 is not added
30%.
The present invention provides a kind of Span enhanced sensitivity mixed indicator test paper, have bromocresol green sodium, methyl for load in base paper
The test paper of orange and nonionic surfactant Span；Wherein, in mass ratio, bromocresol green sodium: methyl orange: non-ionic surface active
Agent Span=(0.8~4): (0.32~1.12): (0.001~0.016).
The nonionic surfactant Span, preferably Span80.
The Span enhanced sensitivity mixed indicator test paper, base paper are chromatography filter paper item, qualitative filter paper item, quantitative filter paper article
One of.
The Span enhanced sensitivity mixed indicator test paper, specification are preferably a length of 60mm~100mm, width be 3mm~
5mm。
The Span enhanced sensitivity mixed indicator test paper, the concentration range of linearity for detecting ammonia in air is 6.0mg/m3~
46mg/m3, detect and be limited to 2.0mg/m3。
The preparation method of Span enhanced sensitivity mixed indicator test paper of the invention, comprising the following steps:
Step 1: preparing soak
Bromocresol green sodium, methyl orange are dissolved in no ammonium hydroxide, is uniformly mixed, obtains bromocresol green sodium-methyl orange aqueous solution；
Into bromocresol green sodium-methyl orange aqueous solution, nonionic surfactant Span aqueous solution is added, mixing is equal
It is even, obtain soak；Wherein, in every liter of soak, the content of the ingredient and each ingredient that contain are as follows: bromocresol green sodium is 0.8
~4g, methyl orange are 0.32~1.12g, and nonionic surfactant Span is 0.001~0.016g；
Step 2: impregnating
Base paper is placed in soak and is impregnated, the test strips after being impregnated；Wherein, soaking time is that base paper absorbs immersion
Until liquid reaches saturation；
Step 3: dry plastic packaging
After the test strips drying after immersion, in 130~150 DEG C of progress plastic packagings, the examination of Span enhanced sensitivity mixed indicator is obtained
Paper.
In the step 1, in nonionic surfactant Span aqueous solution, the quality of nonionic surfactant Span
Concentration is 0.05%~0.2%.
In the step 2, the soaking time >=15min.
In the step 2, the soaking temperature is 10~90 DEG C.
In the step 3, the drying is dried or is dried for room temperature.
In the step 3, the drying, specifically: the test strips after immersion are placed in constant temperature oven, in 40-
100 DEG C of 5~30min of drying.
In the step 3, the plastic packaging is to be placed in the test paper after drying between two plastic packaging films, using plastic packaging
Machine carries out plastic packaging press mold.
The Span enhanced sensitivity mixed indicator test paper, specification can be cut before drying plastic packaging, can also be
It is cut before impregnating.
In the present invention, the water removes specified otherwise, refers both to no ammonium hydroxide.
The method of the measurement gaseous ammonia of Span enhanced sensitivity mixed indicator test paper of the invention, comprising the following steps:
(1) one end of Span enhanced sensitivity mixed indicator test paper is cut off, is placed on detection zone, ammonia in detection zone air
It is reacted with reagent contained by Span enhanced sensitivity mixed indicator test paper, test paper shows blue-green, reacts 20~30min, reads blue-green
Along the length of test paper variation, for the strip length that changes colour；
(2) is measured by discoloration strip length, detection zone can be obtained for the relationship of ammonia density according to the discoloration strip length of test paper
The concentration of ammonia in the air of domain.
In the method for the measurement gaseous ammonia of the Span enhanced sensitivity mixed indicator test paper, take at least two Span enhanced sensitivities mixed
It closes indicator paper to be measured, is averaged, error can be reduced.
The discoloration strip length of the test paper can indicate the relationship of ammonia density using one of following four mode:
The first, according to the standard series concentration experiment of ammonia, obtain discoloration strip length and ammonia concentration in air it is linear
Regression equation；Reaction discoloration strip length, which is acquired, by regression equation corresponds to ammonia density.
Second, according to the standard series concentration experiment of ammonia, obtained discoloration strip length is corresponding with ammonia concentration in air
Relationship makes ammonia density-discoloration strip length table, acquires ammonia concentration in air according to reaction discoloration strip length using interpolation method.
The third, according to the equation of linear regression of discoloration strip length and ammonia concentration in air, ammonia surveyors' staff obtained；Benefit
Ammonia density corresponding to discoloration strip length is reacted with tape measure.
It 4th kind, according to the equation of linear regression of discoloration strip length and ammonia concentration in air, is directly mixed in Span enhanced sensitivity
The measuring scale of ammonia density is marked on indicator paper.
Equation of linear regression or ammonia density-discoloration strip length table of the discoloration strip length and ammonia concentration in air,
It is obtained according to following experiment:
(1) one end of n Span enhanced sensitivity mixed indicator test paper is cut off, is placed in the air bottle of same known ammonia density
In, 20~30min of reaction takes out, meanwhile, it marks in the discoloration band intersection of test paper, is brought with preventing the length of colour band from will increase
Error, measure discoloration strip length with lattice ruler, when measurement should ensure that the zero graduation line of the opening dative ruler of test paper is overlapped record number
According to, take the average value of n test paper parallel laboratory test as discoloration strip length foundation；Wherein, n >=3；
(2) step (1) is repeated, the content of the ammonia known to detection difference in the air bottle of ammonia density obtains discoloration belt length
The relation table of degree and ammonia concentration in air content, i.e. ammonia density-discoloration strip length table, acquire discoloration strip length and ammonia in air is dense
The equation of linear regression of degree；
(3) in the detection process, the ammonia density range of linearity of measurement is 6.0~46mg/m3.Test paper is to 2.0mg/m3Ammonia
Pale blue green is presented, but the strip length that changes colour is unable to Accurate Determining, it is possible to determine that the detection of test paper is limited to 2.0mg/m3.It is right
15mg/m3Ammonia density be measured in parallel 5 times, relative standard deviation RSD be 2.98%.
Span enhanced sensitivity mixed indicator test paper of the invention and its preparation and the method for measuring gaseous ammonia, its advantages
Are as follows:
1, Span enhanced sensitivity mixed indicator test paper of the invention, is according to ammonia and mixed indicator bromocresol green sodium and methyl
Orange effect, is presented glaucous principle and is made.The remolding sensitivity that Span80 contained by the test paper can be such that test paper reacts with ammonia is not added
The test paper of Span80 improves 30% or more.The test paper becomes simple, intuitive and effective to the mensuration mode of ammonia in air.
2, the present invention realizes the accurate measurement to the simple on-site of ammonia in air.To 15mg/m3Ammonia in air is flat
Row measurement 5 times, relative standard deviation RSD are 2.98%.The ammonia density range of measurement is 6.0~46mg/m3.The detection limit of test paper
For 2.0mg/m3。
3, test paper of the present invention can be widely used for ammonia content measurement and NH_3 leakage pollution in various workplace airs
In the emergency monitoring of the scene of the accident, has practicability.
4, it the present invention provides a kind of Span enhanced sensitivity mixed indicator test paper, is reacted by ammonia and to be generated with institute invention test paper
Discoloration reads ammonia content with corresponding ammonia scale, and one step of measurement is completed, and may be directly applied to on-site measurement.
5, Span enhanced sensitivity mixed indicator test paper according to the present invention precision with higher, manufacture craft is simple,
It is low in cost, it is easy to detect the features such as.
Specific embodiment
Technical solution of the present invention and detection method are further elaborated combined with specific embodiments below.
Embodiment 1
Span enhanced sensitivity mixed indicator test paper has bromocresol green sodium to load in base paper, the test paper of methyl orange and Span80,
Wherein, in mass ratio, bromocresol green sodium: methyl orange: Span80=1.0:0.35:0.002.
It is base paper, a length of 80mm, width 3mm that the Span enhanced sensitivity mixed indicator test paper, which is by chromatography filter paper item,.
The preparation method of Span enhanced sensitivity mixed indicator test paper, comprising the following steps:
Step 1, soak is prepared
By bromocresol green sodium, methyl orange is soluble in water, mixes, obtains bromocresol green sodium-methyl orange aqueous solution；To bromine cresols
In green sodium-methyl orange aqueous solution, the Span80 aqueous solution that mass concentration is 0.1% is added, is uniformly mixed, obtains soak；
Wherein, in every liter of soak, the content of the ingredient and each ingredient that contain are as follows: bromocresol green sodium is 1.0g, and methyl orange is
0.35g: span80 0.002g；
Step 2, it impregnates
Chromatography filter paper is cut to the test strips of long 80mm, width 3mm, is placed in soak and impregnates, the examination after being impregnated
Paper slip；Wherein, soaking temperature is room temperature, soaking time 15min；
Step 3, plastic packaging is dried
Test strips after immersion are dried into 15min in 80 DEG C of insulating box, using plastic packaging machine in 140 DEG C of progress plastic packaging pressures
Film obtains Span enhanced sensitivity mixed indicator test paper.
The method of the measurement gaseous ammonia of Span enhanced sensitivity mixed indicator test paper, comprising the following steps:
(1) one end of two Span enhanced sensitivity mixed indicator test paper plastic packaging items is cut off respectively, is placed on detection zone, examined
It surveys ammonia in air to react with the reagent in test paper of the present invention, test paper shows blue-green, after reacting 20min, reads blue-green along test paper
The length of variation, with surveyors' staff measure it corresponding to ammonia density number；
(2) it according to the numerical value of two measured ammonia density test paper, averages, according to ammonia concentration in air and discoloration band
The ammonia density of length-length table acquires ammonia concentration in air using interpolation method, and the dense of ammonia in detection zone air can be obtained
Degree.
The ammonia density-length table is according to experiment, and different ammonia densities reacts the difference generated with test paper in air
Discoloration strip length, make ammonia density-length table, using interpolation method, ammonia concentration in air acquired according to discoloration strip length.
The ammonia density-discoloration strip length table is obtained according to following experiment:
(1) one end of 5 Span enhanced sensitivity mixed indicator test paper is cut off, is placed in the air bottle of same known ammonia density
In, reaction 20min takes out, meanwhile, it is marked in the discoloration band intersection of test paper, to prevent the length of colour band to be slowly increased bring
Error measures discoloration strip length with lattice ruler, and when measurement should ensure that the zero graduation line of the opening dative ruler of test paper is overlapped record data,
Take the average value of 5 test paper parallel laboratory tests as discoloration belt length angle value；
(2) step (1) is repeated, the content of the ammonia known to detection difference in the air bottle of ammonia density is become accordingly
Colour band length makes ammonia density-discoloration strip length table.
Embodiment 2
Span enhanced sensitivity mixed indicator test paper has bromocresol green sodium to load in base paper, the test paper of methyl orange and Span80,
Wherein, in mass ratio, bromocresol green sodium: methyl orange: Span80=3.0:1.0:0.015.
The Span enhanced sensitivity mixed indicator test paper is using chromatography filter paper item as base paper, a length of 100mm, width 4mm.
The preparation method of Span enhanced sensitivity mixed indicator test paper, comprising the following steps:
Step 1, soak is prepared
By bromocresol green sodium, methyl orange is soluble in water, mixes, obtains bromocresol green sodium-methyl orange aqueous solution；To bromine cresols
In green sodium-methyl orange aqueous solution, the Span80 aqueous solution that mass concentration is 0.1% is added, is uniformly mixed, obtains soak；
Wherein, in every liter of soak, the content of the ingredient and each ingredient that contain are as follows: bromocresol green sodium is 3.0g, and methyl orange is
1.0g: span80 0.015g；
Step 2, it impregnates
Chromatography filter paper is cut to the test strips of long 100mm, width 4mm, is placed in soak and impregnates, the examination after being impregnated
Paper slip；Wherein, soaking temperature is room temperature, soaking time 20min；
Step 3, plastic packaging is dried
Test strips after immersion are dried into 10min in 90 DEG C of insulating box, using plastic packaging machine in 140 DEG C of progress plastic packaging pressures
Film obtains Span enhanced sensitivity mixed indicator test paper.
The method of the measurement gaseous ammonia of Span enhanced sensitivity mixed indicator test paper, comprising the following steps:
(1) one end of two class's enhanced sensitivity mixed indicator test paper plastic packaging items is cut off respectively, is placed on detection zone, air
Middle ammonia is reacted with the reagent in test paper of the present invention, and test paper shows blue-green, after reacting 25min, is read blue-green respectively and is become along test paper
The length of change is recorded as discoloration strip length；
(2) average value of two test paper discoloration strip lengths is taken；According to the discoloration strip length of ammonia concentration in air and test paper
Equation of linear regression acquires ammonia concentration in air, and the concentration of ammonia in detection zone air can be obtained.
The equation of linear regression of the discoloration strip length and ammonia concentration in air, obtains according to following experiment:
(1) test paper one end that 5 quantitative determine ammonia in air is cut off, is placed in the air bottle of same known ammonia density,
25min is reacted to take out, meanwhile, it is marked in the discoloration band intersection of test paper, to prevent the length of colour band is possible to be slowly increased band
The error come measures discoloration strip length with precision gauge, and when measurement should ensure that the opening of test paper is overlapped with the zero graduation line of scale
Data are recorded, the average value of 5 test paper parallel laboratory tests is sought；
(2) step (1) is repeated, the content of the ammonia known to detection difference in the air bottle of ammonia density obtains discoloration belt length
The relationship of degree and ammonia concentration in air content, acquires regression equation:
Y=1.08x-1.02
In formula, x is ammonia density, unit mg/m3；
Y is the discoloration strip length of discoloration test paper, unit mm；
The related coefficient of ammonia concentration is 0.991 in the discoloration strip length and air of discoloration test paper.
The corresponding ammonia density of reaction discoloration strip length is acquired by above-mentioned regression equation.
Embodiment 3
A kind of Span enhanced sensitivity mixed indicator test paper, with embodiment 1.
A kind of preparation method of Span enhanced sensitivity mixed indicator test paper, with embodiment 1.
A kind of method of the detection gaseous ammonia of Span enhanced sensitivity mixed indicator test paper, with embodiment 1, the difference is that,
According to the equation of linear regression of discoloration strip length and ammonia concentration in air, ammonia surveyors' staff obtained；It is reacted using tape measure
Change colour ammonia density corresponding to strip length.
Embodiment 4
A kind of Span enhanced sensitivity mixed indicator test paper, with embodiment 1.
A kind of preparation method of Span enhanced sensitivity mixed indicator test paper, with embodiment 1.
A kind of method of the detection gaseous ammonia of Span enhanced sensitivity mixed indicator test paper, with embodiment 1, the difference is that,
According to the equation of linear regression of discoloration strip length and ammonia concentration in air, directly marked on Span enhanced sensitivity mixed indicator test paper
The measuring scale of ammonia density.
Claims (10)
1. a kind of Span enhanced sensitivity mixed indicator test paper, which is characterized in that the Span enhanced sensitivity mixed indicator test paper is in base paper
Load has the test paper of bromocresol green sodium, methyl orange and nonionic surfactant Span；Wherein, in mass ratio, bromocresol green sodium:
Methyl orange: nonionic surfactant Span=(0.8~4): (0.32~1.12): (0.001~0.016).
2. Span enhanced sensitivity mixed indicator test paper as described in claim 1, which is characterized in that the non-ionic surface active
Agent Span is Span80.
3. Span enhanced sensitivity mixed indicator test paper as described in claim 1, which is characterized in that the Span enhanced sensitivity mixing refers to
Show agent test paper, base paper is one of chromatography filter paper item, qualitative filter paper item, quantitative filter paper article；The Span enhanced sensitivity mixing
Indicator paper, specification are a length of 60mm~100mm, and width is 3mm~5mm.
4. Span enhanced sensitivity mixed indicator test paper as described in claim 1, which is characterized in that the Span enhanced sensitivity mixing refers to
Show agent test paper, the concentration range of linearity for detecting ammonia in air is 6.0mg/m3~46mg/m3, detect and be limited to 2.0mg/m3。
5. the preparation method of Span enhanced sensitivity mixed indicator test paper described in claim 1-4 any one, which is characterized in that packet
Include following steps:
Step 1: preparing soak
Bromocresol green sodium, methyl orange are dissolved in no ammonium hydroxide, is uniformly mixed, obtains bromocresol green sodium-methyl orange aqueous solution；
Into bromocresol green sodium-methyl orange aqueous solution, nonionic surfactant Span aqueous solution is added, is uniformly mixed, obtains
To soak；Wherein, in every liter of soak, the content of the ingredient and each ingredient that contain are as follows: bromocresol green sodium is 0.8~4g,
Methyl orange is 0.32~1.12g, and nonionic surfactant Span is 0.001~0.016g；
Step 2: impregnating
Base paper is placed in soak and is impregnated, the test strips after being impregnated；Wherein, soaking time is that base paper absorption soak reaches
Until saturation；
Step 3: dry plastic packaging
After the test strips drying after immersion, in 130~150 DEG C of progress plastic packagings, Span enhanced sensitivity mixed indicator test paper is obtained.
6. the preparation method of Span enhanced sensitivity mixed indicator test paper as claimed in claim 5, which is characterized in that the step
In 1, in nonionic surfactant Span aqueous solution, the mass concentration of nonionic surfactant Span is 0.05%~
0.2%.
7. the preparation method of Span enhanced sensitivity mixed indicator test paper as claimed in claim 5, which is characterized in that the step
In 2, the immersion, soaking time >=15min, soaking temperature is 10~90 DEG C.
8. the preparation method of Span enhanced sensitivity mixed indicator test paper as claimed in claim 5, which is characterized in that the step
In 3, the drying is dried or is dried for room temperature；The drying, specifically: the test strips after immersion are placed in constant temperature and are dried
In case, in 40-100 DEG C of 5~30min of drying；
The plastic packaging is placed in the test paper after drying between two plastic packaging films, carries out plastic packaging press mold using plastic packaging machine；
The Span enhanced sensitivity mixed indicator test paper, specification cut before drying plastic packaging, or cut before immersion.
9. the method for the measurement gaseous ammonia of Span enhanced sensitivity mixed indicator test paper described in claim 1-4 any one, special
Sign is, comprising the following steps:
(1) one end of Span enhanced sensitivity mixed indicator test paper is cut off, is placed on detection zone, ammonia and department in detection zone air
Reagent reaction, test paper contained by class's enhanced sensitivity mixed indicator test paper show blue-green, react 20~30min, read blue-green along examination
The length of paper variation, for the strip length that changes colour；
(2) discoloration strip length is measured to the relationship of ammonia density according to the discoloration strip length of test paper, detection zone sky can be obtained
The concentration of ammonia in gas；
The discoloration strip length of the test paper indicates the relationship of ammonia density using one of following four mode:
The first, is according to the standard series concentration experiment of ammonia, the linear regression of obtained discoloration strip length and ammonia concentration in air
Equation；Reaction discoloration strip length, which is acquired, by regression equation corresponds to ammonia density；
Second, according to the standard series concentration experiment of ammonia, the corresponding relationship of obtained discoloration strip length and ammonia concentration in air,
Ammonia density-discoloration strip length table is made, ammonia concentration in air is acquired according to reaction discoloration strip length using interpolation method；
The third, according to the equation of linear regression of discoloration strip length and ammonia concentration in air, ammonia surveyors' staff obtained；Utilize mark
Ammonia density corresponding to ruler measurement reaction discoloration strip length；
It 4th kind, according to the equation of linear regression of discoloration strip length and ammonia concentration in air, directly mixes and indicates in Span enhanced sensitivity
The measuring scale of ammonia density is marked on agent test paper.
10. the method for the measurement gaseous ammonia of Span enhanced sensitivity mixed indicator test paper as claimed in claim 9, which is characterized in that
Equation of linear regression or ammonia density-discoloration strip length table of the discoloration strip length and ammonia concentration in air, according to following
Experiment obtains:
(1) one end of n Span enhanced sensitivity mixed indicator test paper is cut off, is placed in the air bottle of same known ammonia density, instead
20~30min is answered to take out, meanwhile, it marks in the discoloration band intersection of test paper, is missed with preventing the length of colour band from will increase bring
Difference measures discoloration strip length with lattice ruler, and when measurement should ensure that the zero graduation line of the opening dative ruler of test paper is overlapped record data, take
Foundation of the average value of n test paper parallel laboratory test as discoloration strip length；Wherein, n >=3；
(2) repeat step (1), detection difference known to ammonia density air bottle in ammonia content, obtain discoloration strip length with
The relation table of ammonia concentration in air content, i.e. ammonia density-discoloration strip length table, and acquire discoloration strip length and ammonia concentration in air
Equation of linear regression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547311.4A CN109358050A (en) | 2018-12-18 | 2018-12-18 | Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547311.4A CN109358050A (en) | 2018-12-18 | 2018-12-18 | Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109358050A true CN109358050A (en) | 2019-02-19 |
Family
ID=65329026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811547311.4A Withdrawn CN109358050A (en) | 2018-12-18 | 2018-12-18 | Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109358050A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117074398A (en) * | 2023-10-12 | 2023-11-17 | 天津力神电池股份有限公司 | Pre-lithiated material effectiveness detection method and pole piece pre-lithiated material detection method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535248A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | A kind of test paper and its preparation and detection method of detection ammonia concentration in air |
| CN108535246A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | The test paper of semiquantitative determination ammonia concentration in air and its preparation and assay method |
-
2018
- 2018-12-18 CN CN201811547311.4A patent/CN109358050A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535248A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | A kind of test paper and its preparation and detection method of detection ammonia concentration in air |
| CN108535246A (en) * | 2018-04-18 | 2018-09-14 | 沈阳理工大学 | The test paper of semiquantitative determination ammonia concentration in air and its preparation and assay method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117074398A (en) * | 2023-10-12 | 2023-11-17 | 天津力神电池股份有限公司 | Pre-lithiated material effectiveness detection method and pole piece pre-lithiated material detection method |
| CN117074398B (en) * | 2023-10-12 | 2024-01-12 | 天津力神电池股份有限公司 | Pre-lithiated material effectiveness detection method and pole piece pre-lithiated material detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Engel et al. | Printed sensor labels for colorimetric detection of ammonia, formaldehyde and hydrogen sulfide from the ambient air | |
| US6149865A (en) | Test strips for the determination of the ionic strength or specific gravity of an aqueous sample | |
| CN108776132A (en) | The simple test paper of ammonia and its preparation and assay method in a kind of measurement air | |
| CN108535246A (en) | The test paper of semiquantitative determination ammonia concentration in air and its preparation and assay method | |
| SE7512219L (en) | PROCEDURE AND DEVICE FOR ANALYSIS. | |
| CN109358050A (en) | Span enhanced sensitivity mixed indicator test paper and its preparation and the method for measuring gaseous ammonia | |
| CN108535248A (en) | A kind of test paper and its preparation and detection method of detection ammonia concentration in air | |
| Li et al. | Scanning optical sensor for the measurement of dissolved oxygen and BOD | |
| US6436716B1 (en) | Aldehyde test strip | |
| CN108535247A (en) | The sensitive test paper of ammonia and its preparation and assay method in a kind of measurement air | |
| CN109358051A (en) | Survey the chain alkyl trimethyl ammonium enhanced sensitivity mix reagent test paper and preparation method of ammonia in air | |
| CN111024687B (en) | Glutaraldehyde determination test paper and rapid determination method | |
| CN109358047A (en) | Survey the SDBS enhanced sensitivity mix reagent test paper of ammonia and preparation and detection method in air | |
| CN109358053A (en) | Dry method measures the steady test paper of increasing of ammonia and its preparation and detection method in air | |
| ATE302946T1 (en) | METHOD AND DEVICE FOR DETERMINING AT LEAST ONE PARAMETER OF A MIXTURE FORMULA OF A MIXTURE COMPRISING A CARRIER, WATER AND GAS | |
| CN109358046A (en) | The mixed indicator test paper of measurement ammonia concentration in air and its preparation and detection method | |
| CN108802022A (en) | The simple measuring test paper of ammonia and its preparation and assay method in a kind of air | |
| CN109358052A (en) | Survey the chain alkyl trimethyl ammonium enhanced sensitivity mixed indicator test paper and preparation method of gaseous ammonia | |
| CN108508008B (en) | Test paper for quantitatively determining ammonia in air and preparation and determination methods thereof | |
| CN109580610A (en) | Zeph enhanced sensitivity mixed indicator test paper and preparation and the method for measuring gaseous ammonia | |
| CN109358054A (en) | Dry method surveys the high-precision mixed indicator test paper of ammonia and preparation and detection method in air | |
| CN109358048A (en) | Survey the chain alkyl pyridine enhanced sensitivity mixed indicator test paper and its preparation method of ammonia in air | |
| CN109358055A (en) | Enhanced sensitivity measures the mixed indicator test paper of ammonia and its preparation and detection method in air | |
| CN109358049A (en) | The mixed indicator test paper of ammonia and its preparation and measuring method in sensitive determination air | |
| Niessner | Quantitative determination of phosgene doses by reflectometric badge readout |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190219 |
|
| WW01 | Invention patent application withdrawn after publication |