CN212379291U - Device for automatically measuring ions in water by adopting color sensor - Google Patents
Device for automatically measuring ions in water by adopting color sensor Download PDFInfo
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Abstract
The utility model relates to an adopt device of ion in colour sensor automatic measure quality of water, the device is including measuring the pond, set up the agitator in measuring the pond and with standard hydrochloric acid solution feed mechanism, phenolphthalein solution feed mechanism, methyl orange solution feed mechanism of measuring the pond intercommunication, be equipped with colour sensor in the measuring pond, colour sensor passes through signal board connection control system. This patent is through adopting color sensor discernment colour sudden change terminal point, and automatic titration, measurement have replaced manual titration and artifical judgement terminal point completely, accord with relevant standard and method completely, can real-time, accurately measure carbonate, bicarbonate and hydroxyl content in the quality of water.
Description
Technical Field
The utility model belongs to chemistry quality of water analysis field especially relates to an adopt device of carbonate/bicarbonate/hydroxyl ion concentration in colour sensor automatic measure quality of water.
Background
Carbonate and bicarbonate are main anions in separated water in mining industries such as crude oil, and the determination of the concentration of carbonate and bicarbonate in formation water in the mining process is helpful for determining the hardness and the type of the formation water and the amount of carbon dioxide in the separated water. At present, phenolphthalein and methyl orange are used as indicators for measuring carbonate/bicarbonate/hydroxyl in water quality, standard hydrochloric acid with known concentration is used for titration, and because the discoloring pH range of phenolphthalein is 8.2-10.0, the discoloring pH range of methyl orange is 3.1-4.4, and in the discoloring range of the indicators, different personnel judge the problem that the end points are different, so that the error in the use amount of hydrochloric acid is easily caused, and the error exists in the calculation of the content of carbonate/bicarbonate/hydroxyl.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect that prior art exists, provide a method and device that adopt color sensor automated measurement carbonate and bicarbonate in quality of water, moreover, contain a small amount of sulfate radicals, phosphate radical, copper ion, chloride ion, carbon dioxide in the quality of water and also do not influence the survey to carbonate, bicarbonate content. The principle of the utility model is mainly that through the color sensor, an optimal device is TCS34725, replaces the manual work to carry out the automatic judgement of titration terminal point.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a device for automatically measuring ions in water by adopting a color sensor comprises a measuring pool, a stirrer arranged in the measuring pool, and a standard hydrochloric acid solution supply mechanism, a phenolphthalein solution supply mechanism and a methyl orange solution supply mechanism which are communicated with the measuring pool, wherein the measuring pool is internally provided with the color sensor which is connected with a control system through a signal plate;
the standard hydrochloric acid solution supply mechanism comprises a standard hydrochloric acid solution pool and a standard hydrochloric acid solution supply pipe connected with the standard hydrochloric acid solution pool, the end part of the standard hydrochloric acid solution supply pipe is connected with the measuring pool, and a first quantitative pump is mounted on the standard hydrochloric acid solution supply pipe;
the phenolphthalein solution supply mechanism comprises a phenolphthalein solution pool and a phenolphthalein solution supply pipe connected with the phenolphthalein solution pool, the end part of the phenolphthalein solution supply pipe is connected with the measuring pool, and a second quantitative pump is arranged on the phenolphthalein solution supply pipe;
the methyl orange solution supply mechanism comprises a methyl orange solution pool and a methyl orange solution supply pipe connected with the methyl orange solution pool, the end part of the methyl orange solution supply pipe is connected with the measuring pool, and a third quantitative pump is installed on the methyl orange solution supply pipe.
Furthermore, the control system is in signal connection with the stirrer, the first quantitative pump, the second quantitative pump and the third quantitative pump.
Further, the control system is provided with a display screen and a key and is connected with a power supply, wherein the chip model of the control system is i.mx287.
Furthermore, a water inlet, a water outlet and a sewage outlet are arranged on the measuring tank.
Further, the color sensor has a model number of TCS 34725. The color sensor has high detection reliability for similar colors and hues. One preferred color sensor is a red, green, and blue color sensor that achieves color detection by measuring the reflectance of the three primary colors that make up the object's color. Because the color detection method has high precision, the red, green and blue color sensor can accurately distinguish extremely similar colors and even different hues of the same color. The utility model discloses a red green blue color sensor detects the mode of mixed solution colour and confirms to titrate the terminal point.
A method for automatically measuring ions in water by adopting a color sensor comprises the following steps:
s1, taking 0.2-10mL of a water sample to be detected, recording the volume of the water sample to be detected as V, adding 50mL of deionized water which is boiled for 30 minutes, and recording the color value of the mixed solution at the moment as a blank color value;
s2, adding 3 drops of phenolphthalein reagent into the mixed solution in the step S1, and measuring the color value of the mixed solution at the moment and recording the color value as an initial color value;
s3, if the initial color value is colorless, it is indicated that the water sample to be detected does not contain carbonate and only contains bicarbonate, 2 drops of methyl orange solution are added into the water sample to be detected, the solution is yellow, then hydrochloric acid solution with known concentration is automatically added at a certain speed through a first quantitative pump until the color of the water sample to be detected reaches a second characteristic color value, and the volume V of the added hydrochloric acid solution is recorded2And concentration c (hcl);
s4, if the initial color value is pink, automatically adding hydrochloric acid solution with known concentration at a certain speed through a first quantitative pump until the color of the water sample to be detected changes to a first specific color value, and recording the volume V of the added hydrochloric acid solution1And concentration c (hcl);
s5, adding 2 drops of methyl orange solution into the mixed solution obtained in the step S4, recording the color value of the mixed solution after the methyl orange solution is added, continuously and automatically adding hydrochloric acid solution with known concentration at a certain speed through a first quantitative pump until the color of the water sample to be detected reaches a second special color value, and recording the volume V of the added hydrochloric acid solution2And concentration c (HCl).
Wherein the second characteristic color is pink, the first specialty color is a blank color, and the first specialty color and the second specialty color are identified by the color sensor.
Further, the calculation method of the carbonate and bicarbonate content is as follows:
for the water sample to be detected with colorless initial color value in the step of S2: under the condition, the water sample to be detected does not contain carbonate and only contains bicarbonateThe volume of the water sample to be tested in the step S1 is recorded as V, and the volume of the hydrochloric acid standard solution added in the step S3 is recorded as V2The concentration is marked as c (HCl), and the calculation formula is as follows:
ρ(HCO3 -)＝V2×M3×c(HCl)/V
in the formula, ρ (HCO)3 -)——HCO3 -Concentration of (3), g/L; v2-step S3, add volume, mL, of hydrochloric acid standard solution; m3——HCO3 -Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v-volume, mL, of water sample to be tested added in step S1.
Further, for the water sample to be tested with the initial color value of pink in the step S2, the volume V of the hydrochloric acid solution added in the step S4 is determined1And volume V of hydrochloric acid solution added in step S52There are the following three cases:
when V1>V2In solution, OH-And CO3 2-Coexistence of
ρ(OH-)＝(V1-V2)×M1×c(HCl)/V
ρ(CO3 2-)＝V2×M2×c(HCl)/V
In the formula, rho (OH)-)——OH-Concentration of (3), g/L; ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; v1-step S4, add volume, mL, of hydrochloric acid standard solution; v2-step S5, add volume, mL, of hydrochloric acid standard solution; m1——OH-Molar mass of (a), g/mol; m2——CO3 2-Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v, adding the volume, mL, of the water sample to be detected in the step S1;
when V1<V2In solution, HCO3 -And CO3 2-Coexistence of
ρ(CO3 2-)＝V1×M2×c(HCl)/V
ρ(HCO3 -)＝(V2-V1)×M3×c(HCl)/V
Wherein ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; ρ (HCO)3 -)——HCO3 -Concentration of (3), g/L;
V1-step S4, add volume, mL, of hydrochloric acid standard solution; v2-step S5, add volume, mL, of hydrochloric acid standard solution; m2——CO3 2-Molar mass of (a), g/mol; m3——HCO3 -Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v, adding the volume, mL, of the water sample to be detected in the step S1;
③ when V1＝V2When only CO is in solution3 2-
ρ(CO3 2-)＝V1×M2×c(HCl)/V
Wherein ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; v1-step S4, add volume, mL, of hydrochloric acid standard solution; m2——CO3 2-Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v-volume, mL, of water sample to be tested added in step S1.
The utility model has the advantages that: this patent is through adopting color sensor discernment colour sudden change terminal point, and automatic titration, measurement have replaced manual titration and artifical judgement terminal point completely, accord with relevant standard and method completely, can real-time, accurately measure carbonate, bicarbonate and hydroxyl content in the quality of water.
Drawings
Fig. 1 is a schematic structural diagram of the measuring device of the present invention;
fig. 2 is a schematic view of the measurement process of the present invention.
Detailed Description
As shown in fig. 1, a device for automatically measuring ions in water by using a color sensor comprises a measuring pool 1, a stirrer 2 arranged in the measuring pool 1, and a standard hydrochloric acid solution supply mechanism, a phenolphthalein solution supply mechanism and a methyl orange solution supply mechanism which are communicated with the measuring pool 1, wherein the measuring pool 1 is internally provided with the color sensor 3, and the color sensor 3 is connected with a control system 5 through a signal plate 4;
the standard hydrochloric acid solution supply mechanism comprises a standard hydrochloric acid solution pool 6 and a standard hydrochloric acid solution supply pipe 7 connected with the standard hydrochloric acid solution pool 6, the end part of the standard hydrochloric acid solution supply pipe 7 is connected with the measuring pool 1, and a first quantitative pump 8 is arranged on the standard hydrochloric acid solution supply pipe 7;
the phenolphthalein solution supply mechanism comprises a phenolphthalein solution pool 9 and a phenolphthalein solution supply pipe 10 connected with the phenolphthalein solution pool 9, the end part of the phenolphthalein solution supply pipe 10 is connected with the measuring pool 1, and a second quantitative pump 11 is arranged on the phenolphthalein solution supply pipe 10;
the methyl orange solution supply mechanism comprises a methyl orange solution pool 12 and a methyl orange solution supply pipe 13 connected with the methyl orange solution pool 12, wherein the end part of the methyl orange solution supply pipe 13 is connected with the measuring pool 1, and a third quantitative pump 14 is arranged on the methyl orange solution supply pipe 13.
Wherein, the control system 5 is in signal connection with the stirrer 2, the first fixed displacement pump 8, the second fixed displacement pump 11 and the third fixed displacement pump 14. The control system 5 is provided with a display screen and a key 15, the control system 5 is connected with a power supply 16, and the chip model of the control system is i.mx287.
Further, the measuring tank 1 is provided with a water inlet 17, a water outlet 18 and a sewage outlet 19, and the water inlet 17 is used for supplying a water sample to be measured. Color sensor 3 is model number TCS 34725. The color sensor 3 has high detection reliability for similar colors and tones. One preferred color sensor is a red, green, and blue color sensor that achieves color detection by measuring the reflectance of the three primary colors that make up the object's color. Because the color detection method has high precision, the red, green and blue color sensor can accurately distinguish extremely similar colors and even different hues of the same color. The utility model discloses a red green blue color sensor detects the mode of mixed solution colour and confirms to titrate the terminal point.
Further, as shown in fig. 2, a method for automatically measuring ions in water by using a color sensor includes the following steps:
s1, taking 0.2-10mL of a water sample to be detected, recording the volume of the water sample to be detected as V, adding 50mL of deionized water which is boiled for 30 minutes, and recording the color value of the mixed solution at the moment as a blank color value;
s2, adding 3 drops of phenolphthalein reagent into the mixed solution in the step S1, and measuring the color value of the mixed solution at the moment and recording the color value as an initial color value;
s3, if the initial color value is colorless, it is indicated that the water sample to be detected does not contain carbonate and only contains bicarbonate, 2 drops of methyl orange solution are added into the water sample to be detected, the solution is yellow, then hydrochloric acid solution with known concentration is automatically added at a certain speed through a first quantitative pump until the color of the water sample to be detected reaches a second characteristic color value, and the volume V of the added hydrochloric acid solution is recorded2And concentration c (hcl);
s4, if the initial color value is pink, automatically adding hydrochloric acid solution with known concentration at a certain speed through a first quantitative pump until the color of the water sample to be detected changes to a first specific color value, and recording the volume V of the added hydrochloric acid solution1And concentration c (hcl);
s5, adding 2 drops of methyl orange solution into the mixed solution obtained in the step S4, recording the color value of the mixed solution after the methyl orange solution is added, continuously and automatically adding hydrochloric acid solution with known concentration at a certain speed through a first quantitative pump until the color of the water sample to be detected reaches a second special color value, and recording the volume V of the added hydrochloric acid solution2And concentration c (HCl).
Wherein the second characteristic color is pink, the first tailored color is a blank color, and the first tailored color and the second tailored color are recognized by the color sensor 3.
Further, the calculation method of the carbonate and bicarbonate content is as follows:
for the water sample to be detected with colorless initial color value in the step of S2: in this case, the water sample to be measured does not containCarbonate and bicarbonate only, the volume of the water sample to be detected in the step S1 is recorded as V, and the volume of the hydrochloric acid standard solution added in the step S3 is recorded as V2The concentration is marked as c (HCl), and the calculation formula is as follows:
ρ(HCO3 -)＝V2×M3×c(HCl)/V
in the formula, ρ (HCO)3 -)——HCO3 -Concentration of (3), g/L; v2-step S3, add volume, mL, of hydrochloric acid standard solution; m3——HCO3 -Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v-volume, mL, of water sample to be tested added in step S1.
Further, for the water sample to be tested with the initial color value of pink in the step S2, the volume V of the hydrochloric acid solution added in the step S4 is determined1And volume V of hydrochloric acid solution added in step S52There are the following three cases:
when V1>V2In solution, OH-And CO3 2-Coexistence of
ρ(OH-)＝(V1-V2)×M1×c(HCl)/V
ρ(CO3 2-)＝V2×M2×c(HCl)/V
In the formula, rho (OH)-)——OH-Concentration of (3), g/L; ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; v1-step S4, add volume, mL, of hydrochloric acid standard solution; v2-step S5, add volume, mL, of hydrochloric acid standard solution; m1——OH-Molar mass of (a), g/mol; m2——CO3 2-Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v, adding the volume, mL, of the water sample to be detected in the step S1;
when V1<V2In solution, HCO3 -And CO3 2-Coexistence of
ρ(CO3 2-)＝V1×M2×c(HCl)/V
ρ(HCO3 -)＝(V2-V1)×M3×c(HCl)/V
Wherein ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; ρ (HCO)3 -)——HCO3 -Concentration of (3), g/L;
V1-step S4, add volume, mL, of hydrochloric acid standard solution; v2-step S5, add volume, mL, of hydrochloric acid standard solution; m2——CO3 2-Molar mass of (a), g/mol; m3——HCO3 -Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v, adding the volume, mL, of the water sample to be detected in the step S1;
③ when V1＝V2When only CO is in solution3 2-
ρ(CO3 2-)＝V1×M2×c(HCl)/V
Wherein ρ (CO 3)2-)——CO3 2-Concentration of (3), g/L; v1-step S4, add volume, mL, of hydrochloric acid standard solution; m2——CO3 2-Molar mass of (a), g/mol; (HCl) -the concentration of the hydrochloric acid standard solution added in step S3, mol/L; v-volume, mL, of water sample to be tested added in step S1.
The present invention is further described below with reference to specific embodiments, in particular as follows:
example 1
In this example, the initial color of the mixed solution after adding phenolphthalein was pink, and the method for measuring carbonate and bicarbonate in the water sample comprises the following steps:
s1, taking 0.2-10mL of water sample to be tested, recording the actual sampling volume as V, adding 50mL of deionized water which is boiled for 30 minutes, and recording the color value of the solution at the moment as a blank color value;
s2, adding 3 drops of phenolphthalein reagent (150 μ L) to the mixed solution in the step S1 by the second quantitative pump 11, and measuring the color value of the mixed solution at this time, and recording as the initial color value, and at this time, the color value should be pink.
S3, automatically adding hydrochloric acid solution with known concentration at a certain speed through the first quantitative pump 8 until the color of the water sample to be detected changes to a first special color value (blank color value in the step S1), and recording the volume V of the added hydrochloric acid solution1And concentration c (HCl).
S4, adding 2 drops of methyl orange solution (100 mu L) into the mixed solution with the first special color value (blank color value in the step S1) in the step S4 through a third quantitative pump 14, recording the color value of the mixed solution after adding the methyl orange solution, continuously adding hydrochloric acid solution with known concentration at a certain speed through a quantitative pump and other devices until the color of the water sample to be detected reaches the second special color value (pink), and recording the volume V of the added hydrochloric acid solution2And concentration c (HCl).
And S5, calculating the contents of carbonate, bicarbonate and hydroxyl in the water sample. The calculation formula is as follows:
when V1>V2In solution, OH-And CO3 2-Coexistence of
ρ(OH-)＝(V1-V2)×17.01×c(HCl)/V
ρ(CO3 2-)＝V2×60.02×c(HCl)/V
When V1<V2In solution, HCO3 -And CO3 2-Coexistence of
ρ(CO3 2-)＝V1×60.02×c(HCl)/V
ρ(HCO3 -)＝(V2-V1)×61.02×c(HCl)/V
③ when V1＝V2When only CO is in solution3 2-
ρ(CO3 2-)＝V1×60.02×c(HCl)/V
Wherein，ρ(OH-) The concentration of hydroxyl group is expressed in mg/L, rho (CO)3 2-) Represents the concentration of carbonate in mg/L, rho (HCO)3 -) Denotes the concentration of bicarbonate in mg/L, V1、V2And V is in mL, c (HCl) represents the concentration of hydrochloric acid standard solution in mol/L.
Example 2
In this example, the color of the mixed solution after adding phenolphthalein is still a blank color value, i.e., no change, and the method for measuring carbonate, bicarbonate and hydroxyl in the water sample comprises the following steps:
s1, taking 0.2-10mL of water sample to be tested, recording the actual sampling volume as V, adding 50mL of deionized water which is boiled for 30 minutes, and recording the color value of the solution at the moment as a blank color value;
s2, adding 3 drops of phenolphthalein reagent (150 mu L) into the mixed solution in the step S1 through the quantitative pump 2, measuring the color value of the mixed solution at the moment, recording the color value as an initial color value, and keeping the blank color value at the moment, namely, the color is unchanged after the phenolphthalein is added.
S3, adding 2 drops of methyl orange solution (100 mu L) into the mixed solution of the S3 through a quantitative pump 3, recording the color value of the mixed solution after the methyl orange solution is added, then continuously and automatically adding hydrochloric acid solution with known concentration through the quantitative pump 1 at a certain speed until the color of the water sample to be detected reaches a second specially-made color value (pink), and recording the volume V of the added hydrochloric acid solution2And concentration c (HCl).
And S5, calculating the contents of carbonate, bicarbonate and hydroxyl in the water sample. The calculation formula is as follows:
in this case, only HCO is present in the solution3 -：
ρ(HCO3 -)＝V2×61.02×c(HCl)/V
Wherein ρ (HCO)3 -) Denotes the concentration of bicarbonate in mg/L, V1、V2And V is in mL, c (HCl) represents the concentration of hydrochloric acid standard solution in mol/L.
This patent is through adopting color sensor discernment colour sudden change terminal point, and automatic titration, measurement have replaced manual titration and artifical judgement terminal point completely, accord with relevant standard and method completely, can real-time, accurately measure carbonate, bicarbonate and hydroxyl content in the quality of water.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A device for automatically measuring ions in water by adopting a color sensor comprises a measuring pool, a stirrer arranged in the measuring pool, and a standard hydrochloric acid solution supply mechanism, a phenolphthalein solution supply mechanism and a methyl orange solution supply mechanism which are communicated with the measuring pool, and is characterized in that the color sensor is arranged in the measuring pool and is connected with a control system through a signal plate;
the standard hydrochloric acid solution supply mechanism comprises a standard hydrochloric acid solution pool and a standard hydrochloric acid solution supply pipe connected with the standard hydrochloric acid solution pool, the end part of the standard hydrochloric acid solution supply pipe is connected with the measuring pool, and a first quantitative pump is mounted on the standard hydrochloric acid solution supply pipe;
the phenolphthalein solution supply mechanism comprises a phenolphthalein solution pool and a phenolphthalein solution supply pipe connected with the phenolphthalein solution pool, the end part of the phenolphthalein solution supply pipe is connected with the measuring pool, and a second quantitative pump is arranged on the phenolphthalein solution supply pipe;
the methyl orange solution supply mechanism comprises a methyl orange solution pool and a methyl orange solution supply pipe connected with the methyl orange solution pool, the end part of the methyl orange solution supply pipe is connected with the measuring pool, and a third quantitative pump is installed on the methyl orange solution supply pipe.
2. The apparatus of claim 1, wherein the control system is in signal connection with the stirrer, the first quantitative pump, the second quantitative pump, and the third quantitative pump.
3. The device for automatically measuring ions in water by using the color sensor as claimed in claim 1 or 2, wherein the control system is provided with a display screen and a key, the control system is connected with a power supply, and the chip model of the control system is i.mx287.
4. The device for automatically measuring ions in water by using the color sensor as claimed in claim 3, wherein the measuring tank is provided with a water inlet, a water outlet and a sewage outlet.
5. The apparatus as claimed in claim 3, wherein the color sensor is of type TCS 34725.
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Effective date of registration: 20210305 Address after: No.145, jiukeshu, Tongzhou District, Beijing Patentee after: Beijing Institute of chemical metallurgy of nuclear industry Address before: 10 Jinye street, Xihongmen Town, Daxing District, Beijing 100076 Patentee before: HKY TECHNOLOGY Co.,Ltd. |