CN104111252A - Novel ammonia-gas sensitive electrode - Google Patents
Novel ammonia-gas sensitive electrode Download PDFInfo
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- CN104111252A CN104111252A CN201310138474.8A CN201310138474A CN104111252A CN 104111252 A CN104111252 A CN 104111252A CN 201310138474 A CN201310138474 A CN 201310138474A CN 104111252 A CN104111252 A CN 104111252A
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- photoelectric sensor
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Abstract
A disclosed novel ammonia-gas sensitive electrode comprises an outer electrode housing, an electrode film cap, a photoelectric sensor, an ammonia molecule indicator, a controller and an electrode cap, and the electrode cap is arranged at one end of the outer electrode housing and is provided with a selective breathable film allowing passing of ammonia gas. When an ammonium molecule in a water sample or an ammonium molecule generated from ammonia nitrogen in other forms through reaction penetrates the selective breathable film and enters the ammonium molecule indicator, the ammonium molecule indicator has a color development reaction; the photoelectric sensor generates a corresponding electric signal according to the variation of transmitted light intensity; the controller adjusts the intensity of the light signal, performing filtering amplification on the generated electric signal, and transmits the processed electric signal to a processor; and the processor acquires the concentration of ammonia nitrogen in the water sample. The electrode cap is arranged at the other end of the outer electrode housing, and is used to seal the photoelectric sensor in the outer electrode housing. By using the ammonia-gas sensitive electrode, the ammonia-nitrogen content in the water sample can be effectively detected.
Description
Technical field
The present invention relates to water quality detection field, particularly relate to a kind of novel ammonia gas-sensing electrode.
Background technology
When water quality is detected, often can use ammonia gas-sensing electrode, to realize the detection to the content of ammonia nitrogen in water.
During the content of ammonia gas-sensing electrode ammonia nitrogen in measuring water sample, simple to operate, need not carry out pre-service to water sample, saved the operation of flocculation sediment and filtration, saved analysis time, be applicable to the mensuration to ammonia-nitrogen content in water sample in enormous quantities, especially for the complicated water sample of high concentration, when detecting, there is superiority, possess pollution less, the fast advantage of reaction velocity.
Therefore, along with to the going deep into of water quality detection, the development of ammonia gas-sensing electrode also becomes a study hotspot.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of novel ammonia gas-sensing electrode, specific embodiments is as follows:
A novel ammonia gas-sensing electrode, comprising:
External electrode housing;
Be arranged on the electrode film cap of described external electrode housing one end, described electrode film cap is provided with the selectivity breathable films that allows ammonia to pass through;
Be arranged on the photoelectric sensor of described external electrode enclosure interior, and the inner amino molecule indicator of filling of described photoelectric sensor, described photoelectric sensor produces light signal, to form transmitted light, and when seeing through described selectivity breathable films, ammonia entering described amino molecule indicator, cause described amino molecule indicator generation chromogenic reaction, described photoelectric sensor is according to before and after chromogenic reaction, and the variation of optical signal transmissive power produces corresponding electric signal;
Be connected with described photoelectric sensor, control the power of the light signal of described photoelectric sensor generation, described electric signal is carried out to filter and amplification, and by the electric signal transmission after described filter and amplification the controller to processor, described processor is after receiving described electric signal, according to absorbance after the colour developing of described electric signal calculating amino molecule indicator, to obtain corresponding ammonia nitrogen concentration;
Be arranged on the other end of described external electrode housing, described photoelectric sensor be sealed in to the electrode cap of described external electrode enclosure interior.
Preferably, described photoelectric sensor comprises:
Photoelectric sensor housing;
Be arranged on described photoelectric sensor housing one end, produce the light source of light signal;
Be arranged on the described photoelectric sensor housing other end, when the color of described amino molecule indicator changes, the power of experiencing described optical signal transmissive changes, and according to the variation of described transmitted light, produces the photoelectric detector of corresponding electric signal.
Preferably, described controller comprises:
Be connected with described light source, according to the light intensity regulating information receiving, regulate the light source controller of described light signal strength;
Be connected with described photoelectric detector, the electric signal that described photoelectric detector is produced filters and amplifies processing, and by the electric signal transmission after processing the photo controller to described processor.
Preferably, described light source controller comprises:
DAC regulator.
Preferably, described photo controller comprises:
The described electric signal that described photoelectric detector is produced amplifies the operational amplifier of processing;
Be connected with described operational amplifier, the wave filter that the electric signal after amplifying is carried out to filtering processing.
Preferably, it is inner or be arranged on the outside of described external electrode housing that described controller is arranged on described photoelectric sensor.
Preferably, described light source is:
Secondary color light source and be arranged on the monochromator outside described secondary color light source, or LED.
Preferably, described photoelectric detector is:
Silicon photo diode.
The disclosed novel ammonia gas-sensing electrode of the application, comprise external electrode housing, electrode film cap, photoelectric sensor, amino molecule indicator, controller and electrode cap, wherein, described electrode film cap is arranged on one end of described external electrode housing, and is provided with the selectivity breathable films that allows ammonia to pass through.The ammonia producing when water sample ammonia nitrogen to be detected and alkali reaction sees through described selectivity breathable films and enters after described amino molecule indicator, can cause described amino molecule indicator generation chromogenic reaction; Described photoelectric sensor produces light signal, and the variation of the transmitted intensity causing according to the change color of described amino molecule indicator, produces corresponding electric signal; Described controller is for regulating the power of light signal, and the described electric signal producing is carried out to filter and amplification, by the electric signal transmission after filter and amplification to processor, so that described processor obtains the concentration of ammonia nitrogen in water sample; Described electrode cap arranges the other end of described external electrode housing, for described photoelectric sensor being sealed in to described external electrode enclosure interior.By this novel ammonia gas-sensing electrode, can effectively detect the ammonia-nitrogen content in water sample.
In addition, with respect to electrochemical sensor, the applied photoelectric sensor of the application has stronger stability, and longer serviceable life, has improved the quality of ammonia gas-sensing electrode.And described photoelectric sensor is when detecting, measurement range internal linear correlativity is better, is conducive to processor and obtains more accurate measurement result.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the disclosed a kind of novel ammonia gas-sensing electrode of the embodiment of the present invention;
Fig. 2 is the structural representation of photoelectric sensor in the disclosed a kind of novel ammonia gas-sensing electrode of the embodiment of the present invention;
Fig. 3 is the annexation schematic diagram of the disclosed a kind of photoelectric sensor of the embodiment of the present invention and controller;
Fig. 4 is the annexation schematic diagram of disclosed another photoelectric sensor of the embodiment of the present invention and controller.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In order to realize the detection to ammonia nitrogen concentration in water sample, this programme discloses a kind of novel ammonia gas-sensing electrode, structural representation shown in Figure 1, described novel ammonia gas-sensing electrode comprises: external electrode housing 1, electrode film cap 2, photoelectric sensor 3, amino molecule indicator, controller 4 and electrode cap 5.
Wherein, described electrode film cap 2 is arranged on one end of described external electrode housing, is provided with the selectivity breathable films that allows ammonia to pass through on described electrode film cap 2.Because allowing ammonia, passes through this selectivity breathable films, no thoroughfare for water and ion, and the amino molecule in water sample or the ammonia nitrogen of depositing with all the other forms taxes can generate ammonia by reaction, as added alkaline solution in water sample to be detected, after NaOH solution, KOH solution, the ammonium ion NH in water sample
4 +can change ammonia NH into
3overflow, see through described selectivity breathable films, enter described ammonia gas-sensing electrode inner, be convenient to described photoelectric sensor 3 it is detected.
Described photoelectric sensor 3 is arranged on the inside of described external electrode housing, and, the inside of described photoelectric sensor 3 is filled with amino molecule indicator, when ammonia enters described amino molecule indicator through the selectivity breathable films arranging on described electrode film cap 2, can cause described amino molecule indicator generation chromogenic reaction, the variation of color occurs.Described photoelectric sensor 3 is for generation of light signal, to form transmitted light, and seeing through described selectivity breathable films when ammonia, enter described amino molecule indicator, while causing described amino molecule indicator to occur to show reaction, described photoelectric sensor 3 is according to before and after chromogenic reaction, and the variation of optical signal transmissive power produces corresponding electric signal.
Described amino molecule indicator and the amino molecule generation chromogenic reaction that sees through selectivity breathable films, can cause change color, and the depth of color is directly proportional to seeing through amino molecule amount, therefore, the content that can reflect amino molecule by described change color, and then the concentration of ammonia nitrogen in reaction water body.In addition, this chromogenic reaction is reversible reaction, that is to say, when amino molecule content in water sample is less, amino molecule can enter in described water sample by selectivity breathable films.
Described controller 4 is connected with described photoelectric sensor 3, for controlling the power of the light signal of described photoelectric sensor 3 generations, described electric signal is carried out to filter and amplification, and by the electric signal transmission after described filter and amplification to processor, wherein, described processor is realized in a variety of forms, for example, can be single-chip microcomputer, PC(personal computer, personal computer), industrial computer etc.Described processor, after receiving described electric signal, according to absorbance after the colour developing of described electric signal calculating amino molecule indicator, to obtain corresponding ammonia nitrogen concentration, is realized the detection to water sample.
Described electrode cap 5 is arranged on the other end of described external electrode housing, for described photoelectric sensor 3 being sealed in to the inside of described external electrode housing 3, to avoid water sample to be detected to enter in external electrode housing 3, affects accuracy of detection.
The disclosed novel ammonia gas-sensing electrode of the application, comprise external electrode housing, electrode film cap, photoelectric sensor, amino molecule indicator, controller and electrode cap, wherein, described electrode film cap is arranged on one end of described external electrode housing, and is provided with the selectivity breathable films that allows ammonia to pass through.When water sample to be detected sees through described selectivity breathable films by the ammonia with alkali reaction generation, enter after described amino molecule indicator, can cause described amino molecule indicator generation chromogenic reaction; Described photoelectric sensor produces light signal, and the variation of the transmitted intensity causing according to the change color of described amino molecule indicator, produces corresponding electric signal; Described controller is for regulating the power of light signal, and the described electric signal producing is carried out to filter and amplification, by the electric signal transmission after filter and amplification to processor, so that described processor obtains the concentration of ammonia nitrogen in water sample; Described electrode cap arranges the other end of described external electrode housing, for described photoelectric sensor being sealed in to described external electrode enclosure interior.By this novel ammonia gas-sensing electrode, can effectively detect the ammonia-nitrogen content in water sample.
In addition, with respect to electrochemical sensor, the applied photoelectric sensor of the application has stronger stability, and longer serviceable life, has improved the quality of ammonia gas-sensing electrode.And described photoelectric sensor is when detecting, measurement range internal linear correlativity is better, is conducive to processor and obtains more accurate measurement result.
Because the chromogenic reaction of amino molecule and amino molecule indicator is reversible reaction, when amino molecule content in water sample is less, amino molecule can enter in water sample by selectivity breathable films.According to this principle, can clean ammonia gas-sensing electrode disclosed by the invention, when cleaning, described ammonia gas-sensing electrode is positioned in the solution that amino molecule concentration is lower, and the amino molecule in electrode can enter in solution, completes cleaning.
Further, the structural representation of photoelectric sensor shown in Figure 2, described photoelectric sensor 3 comprises: photoelectric sensor housing 31, light source 32 and photoelectric detector 33.
Wherein, described light source 32 is arranged on one end of described photoelectric sensor housing 31, for generation of light signal.
Described photoelectric detector 33 is arranged on the other end of described photoelectric sensor housing 31, when the color of described amino molecule indicator changes, described photoelectric detector 33 is for experiencing the Strength Changes of described optical signal transmissive, and change and produce corresponding electric signal according to described transmitted intensity, so that processor is after receiving described electric signal, according to described electric signal, calculate absorbance after the colour developing of described amino molecule indicator, thereby obtain the ammonia nitrogen concentration in water sample.
Structural representation shown in Figure 2, described photoelectric sensor housing 31 is the right cylinder that a centre has semicircle breach, the cylindrical vacant amino molecule indicator that has been partially filled, the two ends of described light source 32 and 33 decibels of settings of photoelectric detector and described breach.
Described light source 32 is with LED(Light Emitting Diode, light emitting diode) form realize, or, adopt secondary color light source and the monochromator that is arranged on outside described secondary color light source is realized.Described photoelectric detector 33 is generally silicon photo diode, light signal can be converted into corresponding electric signal.Certainly, described light source 32 and photoelectric detector 33 also can other forms be realized, and this programme does not limit this.
In addition, in described photoelectric sensor 3, also comprise seal member, referring to Fig. 2, described seal member comprises: butt-end packing lid 34, butt-end packing pad 35, light source isolation pad 36, sealing minipad 37, O shape circle 38, photosensitive isolation pad 39, for the amino molecule indicator of avoiding described photoelectric sensor 3 to fill, flow out, and water sample flows into.In addition, also comprise the transparent glass sheet 30 that covers described photoelectric detector 33.
Further, described controller 4 comprises light source controller 41 and photo controller 42, and wherein, described light source controller 41 is connected with described light source 32, for regulating information according to the light source receiving, regulates the intensity of the light signal of described light source generation; Described photoelectric detector 33 is connected with described photo controller 42, and described photo controller 42 filters for the electric signal that described photoelectric detector 33 is produced and amplifies processing, and by the electric signal transmission after processing to described processor.
Described light source controller 41 comprises: DAC(digital-to-analogue converte, digital-analog convertor) regulator, by the operation to described DAC regulator, can regulate the electric current of described DAC regulator output, and then control the intensity of the light signal that described light source 32 sends.In the time need to regulating the intensity of light signal, staff can directly regulate described light source controller 31, also can operate processor, so that described processor produces adjusting information, and is sent to described light source controller 31, realizes the adjusting of light signal.
Described photo controller 42 comprises: operational amplifier and wave filter, described operational amplifier amplifies processing for the described electric signal that described photoelectric detector 33 is produced, described wave filter is connected with described operational amplifier, for the electric signal to after amplifying, carry out filtering processing, thereby realize the processing of the electric signal that described photoelectric detector 33 is produced.In addition, when needs are processed electric signal, staff can directly operate described photo controller 42, also can operate by described processor, by described processor, produce corresponding adjusting information and transfer to described photo controller, realizing the adjusting of reading described photo controller.
In addition, the annexation of described controller 4 and photoelectric sensor 3 can implemented in many forms, and described controller 4 is arranged on the inside of described photoelectric sensor 3, or described controller 4 is arranged on the outside of described external electrode housing 1.
For example, photoelectric sensor 3 shown in Figure 3 and the annexation schematic diagram of controller 4, described controller is arranged on the outside of described external electrode housing 1, by wire, realize and being connected of described photoelectric sensor 3, wherein, described light source controller 41 is connected with described light source 32, and described photo controller 42 is connected with described photoelectric detector 33, and described controller 4 is connected with processor.In this case, when water sample is detected, conventionally external electrode housing 1 part of ammonia gas-sensing electrode is placed in water sample to be detected, controller is placed on outside water sample.In described photoelectric sensor 3, be filled with amino molecule indicator 6.
In addition, photoelectric sensor 3 shown in Figure 4 and the annexation schematic diagram of controller 4, described controller 4 is arranged on the inside of described photoelectric sensor 3, wherein, described light source controller 41 is connected with described light source 32, and described photo controller 42 is connected with described photoelectric detector 33.In described photoelectric sensor 3, be filled with amino molecule indicator 6.
This programme discloses a kind of novel ammonia gas-sensing electrode, described ammonia gas-sensing electrode comprises external electrode housing, electrode film cap, photoelectric sensor, amino molecule indicator, controller and electrode cap, wherein, described electrode film cap is arranged on one end of described external electrode housing, and is provided with the selectivity breathable films that allows ammonia to pass through.The ammonia producing when water sample to be detected and alkali reaction sees through described selectivity breathable films and enters after described amino molecule indicator, can cause the generation chromogenic reaction of described amino molecule indicator; Described photoelectric sensor produces light signal, and the variation of the transmitted intensity causing according to the change color of described amino molecule indicator, produces corresponding electric signal; Described controller is for regulating the power of light signal, and the described electric signal producing is carried out to filter and amplification, by the electric signal transmission after filter and amplification to processor, so that described processor obtains the concentration of ammonia nitrogen in water sample according to described electric signal; Described electrode cap is arranged on the other end of described external electrode housing, for described photoelectric sensor being sealed in to described external electrode enclosure interior.By this ammonia gas-sensing electrode, can effectively detect the ammonia-nitrogen content in water sample.
In addition, with respect to electrochemical sensor, the applied photoelectric sensor of the application has stronger stability, and longer serviceable life, has improved the quality of ammonia gas-sensing electrode, is conducive to reduce the cost of the detection of ammonia nitrogen in water sample.And described photoelectric sensor is when detecting, measurement range internal linear correlativity is better, is conducive to processor and obtains more accurate measurement result, and test result accurately and reliably.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a novel ammonia gas-sensing electrode, is characterized in that, comprising:
External electrode housing;
Be arranged on the electrode film cap of described external electrode housing one end, described electrode film cap is provided with the selectivity breathable films that allows ammonia to pass through;
Be arranged on the photoelectric sensor of described external electrode enclosure interior, and the inner amino molecule indicator of filling of described photoelectric sensor, described photoelectric sensor produces light signal, to form transmitted light, and when seeing through described selectivity breathable films, ammonia entering described amino molecule indicator, cause described amino molecule indicator generation chromogenic reaction, described photoelectric sensor is according to before and after chromogenic reaction, and the variation of optical signal transmissive power produces corresponding electric signal;
Be connected with described photoelectric sensor, control the power of the light signal of described photoelectric sensor generation, described electric signal is carried out to filter and amplification, and by the electric signal transmission after described filter and amplification the controller to processor, described processor is after receiving described electric signal, according to absorbance after the colour developing of described electric signal calculating amino molecule indicator, to obtain corresponding ammonia nitrogen concentration;
Be arranged on the other end of described external electrode housing, described photoelectric sensor be sealed in to the electrode cap of described external electrode enclosure interior.
2. ammonia gas-sensing electrode according to claim 1, is characterized in that, described photoelectric sensor comprises:
Photoelectric sensor housing;
Be arranged on described photoelectric sensor housing one end, produce the light source of light signal;
Be arranged on the described photoelectric sensor housing other end, when the color of described amino molecule indicator changes, the power of experiencing described optical signal transmissive changes, and according to the variation of described transmitted light, produces the photoelectric detector of corresponding electric signal.
3. ammonia gas-sensing electrode according to claim 2, is characterized in that, described controller comprises:
Be connected with described light source, according to the light intensity regulating information receiving, regulate the light source controller of described light signal strength;
Be connected with described photoelectric detector, the electric signal that described photoelectric detector is produced filters and amplifies processing, and by the electric signal transmission after processing the photo controller to described processor.
4. ammonia gas-sensing electrode according to claim 3, is characterized in that, described light source controller comprises:
DAC regulator.
5. ammonia gas-sensing electrode according to claim 3, is characterized in that, described photo controller comprises:
The described electric signal that described photoelectric detector is produced amplifies the operational amplifier of processing;
Be connected with described operational amplifier, the wave filter that the electric signal after amplifying is carried out to filtering processing.
6. ammonia gas-sensing electrode according to claim 1, is characterized in that, described controller is arranged on described photoelectric sensor inside or is arranged on the outside of described external electrode housing.
7. ammonia gas-sensing electrode according to claim 2, is characterized in that, described light source is:
Secondary color light source and be arranged on the monochromator outside described secondary color light source, or LED.
8. ammonia gas-sensing electrode according to claim 2, is characterized in that, described photoelectric detector is:
Silicon photo diode.
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Cited By (1)
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| CN104535506A (en) * | 2015-01-30 | 2015-04-22 | 四川清和科技有限公司 | Drainage basin ammonia-nitrogen concentration detection method |
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