CN101923055A - Portable functional color comparator - Google Patents
Portable functional color comparator Download PDFInfo
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- CN101923055A CN101923055A CN 201010226263 CN201010226263A CN101923055A CN 101923055 A CN101923055 A CN 101923055A CN 201010226263 CN201010226263 CN 201010226263 CN 201010226263 A CN201010226263 A CN 201010226263A CN 101923055 A CN101923055 A CN 101923055A
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- color comparator
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Abstract
The invention provides a portable functional color comparator comprising a sample bath, a plurality of measuring elements, a measuring element and an electronic system with a microprocessor, wherein the sample bath is used for containing liquid to be measured; the plurality of measuring elements are used for measuring the physical parameter and the electrochemical parameter of the liquid to be measured; the measuring element is used for colorimetric analysis; and the electronic system is used for reading the information of each measuring element, carrying out parameter analysis on a plurality of parameter values and simultaneously measuring a plurality of water-quality parameters and the concentration of one substance, thereby the measuring precision is improved.
Description
Technical field
The present invention relates to field of measuring technique, particularly a kind of portable functional color comparator.
Background technology
At the Treatment of Industrial Water scene, there are many parameters relevant to need to detect with water quality, some is a physical parameter, leads temperature as electricity; Some is the concentration of chemistry or biological substance, as total phosphorus, and pH and calcium ion concentration.Portablely provide the surveying instrument of power supply widely-used by battery.These surveying instruments comprise that being used to measure electricity leads, pH, and the instrument of oxidation-reduction potential also is useful on the colorimetric analysis instrument of measuring the chemical/biological chemical substance concentration.Though the use of these portable instruments is compared time and the operation easier that has reduced water analysis widely with sample presentation to the laboratory, need to use a plurality of instruments in measuring process, sample is divided into many parts measures and obtain series of parameters.
In the color comparator of conventional portable, generally only measure the absorbance of a wavelength, limited the range of application of color comparator like this, some analytical approach need be measured the absorbance of two wavelength, calculates the concentration of detection by its difference or ratio.Sometimes need to carry out temperature compensation.When for example utilizing the dye of positive ion to survey the concentration of multipolymer, temperature has very big influence to absorbance, and the effect of the multipolymer and the dye of positive ion makes dyestuff change color.If measure the absorbance of two wavelength, measuring accuracy can increase greatly.Same example also is applicable to the pH indicator measures pH, can determine the pH value more accurately with the pH indicator than single absorbance in the difference and the temperature of the absorbance of sour attitude and alkali attitude.
As shown in Figure 1, in existing colorimetric analysis instrument, cuvette 6 separates with color comparator.Cuvette 6 is normally rectangular, also can be a glass reagent bottle, and fluid sample is positioned in the cuvette 6.In cuvette 6, add chemical reagent, again cuvette 6 is placed the sample cell 1 of color comparator, by the absorbance that the photodiode 2 and the light emitting diode 3 of color comparator are measured liquid in the cuvette 6, the light path of the physical dimension of cuvette 6 rather than the 1 decision colorimetric analysis of the sample cell of color comparator.In addition, because the sensor of measure physical parameters generally will directly contact with water, and up to the present, does not also have a color comparator that the sample cell of colorimetric analysis and the sample cell of physical measurement are combined, therefore, existing color comparator can not carry out the measurement of chemical parameters and physical parameter simultaneously.If the colorimetric analysis result needs physical parameter to carry out timing, the user need use the sensor device of a measure physical parameters and the concentration that color comparator carries out measuring for twice physical parameter and a chemical substance, with the physical parameter that obtains the concentration of the chemical substance that obtains from color comparator is proofreaied and correct, such correction generally needs the user to use another utility appliance to finish, according to the complexity of proofreading and correct, utility appliance may be a computing machine, counter, or computation sheet.
Summary of the invention
The objective of the invention is to propose a kind of multi-functional colorimetric analysis instrument, can detect a plurality of parameters simultaneously, thereby minimizing improves analysis precision to the analysis time of series of parameters.
A kind of portable functional color comparator comprises:
One sample cell is used to hold fluid to be measured;
A plurality ofly be used to measure the physical parameter of fluid to be measured and the measuring sensor of electrochemical parameter;
The measuring sensor that is used for colorimetric analysis; And
The electronic system that has microprocessor, described electronic system reads the information of described each measuring sensor, and multiple parameter values are carried out multi parameter analysis, measures the concentration of a plurality of water quality parameters and a material simultaneously.
Preferably, the physical parameter of described a plurality of measurement fluids to be measured and the measuring sensor of electrochemical parameter are sealed in the inwall of described sample cell, with the direct contact measurement of fluid to be measured.
Wherein, the pond body of described sample cell is to see through glass or the plastic material of 250 nanometers to 1000 nanometer light.
Wherein, the described measuring sensor that is used for colorimetric analysis is light emitting diode and photodiode.
Wherein, the element of described measurement electrochemical parameter is a metal electrode, is used to measure conductance of liquid.
Wherein, the element of described measurement electrochemical parameter is the electrode pair of iridium oxide electrode/silver-silver chloride electrode composition or the electrode pair that glass electrode/silver-silver chloride electrode is formed, and is used to measure liquid pH value.
Wherein, the element of described measure physical parameters is a temperature sensor.
Wherein, the maximum emission wavelength of described light emitting diode is between 250 to 1200 nanometers.
Wherein, described metal electrode is platinum electrode, gold electrode, stainless steel electrode or graphite electrode.
The method of the concentration of a plurality of water quality parameters and a material is measured in a kind of use as above portable functional color comparator simultaneously, comprises the steps:
A. sample is injected sample cell, measure a plurality of parameters, whether needs give processing according to one or more parameter value judgement samples;
B. do not need to give processing as sample, portable functional color comparator prompting user adds chemical reagent in sample, measures the absorbance of one or more wavelength in a preset time, and described Measuring Time is obtained by one or more parameter value calculation;
C. calculate the concentration of detected chemical substance according to the absorbance of at least one parameter and at least one wavelength.
Use multi-functional colorimetric analysis instrument of the present invention, can detect a plurality of parameters simultaneously, measure the concentration of a plurality of water quality parameters and a material simultaneously, thereby improve measuring accuracy.
Description of drawings
Figure 1 shows that the structural representation of existing portable color comparator;
Figure 2 shows that the structural representation of portable color comparator one preferred embodiment of the present invention;
Figure 3 shows that the structural representation of portable another preferred embodiment of color comparator of the present invention;
Figure 4 shows that the portable color comparator measuring method of the present invention process flow diagram.
Embodiment
Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing.
As shown in Figure 2, in the both sides of the sample cell 1 of color comparator photoelectric diode 2 and light emitting diode 3 are installed, light emitting diode 3 provides the monochromatic light of maximum emission wavelength between 250 to 1200 nanometers.Sample cell is to see through glass or the plastic material of 200 nanometers to 1000 nanometer light.Also has optical filter 5 before photoelectric diode 2 and the light emitting diode 3.A plurality of rod dress metal electrodes 4 also are installed in the sample cell 1 of color comparator, are used to measure conductance of liquid.Metal electrode 4 also can be a sheet metal, and the surface of sheet metal is concordant with the sample cell inwall, so that can additionally insert a traditional glass cuvette when needed.Metal electrode 4 is platinum electrode, gold electrode, stainless steel electrode or graphite electrode.Any those skilled in the art of being familiar with can expect the shape of metal electrode easily and be installed in the various variations of the position of sample cell.
As shown in Figure 3, a plurality of elements 6 that are used to measure electrochemical parameter also are installed in the sample cell 1 of color comparator, the element 6 of measuring electrochemical parameter is the electrode pair of iridium oxide electrode/silver-silver chloride electrode composition or the electrode pair that glass electrode/silver-silver chloride electrode is formed, and is used to measure liquid pH value.In order to allow the electrolyte of silver/silver chloride contrast electrode and the porous electric bridge can be so that change, contrast electrode can be installed in the bottom of sample cell as shown in Figure 3, and like this, contrast electrode can be changed from the back of color comparator.Design like this, even contrast electrode and sample cell can not be accomplished security seal, water also can not be seeped in the electronic system of color comparator.
The physical parameter of above-mentioned a plurality of measurement fluids to be measured and the measuring sensor of electrochemical parameter are sealed in the inwall of described sample cell, with the direct contact measurement of fluid to be measured.
Clearly, also other measuring sensor can be installed on the wall of sample cell, as long as the measuring sensor size is enough little, and the sealing of available fluid sealant.The example temperature-sensing element.In many measurements, temperature is a very important parameters, and other measurement needs temperature correction.
Multi-functional colorimetric sample cell of the present invention can be once injection molded with pond body and metal electrode with the method for injection moulding, can accomplish the sealing between metal electrode and pond body like this, sample cell of the present invention also can be reserved the duct of installing electrodes when injection moulding, so that with fluid sealant electrode and pond body are sealed.
Simultaneously, multi-functional colorimetric sample cell of the present invention also has the electronic system (not shown) of microprocessor, described electronic system reads the information of described each measuring sensor, and multiple parameter values are carried out multi parameter analysis, measures the concentration of a plurality of water quality parameters and a material simultaneously.
As shown in Figure 4, the portable color comparator measuring method of the present invention process flow diagram is the example explanation not available new function of traditional color comparator that the present invention was possessed to measure pH and absorbance simultaneously.Shown in process flow diagram, the operator at first adds water sample in sample cell, color comparator measuring samples pH, if the sample pH value value not in the scope that the colorimetric analysis method requires, the indication of colorimetric analysis instrument the operator regulate sample pH value.This seemingly very simple function, even use a pH instrument and a traditional color comparator can not realize this function, this is because the operator must know the pH scope of colorimetric analysis method.And when using color comparator of the present invention, the pH scope of a certain colorimetric analysis method can preestablish and be stored in the color comparator.Shown in process flow diagram, after adding analytical reagent, color comparator is measured the pH of sample-reagent reacting system, this pH is different from the pH before adding reagent, the pH of its response sample-reagent reacting system, if this pH value is not in the optimization scope of this colorimetric analysis method, the result of colorimetric analysis can be proofreaied and correct with the pH value of measuring.
Survey nitrite concentration:
When measuring nitrite concentration with the azo method, the measurement reaction time is relevant with sample temperature, if the water sample temperature more than 25 degree, is measured reaction and can be finished in 15 minutes.When using the multi-functional colorimetric analysis instrument of the present invention, water sample is added in the sample cell, measuring samples temperature and absorbance made zero, operating personnel add azo reagent in water sample, if sample temperature is more than 25 degree, the colorimetric analysis instrument reads absorbance in 15 minutes the time, follows according to absorbance and calculates nitrite concentration.If sample temperature is between 18 to 25 degree, the colorimetric analysis instrument reads absorbance in 20 minutes the time, follows according to absorbance and calculates nitrite concentration.If sample temperature is below 18 degree, the colorimetric analysis instrument is reminded operating personnel, and sample temperature is too low, need be heated to sample near 25 degree.Present method needs operating personnel to use another temperature measuring equipment to come the measuring samples temperature, can not more can not allow color comparator serviceability temperature information come the contrast colors analysis to do certain judgement and analysis with regard to the measuring samples temperature when carrying out colorimetric analysis.
Increase with the method for measuring the multi-wavelength absorbance and can survey concentration range:
When 820 nanometers use the 22mm sample cell to survey positive phosphorus, can survey positive phosphorus concentration with molybdenum blue method in 3ppm.By the visible spectrum of molybdenum blue as can be known, molybdenum blue approximately is it in half of 820nm in the absorbance of 650nm, in color comparator of the present invention, if the absorbance of 820nm is greater than a predetermined lower bound, color comparator of the present invention can be measured the 650nm absorbance automatically, calculates positive phosphorus concentration with the 650nm absorbance.
Measure the concentration of anionic polymer with the method for measuring multi-wavelength absorbance multiparameter:
The dye of positive ion can be used for measuring the anionic polymerisation substrate concentration, and the method has following characteristics: the effect product of the dye of positive ion and anionic polymer is the function of temperature in the absorbance of certain wavelength; If the electricity of water sample is led very high, the spectrum of the effect product of the dye of positive ion and anionic polymer can change a lot.When measuring the anionic polymerisation substrate concentration with color comparator of the present invention, the electricity of first measuring samples is led, and is higher than a certain preset value as electric conductivity value, and the colorimetric analysis instrument reminds operating personnel to dilute sample.As electric conductivity value in a certain preset range, the colorimetric analysis instrument reminds operating personnel to add chemical reagent, when certain hour, measure the temperature of solution in the absorbance of one or two wavelength and the sample cell, follow according to predefined correction equation with survey absorbance and temperature value and calculate the anionic polymerisation substrate concentration.
Described in this instructions is several preferred embodiment of the present invention, and above embodiment is only in order to illustrate technical scheme of the present invention but not limitation of the present invention.All those skilled in the art all should be within the scope of the present invention under this invention's idea by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. portable functional color comparator is characterized in that comprising:
One sample cell is used to hold fluid to be measured;
A plurality ofly be used to measure the physical parameter of fluid to be measured and the measuring sensor of electrochemical parameter;
The measuring sensor that is used for colorimetric analysis; And
The electronic system that has microprocessor, described electronic system reads the information of described each measuring sensor, and multiple parameter values are carried out multi parameter analysis, measures the concentration of a plurality of water quality parameters and a material simultaneously.
2. portable functional color comparator as claimed in claim 1 is characterized in that the physical parameter of described a plurality of measurement fluids to be measured and the measuring sensor of electrochemical parameter are sealed in the inwall of described sample cell, with the direct contact measurement of fluid to be measured.
3. portable functional color comparator as claimed in claim 1 is characterized in that described sample cell is to see through glass or the plastic material of 250 nanometers to 1000 nanometer light.
4. portable functional color comparator as claimed in claim 1 is characterized in that the described measuring sensor that is used for colorimetric analysis is light emitting diode and photodiode.
5. portable functional color comparator as claimed in claim 1, the element that it is characterized in that described measurement electrochemical parameter is a metal electrode, is used to measure conductance of liquid.
6. portable functional color comparator as claimed in claim 1, the element that it is characterized in that described measurement electrochemical parameter is the electrode pair of iridium oxide electrode/silver-silver chloride electrode composition or the electrode pair that glass electrode/silver-silver chloride electrode is formed, and is used to measure liquid pH value.
7. portable functional color comparator as claimed in claim 1, the element that it is characterized in that described measure physical parameters is a temperature sensor.
8. portable functional color comparator as claimed in claim 4, the maximum emission wavelength that it is characterized in that described light emitting diode is between 200 to 1200 nanometers.
9. portable functional color comparator as claimed in claim 5 is characterized in that described metal electrode is platinum electrode, gold electrode, stainless steel electrode or graphite electrode.
10. the described portable functional color comparator of one of a use such as claim 1-9 is measured the method for the concentration of a plurality of water quality parameters and a material simultaneously, it is characterized in that comprising the steps:
A. sample is injected sample cell, measure a plurality of parameters, whether needs give processing according to one or more parameter value judgement samples;
B. do not need to give processing as sample, portable functional color comparator prompting user adds chemical reagent in sample, measures the absorbance of one or more wavelength in a preset time, and described Measuring Time is obtained by one or more parameter value calculation;
C. calculate the concentration of detected chemical substance according to the absorbance of at least one parameter and at least one wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010226263 CN101923055A (en) | 2010-07-04 | 2010-07-04 | Portable functional color comparator |
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| CN 201010226263 CN101923055A (en) | 2010-07-04 | 2010-07-04 | Portable functional color comparator |
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| CN101923055A true CN101923055A (en) | 2010-12-22 |
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Cited By (2)
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| CN108957345A (en) * | 2018-08-02 | 2018-12-07 | 东北大学 | Information about power acquisition device, method and the detection method of quantity of electricity of all-vanadium liquid flow energy storage system |
| CN110243994A (en) * | 2019-07-15 | 2019-09-17 | 王飞 | A kind of spectrum-current potential-temperature multidimensional titration instrument and its application method |
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| CN110243994A (en) * | 2019-07-15 | 2019-09-17 | 王飞 | A kind of spectrum-current potential-temperature multidimensional titration instrument and its application method |
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Application publication date: 20101222 |