CN106770516A - The measuring method and its measuring system of nitrate ion content in a kind of biological product - Google Patents
The measuring method and its measuring system of nitrate ion content in a kind of biological product Download PDFInfo
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- CN106770516A CN106770516A CN201611143027.1A CN201611143027A CN106770516A CN 106770516 A CN106770516 A CN 106770516A CN 201611143027 A CN201611143027 A CN 201611143027A CN 106770516 A CN106770516 A CN 106770516A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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Abstract
The invention discloses a kind of measuring method of nitrate ion content in biological product, its principle is：Sinusoidal current flows to electrochemical cell, spot frequency scope 0.1Hz to 100KHz.Therefore, traction electric field is formed, causes the ionic polarization of electrochemical cell.Then, electric current is begun to flow through in an electrochemical cell, and the electric current is limited by the impedance of this battery.Because battery has reactive component impedance, relative to the signal of input electrochemical cell, the signal determined from electrochemical cell is subjected to displacement.Then, the phase shift between we have signal.So as to calculate nitrate concentration using open.Present invention advantage compared with prior art is：The present invention can improve 23 times with the certainty of measurement of middle nitrate ion concentration in biological product.
Description
Technical field
The present invention relates to nitrate ion in the measurement of nitrate ion in biological product, more particularly to a kind of biological product
The measuring method and its measuring system of content.
Background technology
Conventional method is relatively low to the certainty of measurement of nitrate ion content in biological product,
The content of the invention
The present invention is to solve above-mentioned deficiency, there is provided the measuring method of nitrate ion content in a kind of biological product
And its measuring system.
Above-mentioned purpose of the invention is realized by following technical scheme：Nitrate ion content in a kind of biological product
Measuring method, comprise the following steps：
(1) phase difference and system resistance are determined：The AC signal Г of frequency generator is delivered to electricity by total amplifier В 3
Chemical unit and the project (sample) studied；By the alternating current of institute's study sample, according to connection measuring resistance RStandard, produce
The different potential alternating current of life；The amplifier B1 and B2 of high input impedance can increase relevant voltage and the electric current letter of sample
Number, one of these signals are delivered to the second output entrance of amplifier, for setting up feedback signal；Electric current and voltage AC signal
Digital simulation frequency converter is delivered to, and is processed, to determine phase difference and system resistance；
Under the various concentration conditions of research ion, determine phase difference and set up calibration curve.
Then in listing institute's research project in electrochemical cell, and the phase difference between electromotive force and electric current is determined.
(2) identified project according to calibration curve the content of intermediate ion：
Identified project ions content according to below equation：
Y=x1+x2S+x3S2, (1)
Wherein, S- phase differences；
x1, x2, x3- multiple related control coefrficients；
Specific practice is：
The average sample of selection institute research project simultaneously selects instrument；Then, institute's research project is put into electrochemical cell；
Then performed a scan in 0.1 hertz to 100 kilohertz ranges, determine phase difference, according to calibration curve, phase difference value with
Ion concentration is relative to each other.
The measuring system of nitrate ion content in a kind of biological product, including processor, the processor are connected with electricity
Source manager, touch pad, display, control button, servicing lighting, diode indicator, bluetooth equipment, measuring apparatus and
Radiation measurement devices；
The power supervisor connects power supply；
The measuring apparatus include frequency generator, output buffer, input amplifier, digital simulation frequency converter one, number
Word analog inverter two and detector, frequency generator connection output buffer, output buffer connection digital simulation frequency converter
Two and detector, detector connection input amplifier, input amplifier connection digital simulation frequency converter one；
The radiation measurement devices include radiation sensor power supply, radiation sensor and match circuit, radiation sensor electricity
Source, radiation sensor and match circuit are sequentially connected.
Present invention advantage compared with prior art is：The present invention can be with middle nitrate ion concentration in biological product
Certainty of measurement improves 2-3 times.
Brief description of the drawings
Fig. 1 is the structural representation of measuring unit in the present invention.
Fig. 2 is present invention determine that the apparatus structure schematic diagram of the phase difference between electromotive force and electric current.
Phase difference and the calibration graph set up are determined in Fig. 3-Fig. 6 inventions.
Fig. 7 is the structural representation of the measuring system of nitrate ion content in the present invention.
Specific embodiment
The present invention is described in further detail with reference to embodiment.
The measuring method of nitrate ion content in a kind of biological product of the invention, its principle is：Sinusoidal current is flowed to
Electrochemical cell, spot frequency scope 0.1Hz to 100KHz.Therefore, traction electric field is formed, causes the ion pole of electrochemical cell
Change.Then, electric current is begun to flow through in an electrochemical cell, and the electric current is limited by the impedance of this battery.Because battery has nothing
Work(component impedance, so relative to the signal of input electrochemical cell, the signal determined from electrochemical cell is subjected to displacement.In
It is that we have the phase shift between signal, and nitrate concentration is calculated using formula.
In view of there is the factor of reactive component in electrochemistry ring, the function of ion polarization to measuring electrode surface is related,
Electric current passes through to produce the phase difference between electromotive force and electric current during electrochemical cell, sees Fig. 1.The parameter be used to formulate in solution
And in moist product in the new way of determination ion concentration.
We specify simultaneously：Determine the optimum current frequency of phase difference in the range of 0.1 hertz to 100 KHzs.
In order to further increase frequency, phase difference is configured to zero, need not thus consider the content of frequency values and ion.
The lower limit of measurement is determined using two factors.First：Technical factor, i.e.,：Limitation according to frequency generator is true
Fixed specific frequency；Second：Electrolysis is acted on and the interior possibility for producing of polarization low-frequency range, because in low-frequency range
Interior no phase difference.
The measuring method of nitrate ion content, comprises the following steps in a kind of biological product of the invention：
(1) phase difference and system resistance are determined：The AC signal Г of frequency generator is delivered to electricity by total amplifier В 3
Chemical unit and the project (sample) studied；By the alternating current of institute's study sample, according to connection measuring resistance RStandard, produce
The different potential alternating current of life；The amplifier B1 and B2 of high input impedance can increase relevant voltage and the electric current letter of sample
Number, one of these signals are delivered to the second output entrance of amplifier, for setting up feedback signal；Electric current and voltage AC signal
Digital simulation frequency converter is delivered to, and is processed, to determine phase difference and system resistance；
Under the various concentration conditions of research ion, determine phase difference and set up calibration curve, as shown in Figures 3 to 6.
Then in listing institute's research project in electrochemical cell, and the phase difference between electromotive force and electric current is determined.
(2) identified project according to calibration curve the content of intermediate ion：
Identified project ions content according to below equation：
Y=x1+x2S+x3S2, (1)
Wherein, S- phase differences；
x1, x2, x3- multiple related control coefrficients；
Specific practice is：
The average sample of selection institute research project simultaneously selects instrument, and the structure of instrument meets the schematic diagram shown in Fig. 2；So
Afterwards, institute's research project is put into electrochemical cell；Then performed a scan in 0.1 hertz to 100 kilohertz ranges, really
Phase bit is poor, and according to calibration curve, phase difference value is relative to each other with ion concentration.
Compared with known method, the method that the present invention is provided is easier to phase difference as measurement parameter, at 10 hertz
Measured in the range of to 100 KHzs, be 10 KHzs to 105 KHzs for the measurement range of sample.With sample
Difference is the characteristics of method that we provide has certainty of measurement high.
Example：Pumpkin, onion, winter muskmelon are have selected, used as goal in research, selection nitrate ion is used as determination for cucumber
Ion.When the frequency current for passing through is 0.1 hertz to 10 hertz, it is determined by electrochemical cell.According to formula (1) really
Determine the content of Nitrate Content in Food ion.
The results are shown in Table 1.
When being compared to the data that spectrometer is obtained, 1% is no more than using the error of measuring method of the present invention, using this
During equipment, can conclude：Measuring method of the present invention is taken to determine that nitrate ion is accurately and reliably.And, with regulation
The difference of method is：The time for being ready for 1 analysis using spectrometer is about 30 minutes, and is entered using measuring method of the present invention
Row analysis is quick, and the time that completing analysis needs is no more than 3 seconds.
Table 1
As shown in fig. 7, in order to realize the method, it is proposed that the equipment using possessing radioassay function, the present invention provides one
The measuring system of nitrate ion content in biological product, including processor 3 are planted, the processor 3 is connected with power supervisor
2nd, touch pad 4, display 5, control button 6, servicing lighting 7, diode indicator 8, bluetooth equipment 9, measuring apparatus 10
With radiation measurement devices 11；
The power supervisor 2 connects power supply 1；The power supply 1 is battery；
The measuring apparatus 10 include frequency generator 10-1, output buffer 10-2, input amplifier 10-3, digital mould
Intend the 10-4 of frequency converter one, the 10-5 of digital simulation frequency converter two and detector 10-6, frequency generator 10-1 connection output buffers
10-2, output buffer 10-2 connection digital simulation frequency converter two 10-5 and detector 10-6, detector 10-6 connection input is put
The big 10-4 of device 10-3, input amplifier 10-3 connection digital simulation frequency converter one；
The radiation measurement devices 11 include radiation sensor power supply 11-3, radiation sensor 11-2 and match circuit 11-
1, radiation sensor power supply 11-3, radiation sensor 11-2 and match circuit 11-1 are sequentially connected.
The power supervisor 2 is used to control the charging and discharging of power supply (battery)；Processor 3 is used to control entirely to set
Standby work operation；Display 5 is used for the information of output services present situation and measurement result；Control button 6 is used to perform equipment fortune
Row control function；Measuring apparatus 10 are used to measure the nitrate ion in sample 12；Radiation measurement devices 11 are used to measure radiation
Environment.The present invention can quickly measure the parameters of electric power of studied medium, and the information to obtaining makes convenient conclusion.
Computing device following functions：The charge volume of its built-in digital simulation frequency converter measurement battery using treatment, really
Determine the whole circuit of the pressing of control button and touch pad, unlatching and pass hull closure power supply, control servicing lighting, control is blue
Tooth equipment, over the display output information, measuring equipment and radiological survey instrument.
Power supervisor provides the supply of electric power of stabilization to equipment.
Equipment is connected and closed by control button, and controls to start measurement.
Diode indicator and display can export information (phone, flat board that external device status is connected on equipment
Instrument etc.), study the measuring state of product, the adjustment of the data, equipment of radiation environment.
The measuring instrument of control process device includes output buffer, and high-frequency signal is delivered into dress by the output buffer
There are the detector and digital simulation frequency converter of program input amplifier, the reading of detector can be deleted, improve certainty of measurement, and
The loss of measurement signal is not resulted in.
The method according to the invention, measuring apparatus of the invention are operated in the following ways：Test specimen is not visited
When surveying device, the correction of system is measured first, when once being opened, can improve the precision and speed of measurement.In exception
In the case of, it is necessary to the interference result of measuring system idle running circuit.Need to transmit sinusoidal signal to detector for this.Herein
In the case of, detector should not be pierced into studied product.Using digital simulation frequency converter one and digital simulation frequency converter two,
Can measure the level of idle running circuit, and charge to the memory of processor.Be put into detector in test specimen by suggestion.Into
Phase difference value between digital simulation frequency converter one and two kinds of signals of digital simulation frequency converter two is converted to the measurement of nitrate
Value, laboratory reading value and impurity content Value Data (salt, including nitrate) with product quality are compared.According to right
Result is compared, and the quality to product is estimated.Meanwhile, by the bluetooth equipment of external equipment, available two kinds
Phase difference value between signal, exports on display after being processed.
After equipment is connected, start radiation measurement devices.According to the number of pulses that radiation sensor is calculated, put to existing
Penetrate environment to be calculated, accumulated value is calculated at the appointed time using timer.The data value output that will be obtained arrives aobvious
Show on device, external equipment is passed data to by bluetooth equipment.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and embodiment content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (2)
1. in a kind of biological product nitrate ion content measuring method, comprise the following steps：
(1) phase difference and system resistance are determined：The AC signal Г of frequency generator is delivered to electrochemistry by total amplifier В 3
Unit and the project (sample) studied；By the alternating current of institute's study sample, according to connection measuring resistance RStandard, produce not
Same potential alternating current；The amplifier B1 and B2 of high input impedance can increase the relevant voltage and current signal of sample, this
One of a little signals are delivered to the second output entrance of amplifier, for setting up feedback signal；Electric current and voltage AC signal are transmitted
To digital simulation frequency converter, and processed, to determine phase difference and system resistance；
Under the various concentration conditions of research ion, determine phase difference and set up calibration curve；
Then in listing institute's research project in electrochemical cell, and the phase difference between electromotive force and electric current is determined.
(2) identified project according to calibration curve the content of intermediate ion：
Identified project ions content according to below equation：
Y=x1+x2S+x3S2, (1)
Wherein, S- phase differences；
x1, x2, x3- multiple related control coefrficients；
Specific practice is：
Institute's research project is put into electrochemical cell；Then performed a scan in 0.1 hertz to 100 kilohertz ranges,
Determine phase difference, according to calibration curve, phase difference value is relative to each other with ion concentration.
2. in a kind of biological product nitrate ion content measuring system, it is characterised in that：Including processor, the processor
It is connected with power supervisor, touch pad, display, control button, servicing lighting, diode indicator, bluetooth equipment, survey
Amount equipment and radiation measurement devices；
The power supervisor connects power supply；
The measuring apparatus include frequency generator, output buffer, input amplifier, digital simulation frequency converter one, digital mould
Intend frequency converter two and detector, frequency generator connection output buffer, the He of output buffer connection digital simulation frequency converter two
Detector, detector connection input amplifier, input amplifier connection digital simulation frequency converter one；
The radiation measurement devices include radiation sensor power supply, radiation sensor and match circuit, radiation sensor power supply, put
Penetrate sensor and match circuit is sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143027.1A CN106770516A (en) | 2016-12-07 | 2016-12-07 | The measuring method and its measuring system of nitrate ion content in a kind of biological product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611143027.1A CN106770516A (en) | 2016-12-07 | 2016-12-07 | The measuring method and its measuring system of nitrate ion content in a kind of biological product |
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| CN106770516A true CN106770516A (en) | 2017-05-31 |
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| CN201611143027.1A Pending CN106770516A (en) | 2016-12-07 | 2016-12-07 | The measuring method and its measuring system of nitrate ion content in a kind of biological product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959685A (en) * | 2019-03-26 | 2019-07-02 | 深圳绿食宝科技有限公司 | Method and system for measuring nitrate ion content in biological product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393415A (en) * | 2011-11-17 | 2012-03-28 | 江苏大学 | Device and method for measuring greenhouse crop nitrogen potassium content |
| CN102985812A (en) * | 2010-06-17 | 2013-03-20 | 国立大学法人丰桥技术科学大学 | Specification device for water status of soil, and method for same |
| CN105116015A (en) * | 2015-08-17 | 2015-12-02 | 何长毛 | Testing method and device for ion concentration in vegetable or fruit |
-
2016
- 2016-12-07 CN CN201611143027.1A patent/CN106770516A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102985812A (en) * | 2010-06-17 | 2013-03-20 | 国立大学法人丰桥技术科学大学 | Specification device for water status of soil, and method for same |
| CN102393415A (en) * | 2011-11-17 | 2012-03-28 | 江苏大学 | Device and method for measuring greenhouse crop nitrogen potassium content |
| CN105116015A (en) * | 2015-08-17 | 2015-12-02 | 何长毛 | Testing method and device for ion concentration in vegetable or fruit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109959685A (en) * | 2019-03-26 | 2019-07-02 | 深圳绿食宝科技有限公司 | Method and system for measuring nitrate ion content in biological product |
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Application publication date: 20170531 |
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