CN104614350A - Detector for aflatoxin - Google Patents
Detector for aflatoxin Download PDFInfo
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- CN104614350A CN104614350A CN201410828219.0A CN201410828219A CN104614350A CN 104614350 A CN104614350 A CN 104614350A CN 201410828219 A CN201410828219 A CN 201410828219A CN 104614350 A CN104614350 A CN 104614350A
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Abstract
The invention relates to the technical field of food detection, and particularly relates to a detector for aflatoxin. The detector comprises a bare fiber probe, a transmission component, a light source, a photoelectric detector, a driving and conditioning module, a handle, a display screen and a core circuit board, wherein the bare fiber probe is connected with the light source and the photoelectric detector through the transmission component; the bare fiber probe is used for stimulating aflatoxin molecules to generate fluorescence and transmitting the fluorescence to the photoelectric detector; the photoelectric detector is used for converting the fluorescence to photoelectric signals; the driving and conditioning module transmits the photoelectric signals to the core circuit board to perform data analysis; the display screen is used for displaying the analysis result. The detector has the characteristics of miniaturization and portability, is favorable for quality control personnel to quickly measure aflatoxin, and is better than the conventional detection equipment in the detection precision, the accuracy and the limit of detection.
Description
Technical field
The present invention relates to technical field of food detection, particularly relate to a kind of pick-up unit for aflatoxins, be specifically related to the pick-up unit of aflatoxin B1 in a kind of portable edible oil.
Background technology
Edible oil is the requisite cooking materials of people's daily life and energy source, the quality safety of edible oil and the healthy closely bound up of people.Aflatoxin B1 is a kind of strong carcinogen of severe toxicity, and owing to producing the easy mouldy generation aflatoxins of cereal of edible oil, therefore edible oil is usually by this Substances Pollution.The healthy of people is related to the detection of aflatoxins in edible oil, has caused people to pay much attention to.
Aflatoxins detection technique comprises chemical analysis, bioanalysis and immune affinity column method.Chemical analysis and bioanalysis all need pre-service in early stage, and analytic process is complicated, and instrumentation is difficult, equipment is expensive, professional requires high, often needs within several hours to several days, could realize quantitative measurment, is unfavorable for that rapid field is measured.Immune affinity column method often realizes detecting in conjunction with the method such as liquid chromatography or mass spectrum, and detection efficiency improves a lot, but because same needs pre-service in early stage, process is still complicated, is unfavorable for in-site measurement.Current fluorescent spectrometry has also been applied to the measurement of aflatoxins, but the fluorescence detection method of routine generally uses strong ultraviolet light direct irradiation aflatoxins sample, then the fluorescence intensity inspired is detected, but strong ultraviolet light direct irradiation easily makes aflatoxins decompose, and causes accuracy of measurement to reduce, in addition because fluorescence intensity is easily subject to the interference of other factors in light source fluctuation, natural light and edible oil, direct measurement fluorescence intensity measurement jitter, and containing much noise, noise is smaller, measuring accuracy is reduced, even can not use at the environment that sunlight is strong, also have, because conventional method detecting device directly receives fluorescence, no matter light source is correlation or reflection, all can not ensure that the fluorescence inspired in light path is all received by detecting device, the words of correlation close to light source from the fluorescence in the light path away from detector because the light intensity received by detecting device is very faint, and the words of reflection inspire fluorescence because detecting device needs the light maintaining a certain distance guarantee light source with sample to be tested can get on sample and by sample, that only a part of fluorescence is received by detecting device equally, this just causes needing stronger fluorescence detector normal response could export electric signal, and the aflatoxins content in general edible oil is extremely low, stronger fluorescence can not be inspired.Visible, the conventional general detectability of fluorescence detection method is higher, can not be applied to the extremely low sample of aflatoxins content and measure.
Therefore, for above deficiency, need a kind of when aflatoxins detects in edible oil, there is miniaturization, portable feature, be beneficial to quality inspection personnel and measure fast, and accuracy of detection, accuracy and detectability are all better than the device of conventional detection apparatus.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention there is provided a kind of pick-up unit for aflatoxins, when making that aflatoxins detects in edible oil, there is miniaturization, portable feature, facilitate quality inspection personnel to carry out Quick Measurement, and accuracy of detection, accuracy and detectability are all better than the device of conventional detection apparatus.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of pick-up unit for aflatoxins, it comprises naked fine probe, transmission part, light source, photoelectric detector, driving conditioning module, handle, display screen and core circuit plate; Described naked fibre probe is connected with light source and photoelectric detector by transmission part, and described naked fibre probe is used for exciting aflatoxins molecule to produce fluorescence, and by fluorescence transfer in photoelectric detector; It is photosignal that described photoelectric detector is used for fluorescence conversion; Described core circuit plate is connected with light source and photoelectric detector by driving conditioning module, and described display location is on handle and be connected with core circuit plate; Described photoelectric detector carries out data analysis by driving conditioning module to be reached in core circuit plate by photosignal; Described display screen is used for display analysis result.
Wherein, described driving conditioning module comprises the light source driving circuit with modulation function, demodulator circuit and the filtering circuit that are connected with core circuit plate respectively, described light source is connected with light source driving circuit, and described photoelectric detector is connected with demodulator circuit and filtering circuit.
Wherein, described photoelectric detector is connected with filtering apparatus, described filtering apparatus is used for the light of light source in filtering fluorescence.
Wherein, described photoelectric detector is avalanche diode, and described filtering apparatus is optical filter.
Wherein, described naked fibre probe is for peelling off the multimode optical fiber of reflection covering.
Wherein, the shape of described naked fibre probe is spiral fashion.
Wherein, described transmission part is twin-core fiber; One end of described naked fibre probe is connected with the fibre core of in twin-core fiber, and the other end is connected with another fibre core in twin-core fiber.
Wherein, described driving conditioning module comprises the light source driving circuit, demodulator circuit and the filtering circuit that are connected with core circuit plate respectively, and described light source is connected with light source driving circuit, and described photoelectric detector is connected with demodulator circuit and filtering circuit.
Wherein, described light source is purple LED.
Wherein, described core circuit plate comprises power source drive unit, CPU, AD conversion unit, radio communication unit and storage unit, and described power source drive unit is used for providing electric energy for CPU, AD conversion unit and radio communication unit; Described AD conversion unit is used for the photoelectric signal transformation of photoelectric detector transmission being become digital signal and being stored in storage unit; Described CPU carries out computational analysis according to built-in mathematical model to digital signal, and by analysis result display on a display screen; Described storage unit is used for inventory analysis result.
Wherein, described handle is provided with the spatial accommodation for fixing core circuit plate, and handle is provided with the control knob be connected with core circuit plate.
(3) beneficial effect
Technique scheme of the present invention has following beneficial effect: when the present invention is used for the pick-up unit of aflatoxins aflatoxins detects in edible oil, there is miniaturization, portable feature, facilitate quality inspection personnel to carry out Quick Measurement, and accuracy of detection, accuracy and detectability are all better than conventional detection apparatus; And this pick-up unit can avoid the interference of natural light, not by the impact of time and weather, can process for edible oil, food inspection, the field such as quality supervision provide and measure fast and accurately.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention for the pick-up unit of aflatoxins.
Wherein, 1: naked fibre probe; 2: transmission part; 3: light source; 4: drive conditioning module; 5: display screen; 6: control knob; 7: core circuit plate; 8: handle; 9: photoelectric detector.
Embodiment
Below in conjunction with drawings and Examples, embodiments of the present invention are described in further detail.Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.
In describing the invention, except as otherwise noted, the implication of " multiple " is two or more; Term " on ", D score, "left", "right", " interior ", " outward ", " front end ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
As shown in Figure 1, the pick-up unit for aflatoxins that the present embodiment provides, it comprises naked fibre probe 1, transmission part 2, light source 3, photoelectric detector 9, drives conditioning module 4, handle 8, display screen 5 and core circuit plate 7; Naked fibre probe 1 is connected with light source 3 and photoelectric detector 9 by transmission part 2, and naked fibre probe 1 produces fluorescence for exciting aflatoxins molecule, and by fluorescence transfer in photoelectric detector 9; Photoelectric detector 9 is for being photosignal by fluorescence conversion; Core circuit plate 7 is connected with light source 3 and photoelectric detector 9 by driving conditioning module 4, and display screen 5 to be positioned on handle 8 and to be connected with core circuit plate 7; Photoelectric detector 9 carries out data analysis by driving conditioning module 4 to be reached in core circuit plate 7 by photosignal; Display screen 5 is for display analysis result.This pick-up unit when aflatoxins detects in edible oil, has miniaturization and portable feature, facilitate quality inspection personnel to carry out Quick Measurement, and accuracy of detection, accuracy and detectability is all better than conventional checkout equipment.
In the present embodiment, naked fibre probe 1 is for peelling off the multimode optical fiber of reflection covering, concrete, and naked fibre probe 1 can be made up of a root multimode fiber, and its diameter is 1mm, and length is 1.5m.Optical fiber is peelled off the reflection covering of outside, its fibre core material is polystyrene, be rich in hydrophobic bond, easy absorption sample molecules, fibre core surface, through corrosion treatment, makes surface become coarse, total reflection condition is by partial destruction, therefore a part of light is easy to overflow from fibre core, because the light of effusion is few, is unlikely to aflatoxins is decomposed.But the aflatoxins molecule being attracted to optical fiber rough surface can be inspired fluorescence, the fluorescence inspired directly enters inside of optical fibre, be sent to photoelectric detector 9 end by optical fiber, the method can the aflatoxins on excitation fiber surface, and has high sensitivity.
Further, the shape of naked fibre probe 1 can be spiral fashion.Meanwhile, transmission part 2 is twin-core fiber; One end of naked fibre probe 1 is connected with the fibre core of in twin-core fiber, and the other end is connected with another fibre core in twin-core fiber.The exposed optical fiber of this root is by from bent intermediate, and then two ends are coiled in the shape of a spiral, and screw diameter is 5cm, and length is 15cm, and one is merged into by the stainless-steel tube that fiber tip is 5mm by diameter.Object is in order to extended fiber length, increase the contact area of optical fiber and sample, improve the amount of fluorescence inspired, thus raising detectability, two fibre core weldings in two profile of optic fibre of last optical fiber end and twin-core fiber, in twin-core fiber, two fibre cores are one-in-and-one-out, light in every root fibre core is all one-way transmission, after light sends from light source, a fibre core first in twin-core fiber enters naked fibre probe 1, after being transmitted across in naked fibre probe 1, the light loss of part light source loses, add the fluorescence that a part inspires simultaneously, then these light another root fibre core in twin-core fiber is finally simultaneously sent to photoelectric detector 9 end.
Due to reach photoelectric detector 9 light in except containing the light also having light source to produce except fluorescence, in order to obtain pure fluorescence, photoelectric detector 9 is connected with filtering apparatus, filtering apparatus is used for the light of light source 3 in filtering fluorescence.
Preferably, photoelectric detector 9 adopts high-sensitive avalanche diode, has installed bandpass filter before it additional, and after being filtered by the light of light source 3, what received by photoelectric detector 9 is exactly clean fluorescence.
Wherein, light source is purple LED, and wavelength is 370nm.
Wherein, drive conditioning module 4 to comprise the light source driving circuit, demodulator circuit and the filtering circuit that are connected with core circuit plate 7 respectively, light source 3 is connected with light source driving circuit, and photoelectric detector 9 is connected with demodulator circuit and filtering circuit.By drive in conditioning module 4 light source driving circuit with modulation function and demodulator circuit with the use of, intensity and the life-span of fluorescence can be measured simultaneously.Core circuit plate 7 comprises power source drive unit, CPU, AD conversion unit, radio communication unit and storage unit, and power source drive unit comprises lithium ion battery and charge-discharge circuit, for providing electric energy for CPU, AD conversion unit and radio communication unit; AD conversion unit is used for the photoelectric signal transformation that photoelectric detector 9 transmits being become digital signal and being stored in storage unit; CPU carries out computational analysis according to built-in mathematical model to digital signal, and is presented at by analysis result on display screen 5; Storage unit is used for inventory analysis result.
Concrete, light source driving circuit has modulation function, and during measurement, it is the sine wave superposing 35KHz on the square wave basis of 5KHz frequency that light source driving circuit exports.Therefore, the light that purple LED sends will change by identical rule; Meanwhile, the fluorescence inspired has same Changing Pattern, after fluorescence to avalanche diode, makes avalanche diode with same rate-adaptive pacemaker electric current, and after the demodulation and filtering and noise reduction of demodulator circuit and filtering circuit, signal now becomes very clean; Then gathered by the AD conversion unit on core circuit plate 7 after converting direct current to, and become digital signal, last CPU, according to built-in mathematical model, calculates measurement result, and is presented on display screen 5, simultaneously, internal storage unit stores this measurement result, and stored contents comprises measures numbering, Measuring Time, measurement result, memory capacity is 20000.
Wherein, core CPU is a slice MSP430 single-chip microcomputer, super low-power consumption, and energy supply control module is used for providing 12V stabilized power source for whole system, and wireless communication unit uses WIFI wireless module, directly can carry out data communication with computing machine or mobile phone.
Handle 8 is provided with the spatial accommodation for fixing core circuit plate 7, and handle 8 is provided with the control knob 6 be connected with core circuit plate 7.Be worth illustrating, handle 8 can be a shell structure, can do to hold for operating personnel, and meanwhile, it is also for internal circuit blocks provides shell to protect.The shape of handle 8 is not limited to certain particular form, flexible design can be carried out according to actual needs, such as: the shape of handle 8 is a diameter is the hollow cylinder of 6cm, outer casing thickness is 0.3mm, stainless steel, and length is about 15cm, inside is provided with the lithium ion battery of 5000mAh, can measure 500-600 time, have one piece of LCDs above shell, for man-machine interaction.
In work, the pick-up unit that the present invention is used for aflatoxins is as follows to the testing process of aflatoxin B1 in peanut oil: drop in tested peanut oil by naked fibre probe; Start, display display system on screen starting state; After waiting system is stable, flicking measures button once; Then naked fibre probe is kept to be immersed in peanut oil motionless; After general 20s, display screen just demonstrates this measurement result, include without aflatoxin B1 qualitative results.If aflatoxin B1 detected, the concentration providing aflatoxin B1 that also can be quantitative.
In sum, when the present invention is used for the pick-up unit of aflatoxins aflatoxins detects in edible oil, there is miniaturization, portable, facilitate quality inspection personnel to carry out Quick Measurement, and accuracy of detection, accuracy and detectability are all better than conventional detection apparatus; And through overmodulated circuit to modulation of source, coordinate the demodulation filtering of photo-detector output signal, this pick-up unit can avoid the interference of natural light, not by the impact of time and weather, can process for edible oil, food inspection, the field such as quality supervision provide and measure fast and accurately.
Embodiments of the invention provide in order to example with for the purpose of describing, and are not exhaustively or limit the invention to disclosed form.Many modifications and variations are apparent for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (10)
1. the pick-up unit for aflatoxins, it is characterized in that, comprise naked fibre probe (1), transmission part (2), light source (3), photoelectric detector (9), drive conditioning module (4), handle (8), display screen (5) and core circuit plate (7); Described naked fibre probe (1) is connected with light source (3) and photoelectric detector (9) by transmission part (2), described naked fibre probe (1) produces fluorescence for exciting aflatoxins molecule, and by fluorescence transfer in photoelectric detector (9); Described photoelectric detector (9) is for being photosignal by fluorescence conversion;
Described core circuit plate (7) is connected with light source (3) and photoelectric detector (9) by driving conditioning module (4), and described display screen (5) is positioned at handle (8) and goes up and be connected with core circuit plate (7); Described photoelectric detector (9) carries out data analysis by driving conditioning module (4) to be reached in core circuit plate (7) by photosignal; Described display screen (5) is for display analysis result.
2. the pick-up unit for aflatoxins according to claim 1, it is characterized in that, described driving conditioning module (4) comprises the light source driving circuit with modulation function, demodulator circuit and the filtering circuit that are connected with core circuit plate (7) respectively, described light source (3) is connected with light source driving circuit, and described photoelectric detector (9) is connected with demodulator circuit and filtering circuit.
3. the pick-up unit for aflatoxins according to claim 1, is characterized in that, described naked fibre probe (1) for peel off reflection covering and fibre core surface through corrosion treatment, make the multimode optical fiber that surface becomes coarse.
4. the pick-up unit for aflatoxins according to claim 3, is characterized in that, the shape of described naked fibre probe (1) is spiral fashion.
5. the pick-up unit for aflatoxins according to claim 1, is characterized in that, described transmission part (2) is twin-core fiber; One end of described naked fibre probe (1) is connected with the fibre core of in twin-core fiber, and the other end is connected with another fibre core in twin-core fiber.
6. the pick-up unit for aflatoxins according to claim 1, is characterized in that, (9) are connected with filtering apparatus with described photoelectric detector, and described filtering apparatus is used for the light of light source (3) in filtering fluorescence.
7. the pick-up unit for aflatoxins according to claim 6, is characterized in that, described photoelectric detector (9) is avalanche diode; Described filtering apparatus is optical filter.
8. the pick-up unit for aflatoxins according to claim 1, is characterized in that, described light source (3) is purple LED.
9. the pick-up unit for aflatoxins according to claim 1, it is characterized in that, described core circuit plate (7) comprises power source drive unit, CPU, AD conversion unit, radio communication unit and storage unit, and described power source drive unit is used for providing electric energy for CPU, AD conversion unit and radio communication unit; Described AD conversion unit is used for the photoelectric signal transformation that photoelectric detector (9) transmits to become digital signal; Described CPU carries out computational analysis according to built-in mathematical model to digital signal, and is presented at by analysis result on display screen (5); Described storage unit is used for inventory analysis result.
10. the pick-up unit for aflatoxins according to claim 1, it is characterized in that, described handle (8) is provided with the spatial accommodation for fixing core circuit plate (7), and handle (8) is provided with the control knob (6) be connected with core circuit plate (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828219.0A CN104614350A (en) | 2014-12-25 | 2014-12-25 | Detector for aflatoxin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410828219.0A CN104614350A (en) | 2014-12-25 | 2014-12-25 | Detector for aflatoxin |
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| CN104614350A true CN104614350A (en) | 2015-05-13 |
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| CN201410828219.0A Pending CN104614350A (en) | 2014-12-25 | 2014-12-25 | Detector for aflatoxin |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2502265Y (en) * | 2001-10-12 | 2002-07-24 | 国家海洋局第一海洋研究所 | Portable real-time all fibre-optical fluophotometer |
| CN101551331A (en) * | 2009-02-25 | 2009-10-07 | 苏州纳米技术与纳米仿生研究所 | Mercury ion optical fiber detector based on fluorescence quenching cyclometalated iridium fluorescent complex |
| CN101666747A (en) * | 2008-09-04 | 2010-03-10 | 北京金达清创环境科技有限公司 | Array fibre evanescent wave biosensor system |
| CN102095701A (en) * | 2010-11-12 | 2011-06-15 | 重庆大学 | Method for online separation and measurement of biomass concentration by optical fiber attenuation total-reflection sensor |
| CN202351177U (en) * | 2011-11-25 | 2012-07-25 | 遵义师范学院 | Aflatoxin detector based on ultraviolet LED light source |
| CN102841080A (en) * | 2012-08-06 | 2012-12-26 | 上海交通大学 | Two-parameter optical fiber sensor used for measurement of pH value and dissolved oxygen |
| US20130006116A1 (en) * | 2010-01-25 | 2013-01-03 | University Health Network | System and method for sub-surface fluorescence imaging |
| WO2014124531A1 (en) * | 2013-02-14 | 2014-08-21 | British Columbia Cancer Agency Branch | Integrated spectral probe for raman, reflectance and fluorescence spectral measurements |
-
2014
- 2014-12-25 CN CN201410828219.0A patent/CN104614350A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2502265Y (en) * | 2001-10-12 | 2002-07-24 | 国家海洋局第一海洋研究所 | Portable real-time all fibre-optical fluophotometer |
| CN101666747A (en) * | 2008-09-04 | 2010-03-10 | 北京金达清创环境科技有限公司 | Array fibre evanescent wave biosensor system |
| CN101551331A (en) * | 2009-02-25 | 2009-10-07 | 苏州纳米技术与纳米仿生研究所 | Mercury ion optical fiber detector based on fluorescence quenching cyclometalated iridium fluorescent complex |
| US20130006116A1 (en) * | 2010-01-25 | 2013-01-03 | University Health Network | System and method for sub-surface fluorescence imaging |
| CN102095701A (en) * | 2010-11-12 | 2011-06-15 | 重庆大学 | Method for online separation and measurement of biomass concentration by optical fiber attenuation total-reflection sensor |
| CN202351177U (en) * | 2011-11-25 | 2012-07-25 | 遵义师范学院 | Aflatoxin detector based on ultraviolet LED light source |
| CN102841080A (en) * | 2012-08-06 | 2012-12-26 | 上海交通大学 | Two-parameter optical fiber sensor used for measurement of pH value and dissolved oxygen |
| WO2014124531A1 (en) * | 2013-02-14 | 2014-08-21 | British Columbia Cancer Agency Branch | Integrated spectral probe for raman, reflectance and fluorescence spectral measurements |
Non-Patent Citations (1)
| Title |
|---|
| 初凤红等: "基于荧光猝灭原理的硝基芳烃类爆炸物检测实验研究", 《中国激光》 * |
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