CN105445253A - Equipment for detecting concentration of antibiotics in water - Google Patents
Equipment for detecting concentration of antibiotics in water Download PDFInfo
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- CN105445253A CN105445253A CN201510778059.8A CN201510778059A CN105445253A CN 105445253 A CN105445253 A CN 105445253A CN 201510778059 A CN201510778059 A CN 201510778059A CN 105445253 A CN105445253 A CN 105445253A
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- equipment
- upper cover
- antibiotic concentration
- light
- antibiotics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
Abstract
The invention discloses equipment for detecting the concentration of antibiotics in water. The equipment comprises a lower seat, an upper cover, a rotating shaft, a light source, a scattered light extraction device, a detector and a circuit main board, wherein the lower seat is connected with the upper cover through the rotating shaft; a groove is formed in the lower seat; a layer of metal plate serving as a pole of an electric field is paved at the bottom of the groove; a layer of metal plate serving as the other pole of the electric field is arranged at a position, which is opposite to the upper surface of the lower seat, of the upper cover; the light source is mounted at a position, which is opposite to the groove, of the upper cover; the scattered light extraction device is mounted at the position, which is opposite to the groove, of the upper cover; the detector is mounted on the upper cover; the circuit main board is connected with the detector. The equipment enhances raman scattered light of the antibiotics in a water sample by graphene and an electric field enhancement technology, so that the equipment is extremely low in detection limit and extremely high in sensitivity and accuracy.
Description
Technical field
The present invention relates to detection field, particularly, relating to a kind of equipment for detecting antibiotic concentration in water.
Background technology
Microbiotic is widely used in the bacteriosis controlling the mankind, poultry and aquatic animal.But, through long-term use, it is found that microbiotic has a lot of harm to the health of the mankind and environment.A lot of microbiotic is to all toxic reaction of the mankind, and a large amount of microbiotic that uses can develop immunity to drugs.Therefore, countries in the world are launched respectively policy and are forbidden or limit antibiotic use.
Detect residual antibiotic method at present both at home and abroad and mainly comprise bioassay method (microbiological assay, radioreceptor assay etc.), Physico-chemical tests method (spectral method, chromatography and coupling technique thereof etc.) and immunoassay (radioimmunoassay, enzymoimmunoassay, fluorescence immunoassay etc.).Bioassay method utilizes some biology to come to measure antibiotic method qualitatively or quantitatively to antibiotic special reaction.Physico-chemical tests method is under the certain environment condition in laboratory, by various instrument, equipment and reagent, and use physics, the method for chemistry carrys out a kind of method of checking and appraising commercial quality.In addition, people is also had to be detected by spectrographic technique, especially Raman spectrum.Because spectrographic technique is not by the impact of hydrone, can measure the element in water well.Therefore, large quantifier elimination has been carried out to detection antibiotic in water, but mainly still carried out conventional Raman analysis in the lab, also had people to be incorporated in detection by surface enhanced material, mainly gold or silver-colored colloidal sol plasma membrane, for strengthening Raman signal.
But bioassay method needs measured object to be acted on certain biology, but also needs to observe biological physiological reaction.Therefore, the detection sensitivity of bioassay method is lower, consuming time very long, and larger by impact that is individual and method of operating.Although the accuracy of Physico-chemical tests method is high, highly sensitive, but instrument and equipment and running program more complicated, testing cost is expensive, length consuming time, analysis can not be detected fast, but also require that reviewer possesses sturdy basic theoretical knowledge and skilled operative technique., there is the defect that false positive rate is high in immunoassay complicated operation simultaneously.Conventional Raman spectra detection process is main or for lab analysis, accuracy and portability have very large restriction.Complicacy due to in-site measurement limits the use of large-scale highly sophisticated device, and existing technology still can not meet the needs of in-site measurement.In addition, although use surface enhanced material to make the certain improvement of detection existence, but, the preparation process of the substrate that some sensitivity are higher is comparatively complicated, have higher requirement to its roughness, and specific aim is comparatively strong, simultaneously, in testing process, pH and temperature are required relatively stricter, be difficult to be applied in Site Detection.
Summary of the invention
The object of this invention is to provide a kind of equipment for detecting antibiotic concentration in water.Described equipment coordinates the Raman diffused light of electric-field enhancing technology to water sample to strengthen by Graphene, can not only realize Site Detection, but also has extremely low detectability and high sensitivity and accuracy.
To achieve these goals, the invention provides a kind of equipment for detecting antibiotic concentration in water.Described equipment comprises: lower seat, upper cover, turning axle, light source, scattered light extraction element, detector and circuit main board, and described lower seat is connected with described upper cover by described turning axle; Described lower seat is provided with a groove, and the bottom of described groove is equipped with layer of metal plate using the pole as electric field; Described upper cover is just provided with layer of metal plate using another pole as electric field to the position of described lower seat upper surface; Described light source is installed on described upper cover just to the position of described groove; Described scattered light extraction element, is installed on described upper cover just to the position of described groove, for when described light source launches incident light, receives from the scattered light in the water sample of described groove, and extract Raman diffused light from described scattered light; Described detector, be installed on described on cover, for receiving described Raman diffused light, and convert described Raman diffused light to electric signal; And described circuit main board, be connected with described detector, for calculating antibiotic concentration in described water sample according to described electric signal and preset relation formula.
Wherein, the upper surface of the sheet metal of described bottom portion of groove is coated with one deck and is solidified the surface enhanced material formed on silica by bilayer graphene.
Wherein, described equipment also comprises: buckle, is installed on described turning axle, for when detecting antibiotic concentration in described water sample, locks described lower seat and described upper cover, can not relative movement after fitting to make described lower seat and described upper cover.
Wherein, described equipment also comprises handle, and described handle is formed by described upper cover afterbody proper extension.
Wherein, the LD laser diode of described light source to be optical maser wavelength be 785nm.
Wherein, described handle internal fixtion has rechargeable battery, and described rechargeable battery is used for providing power supply for described LD laser diode, detector and circuit main board.
Wherein, described scattered light extraction element comprises: receiver lens, light conditioner, polaroid wheel, spectro-grating and condenser lens, and described receiver lens, for receiving from the scattered light in the water sample of described groove; Described light conditioner, is positioned on the center line of described receiver lens, for nursing one's health described scattered light; Described polaroid wheel, is positioned on the center line of described light conditioner, for extracting polarized light from described scattered light; Described spectro-grating, is positioned at described polaroid with the angle of not taking turns central axis with described polaroid and takes turns on center line, for separating of the polarized light of different wave length to obtain Raman diffused light; Described condenser lens, for assembling described Raman diffused light.
Wherein, described equipment also comprises: touching display screen, is connected with described circuit main board, for inputting the Antibiotics information that user selects, and shows antibiotic concentration in described water sample.
Wherein, described circuit main board comprises: signal amplifying apparatus, for amplifying the electric signal from described detector; Noise elimination apparatus, is connected with described signal amplifying apparatus, for eliminating the noise of the electric signal after amplifying; Data storage device, for storing default relational expression and antibiotic concentration in the described water sample calculated; And control device, be connected with described noise elimination apparatus and described data storage, Antibiotics information for selecting according to user selects the preset relation formula corresponding with Antibiotics information from the preset relation formula of described data storage device stores, and calculates corresponding antibiotic concentration in described water sample according to the electric signal of stress release treatment and the preset relation formula corresponding to Antibiotics information.
Wherein, the Antibiotics information of described control device also for selecting according to user regulates the voltage of described electric field and select corresponding polaroid from described polaroid wheel.
Pass through technique scheme, Raman diffused light is extracted from the scattered light of water sample, and Raman diffused light is converted to electric signal and calculate antibiotic concentration in water sample according to electric signal and preset relation formula, can not only Site Detection be realized, but also there is extremely low detectability and high sensitivity and accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of the equipment for detecting antibiotic concentration in water provided by the invention.
Description of reference numerals
1 positive pole copper coin 2 surface enhanced material 3 sample supporting spring 4 negative pole copper coin
5 light source 6 light source filter plate 7 exit lens 8 light conditioners
9 spectro-grating 10 polaroids take turns 11 condenser lens 12 planar array detectors
13 circuit main board 14 touching display screen 15 rechargeable battery 16 turning axles
17 power supplys and data-interface 18 times seat 19 upper covers
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Fig. 1 is the structural representation of the equipment for detecting antibiotic concentration in water provided by the invention.As shown in Figure 1, provided by the inventionly to comprise for detecting the equipment of antibiotic concentration in water: lower seat 18, upper cover 19, turning axle 16, light source 5, scattered light extraction element, detector and circuit main board 13, described lower seat 18 is connected with described upper cover 19 by described turning axle 16; Described lower seat 18 is provided with a groove, and the bottom of described groove is equipped with layer of metal plate using the pole as electric field; Described upper cover 19 is just provided with layer of metal plate using another pole as electric field to the position of described lower seat 18 upper surface; Described light source 5 is installed on described upper cover 19 just to the position of described groove; Described scattered light extraction element, is installed on described upper cover 19 just to the position of described groove, for when described light source 5 launches incident light, receives from the scattered light in the water sample of described groove, and extract Raman diffused light from described scattered light; Described detector, being installed on described upper cover 19, for receiving described Raman diffused light, and converting described Raman diffused light to electric signal; And described circuit main board 13, be connected with described detector, for calculating antibiotic concentration in described water sample according to described electric signal and preset relation formula.By this, described equipment can not only realize Site Detection, but also has extremely low detectability and high sensitivity and accuracy.
In a particular embodiment, described lower seat 18 has a sample supporting spring 3, and its center has the groove that the degree of depth is 1mm, and described groove is for placing water sample.The layer of metal plate of described bottom portion of groove is positive pole copper coin 1, and described positive pole copper coin 1 is the copper coin as electric field positive pole.The layer of metal plate that described upper cover is just being arranged the position of described lower seat upper surface is negative pole copper coin 2, and described negative pole copper coin 2 is the copper coin as electric field negative pole.Why electric field is set between lower seat 18 and upper cover 19, is because the intensity of the Raman diffused light of water sample can be improved like this, thus improves the precision detected.Preferably, the upper surface of the positive pole copper coin 1 of described bottom portion of groove is coated with one deck and is solidified the surface enhanced material 2 formed on silica by bilayer graphene.By this, the intensity of the Raman diffused light of water sample can be strengthened further.Preferably, described equipment also comprises: buckle, is installed on described turning axle 16, for when detecting antibiotic concentration in described water sample, lock described lower seat 18 and described upper cover 19, can not relative movement after fitting to make described lower seat 18 and described upper cover 19.Particularly, equipment provided by the invention mainly comprises lower seat 18 and upper cover 19 two large divisions, is connected between two large divisions by turning axle 16, and can realize rotating around turning axle 16 center line, and upper and lower two large divisions is closely adhered to together.When needs detect antibiotic concentration in water sample, operating personnel press upper cover 19.After upper cover 19 and lower seat 18 are fitted, operating personnel's operate clasp is to lock lower seat 18 and upper cover 19, thus makes lower seat 18 and upper cover 19 can not relative movement.After completing detection, operating personnel open buckle, and upper cover 19 and lower seat 18 are separately.Now, the water sample in lower seat 18 groove can be cleared up or change.Why in needs detection water sample, when antibiotic concentration, using the tight lower seat of lock 18 of buckle and upper cover 19, is because can eliminate the interference of natural light like this.
In concrete application, described light source 5 for optical maser wavelength be the LD laser diode of 785nm, its volume is little, stability is high.By this, fluorescence interference can be overcome.Described scattered light extraction element comprises: receiver lens, light conditioner 8, polaroid wheel 10, spectro-grating 9 and condenser lens 11, and described receiver lens, for receiving from the scattered light in the water sample of described groove; Described light conditioner 8, is positioned on the center line of described receiver lens, for nursing one's health described scattered light; Described polaroid wheel 10, is positioned on the center line of described light conditioner 8, for extracting polarized light from described scattered light; Described spectro-grating 9, is positioned at described polaroid with the angle of not taking turns central axis with described polaroid and takes turns on 10 center lines, for separating of the polarized light of different wave length to obtain Raman diffused light; Described condenser lens 11, for assembling described Raman diffused light.Particularly, light conditioner 8 comprises slit, optical filter and lens, slit for regulate Raman diffused light by intensity and precision, optical filter is used for the light of filtering from LD laser diode, lens, for adjusting the direction of scattered light, are beaten to make scattered light and are taken turns on the polaroid in 10 at polaroid below.Polaroid extracts polarized light from described scattered light, is not only conducive to scattered light extraction element and extracts Raman diffused light, but also enhance the antijamming capability of scattered light extraction element.In a particular embodiment, just the position of groove is provided with two through holes, is fixed with lens respectively at negative pole copper coin 4, one is the exit lens 7 of LD laser diode, and another is the receiver lens of scattered light extraction element.Light source filter plate 6 is also provided with between LD laser diode and exit lens 7.The incident light launched by LD laser diode arrives the water sample in groove successively via light source filter plate 6 and exit lens 7.The scattered light of consequent water sample arrives detector via receiver lens, light conditioner 8, polaroid wheel 10, spectro-grating 9 and condenser lens 11 successively.It should be noted that, Raman diffused light can gather on detector by condenser lens 11, thus improves the collecting efficiency of detector to Raman diffused light.Wherein, detector is planar array detector 12.
In the optional embodiment of one, described equipment also comprises: input media, is connected with described circuit main board, for inputting the Antibiotics information that user selects; Display device, is connected with described circuit main board, for showing antibiotic concentration in described water sample.Preferably, described input media and described display device are touching display screen 14, and described touching display screen is connected with described circuit main board, for inputting the Antibiotics information that user selects, and show antibiotic concentration in described water sample.By this, the redundancy of equipment is avoided.
In a particular embodiment, described circuit main board 13 comprises: signal amplifying apparatus, for amplifying the electric signal from described detector; Noise elimination apparatus, is connected with described signal amplifying apparatus, for eliminating the noise of the electric signal after amplifying; Data storage device, for storing default relational expression and antibiotic concentration in the described water sample calculated; And control device, be connected with described noise elimination apparatus and described data storage, Antibiotics information for selecting according to user selects the preset relation formula corresponding with Antibiotics information from the preset relation formula of described data storage device stores, and calculates corresponding antibiotic concentration in described water sample according to the electric signal of stress release treatment and the preset relation formula corresponding to Antibiotics information.Wherein, described default relational expression comprises the respective intensity of raman spectral characteristics position of spectral line of specific several microbiotic in water sample and the relation of concentration.By this, the Antibiotics information can selected according to user calculates corresponding antibiotic concentration in water sample.
Preferably, the Antibiotics information of described control device also for selecting according to user regulates the voltage of described electric field and select corresponding polaroid from described polaroid wheel.By this, the Antibiotics information can selected according to user more accurately calculates corresponding antibiotic concentration in water sample.
Particularly, equipment provided by the invention can detect the concentration of Multiple Classes of Antibiotics in water.When user needs to detect the concentration of certain microbiotic in water, user selects input Antibiotics information by touching display screen.Then, control device selects the Antibiotics information inputted to regulate voltage of electric field can match with Antibiotics to make voltage of electric field according to user.Control device also selects the Antibiotics information inputted to select corresponding polaroid from described polaroid wheel according to user.Cause different types of microbiotic not identical in the requirement of the intensity of the light in different polarization direction this is because different types of antibiotic sign intramolecule chemical bond oscillations feature is not identical.From described polaroid wheel, corresponding polaroid is selected according to antibiotic kind, also namely corresponding polaroid is selected according to antibiotic sign intramolecule chemical bond oscillations feature, not only be conducive to scattered light extraction element and extract Raman diffused light, but also enhance the antijamming capability of scattered light extraction element.Light signal is beaten after on planar array detector, system obtains a raman spectral signal, the Antibiotics information that control device is selected according to user selects the intensity of raman spectral characteristics position of spectral line corresponding with Antibiotics information and the relational expression of concentration from the preset relation formula of described data storage device stores, then the spectral intensity of tested antibiotic raman spectral characteristics spectral line position is substituted in relational expression and calculates corresponding antibiotic concentration in described water sample.
Wherein, the intensity of corresponding with tested microbiotic raman spectral characteristics position of spectral line and the relational expression of tested antibiotic concentration are:
Wherein, C is tested antibiotic concentration, I
wfor the light intensity of raman spectral characteristics position of spectral line, W is characteristic peak place wavelength, w
hand w
lbe respectively the beginning wavelength of Raman spectrum characteristic peak and terminate wavelength, a and b is respectively constant.
Preferably, described equipment also comprises handle, and described handle is formed by described upper cover 19 afterbody proper extension.By this, facilitate hand-held.Preferably, described handle internal fixtion has rechargeable battery 15, and described rechargeable battery 15 is for providing power supply for described LD laser diode, detector and circuit main board 13.By this, described equipment is not only portable, and is conducive to realizing Site Detection.In addition, power supply and data-interface 17 are arranged on the tail end of handle, and described power supply and data-interface 17 are USB interface.
Equipment provided by the invention is a kind of portable, and can in water the equipment of detection of antibiotics concentration, the concentration of Multiple Classes of Antibiotics in water can be measured, antibiotic kind is selected by user, equipment regulates voltage of electric field according to the Antibiotics information that user selects and select corresponding polaroid from polaroid wheel, the Raman diffused light of electric-field enhancing technology to water sample is coordinated to strengthen by Graphene, thus equipment is had be low to moderate the detectability of 1ppb and high accuracy, measure fast, easy to use.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out combination in any between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. for detecting an equipment for antibiotic concentration in water, it is characterized in that, described equipment comprises: lower seat, upper cover, turning axle, light source, scattered light extraction element, detector and circuit main board,
Described lower seat is connected with described upper cover by described turning axle;
Described lower seat is provided with a groove, and the bottom of described groove is equipped with layer of metal plate using the pole as electric field;
Described upper cover is just provided with layer of metal plate using another pole as electric field to the position of described lower seat upper surface;
Described light source is installed on described upper cover just to the position of described groove;
Described scattered light extraction element, is installed on described upper cover just to the position of described groove, for when described light source launches incident light, receives the scattered light of the water sample from described groove, and extract Raman diffused light from described scattered light;
Described detector, be installed on described on cover, for receiving described Raman diffused light, and convert described Raman diffused light to electric signal; And
Described circuit main board, is connected with described detector, for calculating antibiotic concentration in described water sample according to described electric signal and preset relation formula.
2. the equipment for detecting antibiotic concentration in water according to claim 1, is characterized in that, the upper surface of the sheet metal of described bottom portion of groove is covered with one deck and is solidified the surface enhanced material formed on silica by bilayer graphene.
3. the equipment for detecting antibiotic concentration in water according to claim 1, is characterized in that, described equipment also comprises:
Buckle, is installed on described turning axle, for when detecting antibiotic concentration in described water sample, locks described lower seat and described upper cover, can not relative movement after fitting to make described lower seat and described upper cover.
4. the equipment for detecting antibiotic concentration in water according to claim 3, is characterized in that, described equipment also comprises handle, and described handle is formed by described upper cover afterbody proper extension.
5. the equipment for detecting antibiotic concentration in water according to claim 4, is characterized in that, the LD laser diode of described light source to be optical maser wavelength be 785nm.
6. the equipment for detecting antibiotic concentration in water according to claim 5, is characterized in that, described handle internal fixtion has rechargeable battery, and described rechargeable battery is used for providing power supply for described LD laser diode, detector and circuit main board.
7. the equipment for detecting antibiotic concentration in water according to claim 1, is characterized in that, described scattered light extraction element comprises:
Receiver lens, light conditioner, polaroid wheel, spectro-grating and condenser lens,
Described receiver lens, for receiving the scattered light of the water sample from described groove;
Described light conditioner, is positioned on the center line of described receiver lens, for nursing one's health described scattered light;
Described polaroid wheel, is positioned on the center line of described light conditioner, for extracting polarized light from described scattered light;
Described spectro-grating, is positioned at described polaroid with the angle of not taking turns central axis with described polaroid and takes turns on center line, for separating of the polarized light of different wave length to obtain Raman diffused light;
Described condenser lens, for assembling described Raman diffused light.
8. the equipment for detecting antibiotic concentration in water according to claim 7, is characterized in that, described equipment also comprises:
Touching display screen, is connected with described circuit main board, for inputting the Antibiotics information that user selects, and shows antibiotic concentration in described water sample.
9. the equipment for detecting antibiotic concentration in water according to claim 8, is characterized in that, described circuit main board comprises:
Signal amplifying apparatus, for amplifying the electric signal from described detector;
Noise elimination apparatus, is connected with described signal amplifying apparatus, for eliminating the noise of the electric signal after amplifying;
Data storage device, for storing default relational expression and antibiotic concentration in the described water sample calculated; And
Control device, be connected with described noise elimination apparatus and described data storage, Antibiotics information for selecting according to user selects the preset relation formula corresponding with Antibiotics information from the preset relation formula of described data storage device stores, and calculates corresponding antibiotic concentration in described water sample according to the electric signal of stress release treatment and the preset relation formula corresponding to Antibiotics information.
10. the equipment for detecting antibiotic concentration in water according to claim 9, it is characterized in that, the Antibiotics information of described control device also for selecting according to user regulates the voltage of described electric field and select corresponding polaroid from described polaroid wheel.
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| CN201510778059.8A CN105445253B (en) | 2015-11-12 | 2015-11-12 | A kind of equipment for detecting antibiotic concentration in water |
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| CN201510778059.8A CN105445253B (en) | 2015-11-12 | 2015-11-12 | A kind of equipment for detecting antibiotic concentration in water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106770173A (en) * | 2017-01-05 | 2017-05-31 | 江苏大学 | A kind of MCNCs/PMAA magnetic control Raman aptamer sensor preparation methods for antibiotics leftover detection |
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