CN207020190U - The effluent piece of antibiotic residue in a kind of detection food - Google Patents

Abstract

The utility model discloses a kind of effluent piece for detecting antibiotic residue, the effluent piece includes a detection and blocked, and described detection card includes backing, and sample pad, gold standard pad, nitrocellulose filter, detection zone, quality control region and absorption pad on backing.Effluent piece of the present utility model can detect Multiple Classes of Antibiotics simultaneously, the quick detection of antibiotic residue suitable for food.

Description

The effluent piece of antibiotic residue in a kind of detection food

Technical field

Detection inspection technology field is the utility model is related to, by antigen-antibody immune response in immunochemistry by means of layer Analysis technology reaches testing goal, more particularly to a kind of effluent piece for detecting antibiotic residue in food.

Background technology

With the fast development of China's economy, people's seeking results maximize, and the use of antibiotic is more and more common, such as use The mastitis of antibiosis extract for treating milk cow；Antibiotic and hormone are added in livestock and poultry cultivation family in feed, improve the resistance against diseases of breeding stock And appetite；Aquaculture user in order to allow steamed crab to accelerate de-hulling process, grow loose vigorous, to a large amount of antibiotic of crab feeding and Hormone etc..China is antibiotics production and using big country, there are about 6000 tons of antibiotic every year according to statistics and is used for feed addictive, accounts for The 50% of global antibiotic feed additive.

To the health of people, expert points out serious threat a large amount of abuses of antibiotic, often edible containing anti- The food of raw element, even micro, can also make one nettle rash occur or cause anaphylactic shock.Often intake contains antibiotic Food, some bacterial strains can be made to produce drug resistances, so as to bring the difficulty of some person poultry diseases of prevention and treatment.If long-term food With the food of antibiotic residue, the death of some non-pathogenic bacterias in human body can be caused, makes colony balance imbalance or causes riboflavin Deficiency disease and purpuric damage.The particularly abuse of chloramphenicol, easily damages the hematopoiesis function of human marrow, and thus causes again The generation of raw aplastic anemia.

In general, the products such as meat (livestock and poultry), fishes and shrimps (aquatic products), eggs, milk, feed, honey need to carry out antibiosis Element detection, common method include：Liquid chromatogram or liquid chromatogram and mass spectrometry, Antimicrobial method and enzyme-linked immunoassay method. Above-mentioned detection method needs to coordinate detecting instrument to use, and detection time is longer, complex operation, is not easy to Site Detection.Therefore, It is badly in need of the reagent and method of detection antibiotic residue easy to use, reliable results in this area.

Utility model content

The purpose of this utility model is to provide a kind of effluent piece of detection antibiotic residue easy to use, reliable results.

In first aspect of the present utility model, there is provided a kind of effluent piece for detecting antibiotic residue, the effluent piece bag A detection card is included, described detection card includes backing (0), and the following knot for proximally arriving distal end on the backing Structure：Sample pad (1), gold standard pad (2), nitrocellulose filter (8), detection zone, quality control region (6) and absorption pad (7)；

And described gold standard pad (2) includes：First antibody load region, secondary antibody load region and the load of the 3rd antibody Area, wherein, described first antibody is directed to the antibody of gentamicin for the specificity of colloid gold label, and described secondary antibody is The specificity of colloid gold label is directed to the antibody of chloramphenicol, and the 3rd described antibody is directed to ring third for the specificity of colloid gold label The antibody of xacin-series antibiotic；

And the detection zone includes：First detection zone (3), the second detection zone (4) and the 3rd detection zone (5), wherein, institute The first detection zone (3) stated is coated with the comlete antigen of gentamicin, and described the second detection zone (4) is coated with the complete of chloramphenicol Holoantigen, the 3rd described detection zone (5) are coated with the comlete antigen of Ciprofloxacin class antibiotic.

In another preference, described Ciprofloxacin class antibiotic is selected from the group：Enrofloxacin, Norfloxacin, ring third Sha Xing, Ofloxacin, Danofloxacin, quinoline fluorine first or its combination.

In another preference, the comlete antigen of described gentamicin is the conjugate of gentamicin and carrier protein.

In another preference, the comlete antigen of described chloramphenicol is the conjugate of chloramphenicol and carrier protein.

In another preference, the comlete antigen of described Ciprofloxacin class antibiotic is Ciprofloxacin class antibiotic and load The conjugate of body protein.

In another preference, the carrier protein is selected from the group：BSA, OVA or its combination.

In another preference, described backing (0) is PVC board.

In another preference, the sample pad (1) is glass fibre.

In another preference, the absorption pad (7) is blotting paper.

In another preference, described sample pad (1), gold standard pad (2), nitrocellulose filter (8) and absorption pad (7) It is pasted on the backing.

In another preference, described sample pad (1) and gold standard pad (2) partly overlap.

In another preference, described detection zone is positioned close to the side of gold standard pad (2), and described quality control region (6) it is positioned close to the side of absorption pad (7).

In another preference, the effluent piece also includes cartridge (9), and the well (10) in the cartridge With observation window (11).

In another preference, described detection card is completely set up in cartridge (9), and the well (10) corresponds to institute The sample pad (1) on detection card is stated, and the observation window (11) corresponds to detection zone and the quality control region that the detection blocks.

In another preference, the length of the cartridge is 80-90.0mm, width 10-20mm, and height is 4-5mm.

In another preference, the length of the effluent piece is 60-70mm, and width is 3-4mm.

In another preference, the quality control region (6) includes the 4th antibody, and the 4th antibody specificity is incorporated into described First antibody, secondary antibody and the 3rd antibody.

In another preference, described the first detection zone (3), the second detection zone (4), the 3rd detection zone (5) and Quality Control Area (6) is located on nitrocellulose filter (8).

In another preference, the effluent piece is used to detect the antibiotic residue in food.

In another preference, the food includes livestock and poultry, aquatic products, egg, milk, feed and honey.

In second aspect of the present utility model, there is provided a kind of kit for being used to detect antibiotic residue, the reagent Box includes：

(i) container；And

(ii) the effluent piece of the detection antibiotic residue as described in the utility model first aspect.

In another preference, the kit also includes specification.

It should be understood that in the scope of the utility model, above-mentioned each technical characteristic of the present utility model and below (such as implementation Example) in specifically describe each technical characteristic between can be combined with each other, so as to form new or preferable technical scheme.It is limited to Length, no longer tire out one by one state herein.

Brief description of the drawings

Fig. 1 is a kind of structure sectional view of the detection card of preference of the utility model.Wherein, 1 is sample pad, and 2 be gold mark Pad, 3 be the first detection zone, and 4 be the second detection zone, and 5 be the 3rd detection zone, and 6 be quality control region, and 7 be absorption pad, and 8 be cellulose nitrate Plain film, 0 is backing.

Fig. 2 is a kind of top view of the effluent piece of the detection antibiotic residue of preference of the utility model.Wherein, 9 be card Box, 10 be well, and 11 be observation window.

Embodiment

The present inventor by depth studying extensively, it has unexpectedly been found that a kind of side for detecting antibiotic residue in food Flow.Specifically, according to detection when develop the color position difference, the effluent piece can simultaneously quick detection Multiple Classes of Antibiotics, including but Gentamicin, chloramphenicol and Ciprofloxacin class antibiotic are not limited to, changes the previous reagent of mesh and only detects a kind of present situation of composition. On this basis, the utility model is completed.

Antibiotic

Antibiotic (antibiotic) is in life by microorganism (including bacterium, fungi, actinomyces) or high animals and plants There is antipathogen or other active a kind of secondary metabolites caused by during work, other living cells can be disturbed to send out Educate the chemical substance of function.

As used herein, described " antibiotic to be measured " refers to the antibiotic of lateral flow strip detection of the present utility model, specifically Including gentamicin, chloramphenicol and Ciprofloxacin class antibiotic.

Detection method and operation principle

For the ease of understanding the utility model, the Cleaning Principle of the utility model effluent piece is provided.It should be understood that this practicality is new The protection domain of type is not influenceed or limitation by the principle.

The utility model use competition law immunochromatography principle, by the comlete antigen (the first compound) of gentamicin, The comlete antigen (the second compound) of chloramphenicol and the comlete antigen (triplex thing) of Ciprofloxacin class antibiotic are solid respectively Due to the first detection zone on nitrocellulose membrane, the second detection zone and the 3rd detection zone (solid phase antigen), by colloid gold label For the antibody of chloramphenicol, (second is anti-for the specificity of the antibody (first antibody) of gentamicin, colloid gold label for specificity Body) and the specificity of colloid gold label be fixed on gold standard pad for the antibody (the 3rd antibody) of Ciprofloxacin class antibiotic, and Formed by Fig. 1 in detecting strip and being loaded.After sample to be checked is added in the sample pad of detection card one end by well, pass through Capillarity moves forward, and dissolving combines first antibody, secondary antibody and the 3rd antibody of the colloid gold label in gold standard pad, then The first detection zone, the second detection zone, the 3rd detection zone, quality control region are moved to successively.If not containing antibiotic to be measured in sample, First that first antibody, secondary antibody and the 3rd antibody of colloid gold label can be fixed on nitrocellulose filter respectively is compound Thing, the second compound and the capture of triplex thing, so as to form red in the first detection zone, the second detection zone, the 3rd detection zone Band.If containing finite concentration certain antibiotic to be measured in sample, such as contain gentamicin, colloid gold label in gold standard pad First antibody can be combined first after being dissolved with gentamicin in sample, so as to suppress on first antibody and nitrocellulose filter The combination of first compound, the band color of the first detection zone will weaken or disappear；Secondary antibody and the second compound It is unaffected with reference to the combination of, the 3rd antibody and triplex thing, the second detection zone and the 3rd detection zone still form red Band.As contained two or more antibiotic to be measured in sample simultaneously, such as contain gentamicin, chloramphenicol and Ciprofloxacin simultaneously Class antibiotic, first antibody, secondary antibody and the 3rd antibody of colloid gold label and the first compound on nitrocellulose filter, The combination of second compound and triplex thing can be suppressed, the first detection zone, the second detection zone, article of the 3rd detection zone Band color can weaken or disappear.In other words, when containing certain antibiotic in sample to be checked, corresponding antibody and inspection The combination for surveying region is affected, and the band color of corresponding detection zone can weaken or disappear.

The utility model is provided with the 4th antibody in the quality control region of nitrocellulose filter, and the 4th antibody specificity combines In the first antibody, secondary antibody and the 3rd antibody, no matter whether contain antibiotic to be measured, colloid gold label in measuring samples First antibody, secondary antibody and the 3rd antibody can form red stripes with the 4th antibody binding of quality control region, the band be The standard that whether chromatography process normal and whether detection plate fails judged, while also serves as the meter of control difference between batch in quantitative analysis Calculate index.

Sensitivity

Effluent piece sensitivity of the present utility model is as follows,

The detection thresholding of gentamicin：5ug/l

The detection thresholding of chloramphenicol：0.3ug/l

The thresholding of Ciprofloxacin class is as follows：

The manufacture of effluent piece

In the utility model, the existing material system in this area can be selected in each element (or component) of the effluent piece Into.

Backing 0 can be made of any stabilization, non-porous material, and its intensity should be enough supporting material and adhere thereto Each element.Because many measure are by the use of water as dispersive medium, therefore backing 0 is preferably substantially water-impervious.One In individual preference, backing 0 is made of polymer film, is used made of polychloroethylene film (such as PVC offset plates).

Sample pad 1 can be made of any absorbent material.Workable example of material includes：Cellulose, nitrocellulose, Cellulose acetate, glass fibre, nylon, polyelectrolyte ion exchange membrane, propylene copolymer/nylon and polyether sulfone.

Absorption pad 7 can be made of any material that can be absorbed as sample and the liquid of buffer solution.The absorption of absorption pad 7 Ability is sufficiently large, to absorb the liquid for being added to test-strips.Suitable for absorption pad 7 material example include cellulose and Absorbent filter.

Antibody

First antibody, secondary antibody and the 3rd antibody are the antibody of colloid gold label, can respectively with gentamicin, chlorine Mycin, Ciprofloxacin class antibiotic combine.

4th antibody is sheep anti-mouse igg in combination with first antibody, secondary antibody and the 3rd antibody, preferable 4th antibody It is more anti-.

Antibody used in the utility model is commercially available.

Colloid gold label

Collaurum is to be acted on by gold chloride (HAuCl4) in reducing agent such as white phosphorus, ascorbic acid, sodium citrate, tannic acid etc. Under, a certain size gold grain is can be grouped to, and because electrostatic interaction turns into a kind of colloidal state of stabilization, formed electronegative Hydrophobic sol solution, turn into stable colloidal state due to electrostatic interaction, therefore claim collaurum.

Collaurum is negatively charged under mild alkaline conditions, can form firm combination with the positive charge group of protein molecule, Because this combination is electrostatical binding, so not influenceing the biological nature of protein.Collaurum in addition to being combined with protein, It can also be combined with many other large biological molecules, such as SPA, PHA, ConA.It is such as high according to some physical behaviors of collaurum Electron density, granular size, shape and color reaction, plus the immune and biological characteristics of conjugate, thus make collaurum wide It is applied to the fields such as immunology, histology, pathology and cell biology generally.

The macromolecules such as colloid gold label, substantially protein are adsorbed to the coating process on colloid gold particle surface.Inhale Random reason is probably colloid gold particle surface negative charge, and firm knot is formed because of Electrostatic Absorption with the positive charge group of protein Close.The colloid gold particle of various different-grain diameters, namely different colours can be easily prepared from gold chloride with reducing process.It is this Spherical particle has very strong adsorption function to protein, can be with staphylococcal protein A, immunoglobulin, toxin, sugared egg In vain, the Non-covalent binding such as enzyme, antibiotic, hormone, bovine serum albumin(BSA), polypeptide, thus in basic research and clinical trial As highly useful instrument.

Immuno-gold labeling technology (Immunogold labell ing technique) mainly make use of gold grain to have height The characteristic of electron density, marked in gold at protein binding, under the microscope visible dark brown coloured particles, when these labels are corresponding When largely assembling at part, naked eyes red color visible or pink spot, thus detected for qualitative or sxemiquantitative tachysynthesis In method, this reaction can also be exaggerated by the deposition of Argent grain, referred to as immunogold silver staining.

In the preparation of the utility model lateral flow strip, it is preferable that 40nm collaurums are taken, with 0.1M K₂CO₃PH is adjusted, with every milli Rising the μ g antibody of collaurum 5 to be marked, must be precipitated after marking fluid centrifugation, precipitation 10mM pH7.2PBS dissolve, and in 650nm Lower measure light absorption value OD, apply on paving polyester material and dry with 1-3OD, as the gold standard pad in the utility model detection card.

The preparation of lateral flow strip

Each element (or component) of the utility model effluent piece is using technical method manufacture generally in the art and group Dress.

Preferably, the first compound, the second compound, triplex thing and Quality Control antibody are diluted with coating buffer solution, will Four kinds of capture liquid after dilution are equably coated on the nitrocellulose membrane as detection part respectively, and four kinds of capture liquid penetrate into The first detection zone, the second detection zone, the 3rd detection zone and quality control region are formed after nitrocellulose filter respectively.

Sample pad, gold standard pad, nitrocellulose filter, absorption pad are pasted on backing by adhesive respectively.With slitting Machine-cut is placed in cartridge, well alignment detection card sample pad location into 4mm detection card, detection reagent is assembled into after compression Box, add drier foil sealing packaging and preserve.

The advantages of the utility model：

The effluent piece of detection antibiotic residue described in the utility model overcomes and needs to detect difference one by one in existing method The drawbacks of species antibiotic, by same lateral flow strip set three detection zones, quickly, efficiently and accurately specific detection it is more Kind antibiotic.

Below in conjunction with specific embodiment, the utility model is further illustrated.It should be understood that following description is only this practicality New most preferred embodiment, and it is not construed as the limitation for scope of protection of the utility model.Fully understanding On the basis of the utility model, generally according to normal condition, or according to the condition proposed by manufacturer, those skilled in the art Nonessential change can be made to the technical solution of the utility model, such change should be considered as being included in this practicality newly Among the protection domain of type.

Embodiment 1

The structure of effluent piece

The effluent piece (or test-strips) of detection antibiotic residue of the present utility model includes cartridge and the inspection in cartridge Survey card.

A kind of structure of preferable detection card is as shown in figure 1, it includes backing 0, and on backing：Sample pad 1, Gold standard pad 2, nitrocellulose filter 8, detection zone (or detection line), including the first detection zone 3 and the detection of the second detection zone the 4, the 3rd Area 5, quality control region 6 (or check plot, control line, nature controlling line) and absorption pad 7.

A kind of structure of preferable cartridge 9 as shown in Fig. 2 include well 10 and observation window 11 thereon.It is also, described Detection card is completely set up in cartridge 9, the sample pad 1 that the well 10 corresponds on the detection card, and the observation window 11 the first detection zone 3, the second detection zone 4, the 3rd detection zone 5 and the quality control regions 6 corresponded on the detection card

Specifically, effluent piece of the present utility model has the characteristics that：

The length of backing 0 is identical with effluent piece.

Sample pad 1 is located at one end of test-strips, and absorption pad 7 is located at the other end of test-strips.

Three kinds of antibody are loaded with gold standard pad 2, first antibody is directed to the anti-of gentamicin for the specificity of colloid gold label Body, secondary antibody are directed to the antibody of chloramphenicol for the specificity of colloid gold label, and the 3rd antibody is the specificity of colloid gold label For the antibody of Ciprofloxacin class antibiotic, above-mentioned antibody is commercially available.

Detection zone (also referred to as detection line) is between sample pad 1 and absorption pad 7, including the first detection zone 3, the second detection zone 4 and the 3rd detection zone 5, it is preferable that the first detection zone 3 is located at close to one end of sample pad 1, and usual detection zone is arranged on nitric acid fibre Tie up on plain film 8, pass through the gold standard pad 2 and adsorptive pads 7 of the nitrocellulose filter linkage flag.Preferably, the cellulose nitrate Quality control region 6 (also referred to as nature controlling line) is additionally provided with plain film 8, quality control region 6 is between detection zone and absorption pad 7.

Wherein, the first described detection zone 3 is coated with the comlete antigen of gentamicin；The second described detection zone 4 is coated with There is the comlete antigen of chloramphenicol, the 3rd described detection zone 5 is coated with the comlete antigen of Ciprofloxacin class antibiotic.Quality control region 6 The 4th antibody is coated with, the 4th antibody specificity is incorporated into described first antibody, secondary antibody and the 3rd antibody.

Embodiment 2

The use of effluent piece

1. acquisition testing sample, the present embodiment is using milk as detection sample；

2. detection card is kept flat, sample solution to be checked is drawn with dropper, vertical dropwise addition 3 is dripped in well, opened after sample-adding Beginning timing.

3. read testing result in 5 minutes.

As a result judge：

A：First detection zone, the second detection zone, the 3rd detection zone and quality control region change colour (red) simultaneously, show in sample not It is less than minimum detected value containing antibiotic to be measured or its concentration, testing result is feminine gender.

B:Quality control region changes colour (red), and the first detection zone, the second detection zone and the 3rd detection zone are non-discolouring, show sample In contain gentamicin, chloramphenicol and Ciprofloxacin class antibiotic simultaneously, testing result is the positive.

C：Quality control region and some or two detection zone discolorations (red), and other detection zones are non-discolouring, show that sample contains There is the antibiotic corresponding with non-discolouring detection zone, testing result is the positive.

D：Quality control region is non-discolouring, and no matter whether detection zone changes colour, and shows that this detection is invalid.

All it is incorporated as referring in this application in all documents that the utility model refers to, just as each document quilt It is individually recited as with reference to such.In addition, it is to be understood that after above-mentioned instruction content of the present utility model has been read, this area skill Art personnel can make various changes or modifications to the utility model, and these equivalent form of values equally fall within the application appended claims Book limited range.

Claims (10)

1. a kind of effluent piece for detecting antibiotic residue, it is characterised in that the effluent piece includes a detection and blocked, described detection Card includes backing (0), and the following structure for proximally arriving distal end on the backing：Sample pad (1), gold standard pad (2), Nitrocellulose filter (8), detection zone, quality control region (6) and absorption pad (7)；

And described gold standard pad (2) includes：First antibody load region, secondary antibody load region and the 3rd antibody load region, its In, described first antibody is directed to the antibody of gentamicin for the specificity of colloid gold label, and described secondary antibody is colloid The specificity of gold mark is directed to the antibody of chloramphenicol, and the 3rd described antibody is directed to Ciprofloxacin for the specificity of colloid gold label The antibody of class antibiotic；

And the detection zone includes：First detection zone (3), the second detection zone (4) and the 3rd detection zone (5), wherein, it is described First detection zone (3) is coated with the comlete antigen of gentamicin, and described the second detection zone (4) is coated with the completely anti-of chloramphenicol Original, the 3rd described detection zone (5) are coated with the comlete antigen of Ciprofloxacin class antibiotic.

2. effluent piece as claimed in claim 1, it is characterised in that described detection zone is positioned close to the one of gold standard pad (2) Side, and described quality control region (6) is positioned close to the side of absorption pad (7).

3. effluent piece as claimed in claim 1, it is characterised in that the effluent piece also includes cartridge (9), and positioned at described Well (10) and observation window (11) in cartridge.

4. effluent piece as claimed in claim 3, it is characterised in that described detection card is completely set up in cartridge (9), described The sample pad (1) that well (10) corresponds on the detection card, and the observation window (11) corresponds on the detection card Detection zone and quality control region (6).

5. effluent piece as claimed in claim 4, it is characterised in that the length of the cartridge is 80-90.0mm, width 10- 20mm, and height is 4-5mm.

6. effluent piece as claimed in claim 1, it is characterised in that the length of the effluent piece is 60-70mm, and width is 3- 4mm。

7. effluent piece as claimed in claim 1, it is characterised in that the quality control region (6) includes the 4th antibody, and the described 4th is anti- Body specifically binds to the first antibody, secondary antibody and the 3rd antibody.

8. effluent piece as claimed in claim 1, it is characterised in that described the first detection zone (3), the second detection zone (4), Three detection zones (5) and quality control region (6) are located on nitrocellulose filter (8).

9. a kind of kit for being used to detect antibiotic residue, it is characterised in that the kit includes：

(i) container；And

(ii) the effluent piece of the detection antibiotic residue as described in claim 1-8 is any.

10. kit as claimed in claim 9, it is characterised in that the kit also includes specification.