CN105784994A - Test paper for detecting imidacloprid residues in crops and application and preparing method thereof - Google Patents
Test paper for detecting imidacloprid residues in crops and application and preparing method thereof Download PDFInfo
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Abstract
The invention discloses test paper for detecting imidacloprid residues in crops and an application and preparing method thereof.The test paper comprises a sample absorption mat, a combination releasing mat, a reaction film, a water absorption mat and a bottom plate.The reaction film is provided with a detection line (T line) coated with imidacloprid coupling antigens and a quality control line (C line) coated with goat-rat antiantibodies, and the combination releasing mat is coated with an imidacloprid monoclonal-colloidal gold marker.The test paper has the advantages of being high in sensitivity and specificity, low in cost, easy to operate, short in detection time, wide in application range, simple in storage and long in service life; the test paper is an ideal rapid screening means, the rapid site detection requirement can be better met, and good use and popularization prospects are achieved.
Description
Technical field
The present invention relates to a kind of test paper detecting Determination of Imidacloprid Residue in crops and application, preparation method, belong to imidacloprid detection technique field.
Background technology
Imidacloprid (Imidacloprid), also known as imidacloprid, aphid lice only, is a new generation's chloro nicotine insecticide, there is wide spectrum, efficient, low toxicity, low-residual, insect is not likely to produce the resistance to the action of a drug, to features such as people, animal, plant and natural enemies securities, and have tag, stomach toxicity and the multiple drug effect of interior suction.After contacting pests medicament, nervous centralis normal conduction is obstructed so that it is paralysis death.Quick-acting is good, within after medicine 1 day, i.e. has higher preventive effect, and residual life is up to about 25 days.In actual production, imidacloprid is of many uses, is often used to prevent and treat cigarette aphid.
Owing in crops, human body even can be worked the mischief by Residual imidacloprid to having a strong impact on product quality, it is necessary therefore the residues detection of imidacloprid in crops just to be seemed.In terms of prior art and coherent detection standard, detection method currently for Determination of Imidacloprid Residue is mainly instrumental method, most common method is LC-UV, LC-MS and LC-MS/MS, instrumental method possesses the advantages such as detection sensitivity height, high specificity, but detection Sample pretreatment is loaded down with trivial details, time-consuming, sample also needs to extract and purified treatment, and instrument detection method needs expensive large-scale instrument and equipment simultaneously, it is equipped with the detection technique personnel of specialty, so limiting its application；Utilize detection kit prepared by immunological technique, in Determination of Imidacloprid Residue detects, play important function, but the use of general detection kit, at least need reaction and the operating time of 1 hour, testing result could be obtained, therefore, seek the most quick detection means, have important practical significance.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of test paper detecting Determination of Imidacloprid Residue in crops and application, preparation method, there is easy and simple to handle, highly sensitive, low cost, easy to make, the advantages such as the detection time is short, can overcome the deficiencies in the prior art.
The technical scheme is that and a kind of detect the test paper of Determination of Imidacloprid Residue in crops, including sample absorption pad, bond release pad, reaction film, adsorptive pads and base plate, having the detection line (T line) being coated with imidacloprid coupled antigen and the nature controlling line (C line) being coated with sheep anti mouse antiantibody on described reaction film, described bond release pad is coated with imidacloprid monoclonal-colloid gold label thing.
Described imidacloprid coupled antigen is to be obtained with carrier protein couplet by imidacloprid haptens, and described carrier protein can be bovine serum albumin(BSA), ovalbumin, hemocyanin, thyroprotein or human serum albumins.
Described imidacloprid monoclonal antibody-colloid gold label thing is to add imidacloprid monoclonal antibody in collaurum to obtain, and wherein said collaurum is to be reacted to produce by trisodium citrate and gold chloride to obtain.
Described imidacloprid monoclonal antibody is with imidacloprid hapten-carrier protein conjugate immune mouse, then mouse boosting cell and myeloma cell is obtained by merging, screening.
Described imidacloprid haptens is to be reacted with mercaptopropionic acid by imidacloprid to obtain, and its molecular structural formula is:
。
Described sample absorption pad, bond release pad, reaction film, adsorptive pads are pasted onto on base plate successively, and wherein said bond release pad 1/3-1/2 is capped under sample absorption pad.
The present invention also provides for a kind of method preparing above-mentioned test paper, and it comprises the following steps:
1) preparation is coated with the bond release pad of imidacloprid monoclonal antibody-colloid gold label thing；
2) preparation has the reaction film of detection line and the nature controlling line being coated with sheep anti mouse antiantibody being coated with imidacloprid coupled antigen；
3) by 1) and 2) the bond release pad for preparing, reaction film be assembled into described test paper with sample absorption pad, adsorptive pads and base plate.
Specifically, step includes:
1) prepared by haptens: be dissolved in anhydrous tetrahydro furan by imidacloprid, is slowly added to 3-mercaptopropionic acid, adds potassium hydroxide solid, is heated to reflux.With thin-layer chromatography monitoring reaction, till without product, through nuclear-magnetism, infrared and Mass Spectrometric Identification, the success of imidacloprid hapten synthesis.In the reaction, imidacloprid is 1:1.5 with the mol ratio of mercaptopropionic acid.
2) by imidacloprid haptens and carrier protein couplet, imidacloprid hapten-carrier protein conjugate, i.e. imidacloprid coupled antigen are obtained；
3) with imidacloprid hapten-carrier protein conjugate immune mouse, pass through to merge, screen by mouse boosting cell and myeloma cell, obtain imidacloprid monoclonal antibody；
4) extract mouse IgG immune health goat, obtain sheep anti mouse antiantibody；
5) collaurum is prepared with trisodium citrate and gold chloride reaction；
6) imidacloprid monoclonal antibody step 3) prepared adds in collaurum prepared by step 5), obtains imidacloprid monoclonal antibody-colloid gold label thing；
7) being coated in bond release pad by imidacloprid monoclonal antibody-colloid gold label thing, 37 DEG C are dried taking-up after 60min, are sealed and placed in dry environment saving backup；
8) imidacloprid hapten-carrier protein conjugate is coated on reaction film composition detection line (T line), and sheep anti mouse antiantibody is coated on reaction film composition nature controlling line (C line)；
9) by sample absorption pad be 7.2 containing 0.5% bovine serum albumin(BSA) (volumn concentration), pH, 0.1mol/L phosphate buffer soak 2h, dry 2h at 37 DEG C；
10) pasting reaction film, adsorptive pads, sample absorption pad, bond release pad on base plate in order, sample absorption pad covers bond release pad, is finally cut into the wide little bar of 3mm, adds plastic casing, pack, can preserve 12 months under the conditions of 4-30 DEG C.
The present invention additionally also provides for a kind of applying the method for Determination of Imidacloprid Residue in above-mentioned detection paper crops, and it includes step:
(1) sample pre-treatments；
(2) detect with described test paper；
(3) testing result is analyzed.
The invention has the beneficial effects as follows:
The imidacloprid quick detection test paper of the present invention uses the antibody of high degree of specificity, antigen-reactive and immunochromatographiassays assays technology, imidacloprid monoclonal antibody-colloid gold label thing is fixed in bond release pad, imidacloprid in sample is in flow process, first with the imidacloprid monoclonal antibody-colloid gold label thing in bond release pad, form drug-antibody-colloid gold label thing.Imidacloprid hapten-carrier protein conjugate competition binding imidacloprid monoclonal antibody-colloid gold label thing on medicine in sample and reaction film detection line, according to detection line red stripes with or without or shade judge Determination of Imidacloprid Residue amount in analyte sample fluid.Testing through inventor, test paper of the present invention is limited to 3mg/kg to the detection of fresh tobacco leaves, and the detection of dry tobacco leaf is limited to 5mg/kg.
During detection, sample instills in test paper hole clipping after treatment, when imidacloprid concentration in the sample limits less than detection or is zero, imidacloprid monoclonal antibody-colloid gold label thing can be combined with the imidacloprid hapten-carrier protein conjugate being fixed on reaction film in chromatography process, and each in detection line (T line) and nature controlling line (C line) red stripes occur；If the concentration that imidacloprid is in the sample is equal to or higher than detection limit, imidacloprid monoclonal antibody-colloid gold label thing all can be combined with imidacloprid, thus because competitive reaction will not be combined with imidacloprid hapten-carrier protein conjugate and occur without red stripes at T line.As shown in Figure 3.
Negative: when nature controlling line (C line) demonstrates that red stripes, detection line (T line) also show that red stripes, be judged to feminine gender simultaneously.
Positive: when nature controlling line (C line) demonstrates red stripes, and to detect line (T line) and do not develop the color, be judged to the positive.
Invalid: when nature controlling line (C line) does not demonstrate red stripes, the most no matter detecting whether line (T line) demonstrates red stripes, it is invalid that this test paper is judged to.
The test paper of the present invention has highly sensitive, high specificity, low cost, simple to operate, the detection time is short, is suitable for various units uses, stores simple, the advantage of long shelf-life, it is the quickest screening means, it is possible to preferably meet the requirement of field quick detection., low cost easy, quick, directly perceived, accurate, applied widely by the method for detection paper Determination of Imidacloprid Residue of the present invention, easily promote the use of, be particularly suitable for the qualitative and half-quantitative detection of Determination of Imidacloprid Residue in tobacco.
Accompanying drawing explanation
Fig. 1: imidacloprid hapten synthesis route map；
Fig. 2: test paper cross-sectional view；
Fig. 3: detection paper result process decision chart.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
The preparation of embodiment 1 imidacloprid Test paper
The preparation method of this test paper mainly includes following step:
1) preparation is coated with the bond release pad of imidacloprid monoclonal antibody-colloid gold label thing；
2) preparation has the reaction film of detection line and the nature controlling line being coated with sheep anti mouse antiantibody being coated with imidacloprid coupled antigen；
3) by 1) and 2) the bond release pad for preparing, reaction film be assembled into test paper with sample absorption pad, adsorptive pads and PVC base plate.
Substep narration in detail below:
1, the haptenic preparation of imidacloprid
Imidacloprid is dissolved in anhydrous tetrahydro furan, is slowly added to 3-mercaptopropionic acid, add potassium hydroxide solid, be heated to reflux.With the time row of thin-layer chromatography monitoring reaction, till without product, through nuclear-magnetism, infrared and Mass Spectrometric Identification, the success of imidacloprid hapten synthesis.In the reaction, imidacloprid is 1:1.5 with the mol ratio of mercaptopropionic acid.Concrete reaction equation is as shown in Figure 1.
2, prepared by immunogene
Imidacloprid haptens and bovine serum albumin(BSA) (BSA) coupling obtain immunogene.Method particularly includes: weigh 32.5mg haptens and be dissolved in 3mL DMF solution, be separately added into NHS/EDC mixed aqueous solution, activate 4 hours；(containing BSA 220mg) during solution is added separately to BSA solution after activation, adjusting pH 8.5, room temperature reaction 24 hours, forward to dialyse 3 days in PB solution in bag filter, every day changes liquid sooner or later, prepares antibody for animal immune after having dialysed.
3, the preparation method of imidacloprid monoclonal antibody
(1) animal immune
Immunogene step 2 obtained is injected in Balb/c Mice Body, and immunizing dose is 150 μ g/ so that it is produce antiserum.
(2) cell merges and cloning
After mice serum measurement result is higher, take its splenocyte, in 8:1(quantitative proportion) ratio and SP2/0 myeloma cell fusion, use indirect competitive ELISA to measure cell supernatant, the positive hole of screening.Utilize limiting dilution assay that positive hole is carried out cloning, until obtaining secreting the hybridoma cell strain of imidacloprid monoclonal antibody.
Cell cryopreservation and recovery: monoclonal hybridoma strain frozen stock solution is made 1 × 106The cell suspension of individual/ml, preserves in liquid nitrogen for a long time.Take out cryopreservation tube during recovery, be immediately placed in 37 DEG C of water-bath middling speeds and melt, after centrifugal segregation frozen stock solution, move into and cultivate culture in glassware.
The production of monoclonal antibody and purifying: Balb/c mouse peritoneal is injected sterilizing paraffin oil 0.5ml/ only, the monoclonal hybridoma strain 5 × 10 that pneumoretroperitoneum injection in 7 days is stable5Individual/only, gather ascites after 7 days.Carry out ascites by octanoic acid-saturated ammonium sulfate method to purify ,-20 DEG C of preservations.
(3) cell cryopreservation and recovery
Hybridoma frozen stock solution is made 1 × 106The cell suspension of individual/ml, preserves in liquid nitrogen for a long time.Take out cryopreservation tube during recovery, be immediately placed in 37 DEG C of water-bath middling speeds and melt, after centrifugal segregation frozen stock solution, move into and cultivate culture in glassware.
(4) preparation of monoclonal antibody and purifying
Increment cultivation: be placed in cell culture medium by hybridoma, cultivates under the conditions of 37 DEG C, is purified by the nutrient solution obtained by octanoic acid-saturated ammonium sulfate method, obtains monoclonal antibody ,-20 DEG C of preservations.
Described cell culture medium is to add calf serum and sodium acid carbonate in RPMI1640 culture medium, make the calf serum final concentration of 20%(weight/mass percentage composition in cell culture medium), make the sodium acid carbonate final concentration of 0.2%(weight/mass percentage composition in cell culture medium)；The pH of described cell culture medium is 7.4.
5, the preparation of sheep anti mouse antiantibody
Using sheep as immune animal, for immunogene, pathogen-free domestic sheep is carried out immunity with mouse source antibody, obtain sheep anti mouse antiantibody.
6, the preparation of monoclonal antibody-colloid gold label thing
(1) preparation of collaurum
By double distilled deionized water, 1% gold chloride is diluted to 0.01%(weight/mass percentage composition), take 100ml to be placed in conical flask, it is heated to boiling with thermostatic electromagnetic agitator, at continuous high temperature, continuously stirred lower addition 2.5ml 1% trisodium citrate, continue at the uniform velocity to be heated with stirring to solution be bright red time stop, original volume is returned to by deionized water, 4 DEG C of preservations after being cooled to room temperature.The collaurum outward appearance prepared is pure, bright, without precipitation and floating thing.
(2) preparation of gold labeling antibody
Under magnetic stirring, adjust the pH value of collaurum to 7.0 with 0.2mol/L solution of potassium carbonate, in colloidal gold solution, imidacloprid antibody is added by the standard adding 20-50 μ g antibody in every milliliter of colloidal gold solution, continue to stir and evenly mix 30min, add 10%BSA, make its final concentration of 1%(volumn concentration in colloidal gold solution), stand 10min.12000r/min, 4 DEG C of centrifugal 40min, abandon supernatant, and precipitation, with redissolving buffer solution twice, will precipitate resuspended with the redissolution buffer solution that volume is initial colloid gold volume 1/10, put 4 DEG C standby.
Described redissolution buffer solution: containing bovine serum albumin(BSA) (BSA) 0.1%-0.3%(volumn concentration), Tween-80 0.05%-0.2%(weight/mass percentage composition), pH
The 0.02mol/L phosphate buffer of 7.2.
7, the preparation of bond release pad
Bond release pad being soaked in containing bovine serum albumin(BSA) (bovine serum albumin(BSA) concentration in buffer solution is 0.5%) and pH 7.2, in 0.5mol/L phosphate buffer, uniformly soak 1h, 37 DEG C of baking 3h are standby.ZX1000 type spray film instrument is produced with hundred road companies, the imidacloprid prepared monoclonal antibody-colloid gold label thing is uniformly coated in bond release pad, after every 1cm bond release pad is coated 0.01ml imidacloprid monoclonal antibody-colloid gold label thing, being placed in 37 DEG C of environment and take out after (humidity ＜ 20%) 60min, sealing is placed in dry environment (humidity ＜ 20%) and saves backup.
8, the preparation of reaction film
Imidacloprid haptens-bovine serum albumin conjugate is coated on reaction film composition detection line (T line), sheep anti mouse antiantibody is coated on reaction film composition nature controlling line (C line).
Being coated process: with phosphate buffer, imidacloprid haptens-bovine serum albumin conjugate is diluted to 10mg/ml, produce ZX1000 type point film instrument with hundred road companies, the detection line being coated on nitrocellulose filter (T line), package amount is 1.0ug/cm；With the phosphate buffer of 0.01mol/L, pH7.4, anti-for rabbit goat-anti antibody being diluted to 200ug/ml, with a nature controlling line that film instrument is coated on nitrocellulose filter (C line), package amount is 1.0ug/cm.2h it is dried under the conditions of the reaction film being coated is placed in 37 DEG C, standby.
9, the preparation of sample absorption pad
Sample absorption pad is placed in containing 0.5% bovine serum albumin(BSA) (volumn concentration), pH
Soaking 2h in 7.2 0.1mol/L phosphate buffers, 37 DEG C of baking 2h are standby.
10, the assembling of test paper
Sample absorption pad 1, bond release pad 2, reaction film 3, adsorptive pads 4 are pasted onto on PVC base plate 7 the most in order；Bond release pad 2 has 1/3 region to be absorbed by the sample pad 1 covering from initiating terminal, the end of bond release pad 2 is connected with the top of reaction film 3, the end of reaction film 3 is connected with the top of adsorptive pads 4, the top of sample absorption pad 1 aligns with the top of PVC base plate 7, and the end of adsorptive pads 4 aligns with the end of PVC base plate 7；Have detection line 5 and nature controlling line 6 on described reaction film 3, detect line 5(T line) and nature controlling line 6(C line) it is the strip tape perpendicular with the length of described test paper；Detection line 5 is located close to the side of the end of bond release pad 2；Nature controlling line 6 is located remotely from the side of the end of bond release pad 2；Test paper machine is cut into the wide little bar of 3mm, is contained in special plastics fabrication, form test card (as shown in Figure 2), can preserve 12 months under the conditions of 4-30 DEG C.
In the present invention, the material that base plate may select PVC base plate or other hard do not absorb water；Sample absorption pad may select glass, non-woven fabrics, hemofiltration film etc.；Adsorptive pads may select blotting paper；Reaction film may select nitrocellulose filter or CAM；The diaphragm of test paper may select PE material diaphragm.
The detection of Determination of Imidacloprid Residue in sample in embodiment 2 fresh tobacco leaves
1, the pre-treatment of sample
(1) before detection, fresh tobacco leaves sample is shredded into the fragment less than 1cm；
(2) weigh the sample that 1.0 ± 0.05g shreds, put into 5ml methyl alcohol and be all saturated with to liquid level；
(3) closeing the lid, vibrate 1min；
(4) pipette 0.1ml supernatant after standing and join mixing in 900ul 0.1M PBS.
2, detect with test paper
Vertically dripping 2-3 with suction pipe absorption measuring samples solution to drip in well, start timing, react 5min, it is determined that result during liquid flowing, it is invalid that other times judge.
3, testing result is analyzed
Negative (-): T line and C line all develop the color, represents that in sample, imidacloprid drug concentration is less than detection limit, such as Fig. 3 (a).
Positive (+): T line, without colour developing C line colour developing, represents that in sample, imidacloprid drug concentration is equal to or higher than detection limit, such as Fig. 3 (b).
Invalid: C line does not occurs, show the deterioration failure of incorrect operating process or test paper, such as Fig. 3 (c).In the case, should again read over specification, and retest with new test card.
The detection of Determination of Imidacloprid Residue in sample in embodiment 3 dry tobacco leaf
1, the pre-treatment of sample
(1) before detection, dry tobacco leaf sample is pulverized；
(2) weigh the sample that 0.5 ± 0.05g pulverizes, add 5ml methyl alcohol；
(3) closeing the lid, vibrate 1min；
(4) pipette 0.1ml supernatant after standing and join mixing in 900ul 0.1M PBS.
2, detect with test paper
Vertically dripping 2-3 with suction pipe absorption measuring samples solution to drip in well, start timing, react 5min, it is determined that result during liquid flowing, it is invalid that other times judge.
3, testing result is analyzed
Negative (-): T line and C line all develop the color, represents that in sample, imidacloprid drug concentration is less than detection limit, such as Fig. 3 (a).
Positive (+): T line, without colour developing C line colour developing, represents that in sample, imidacloprid drug concentration is equal to or higher than detection limit, such as Fig. 3 (b).
Invalid: C line does not occurs, show the deterioration failure of incorrect operating process or test paper, such as Fig. 3 (c).In the case, should again read over specification, and retest with new test card.
Embodiment 4 sample detection example
1, detection limit test
Take blank dry tobacco sample, add the most respectively imidacloprid to the most final concentration of 2,4,5,7.5,10mg/kg, take test paper and detect, each sample is repeated three times.
During tobacco sample dry by detection paper, be 2 when wherein imidacloprid adds concentration, 4mg/kg time, test paper demonstrates macroscopic two red lines, becomes feminine gender；Be 5 when wherein imidacloprid adds concentration, 7.5,10mg/kg time, test paper nature controlling line show, but detection line does not shows, becomes positive；Show this test paper in dry tobacco sample, the detection line of imidacloprid is 5mg/kg.
Take fresh tobacco sample, add the most respectively imidacloprid to the most final concentration of 1,2,3,6,9mg/kg, take test paper and detect, each sample is repeated three times.
During with detection paper fresh tobacco sample, be 1 when wherein imidacloprid adds concentration, 2mg/kg time, test paper demonstrates macroscopic two red lines, becomes feminine gender；Be 3 when wherein imidacloprid adds concentration, 6,9mg/kg time, test paper nature controlling line show, but detection line does not shows, becomes positive；Show this test paper in fresh tobacco, the detection line of imidacloprid is 3mg/kg.
2, false positive rate, false negative rate test
Take the known imidacloprid content dry tobacco positive sample 20 parts more than 5mg/kg and content less than 5mg/kg dry tobacco negative sample 20 parts；The known imidacloprid content fresh tobacco positive sample 20 parts more than 3mg/kg detects less than 3mg/kg fresh tobacco negative sample three batches of test paper of 20 parts of use with content, calculates its yin and yang attribute rate.The results are shown in Table 1, table 2.
Table 1 detects positive sample result
Table 2 detects negative sample result
Result shows: during the detection paper positive sample produced by 3 batches, result is all positive, it is known that positive sample coincidence rate is 100%, and false negative rate is 0；During 20 parts of negative sample of detection, result is all negative, it is known that negative match-rate is 100%.Illustrate that Determination of Imidacloprid Residue in tobacco can be used for quickly detecting by the test paper of the detection Determination of Imidacloprid Residue of the present invention.
3, specific test
Specific conventional cross reacting rate represents, refers to that the antibody antigenic determinant different from structure occurs the ability of combination.By the carbendazim often examined, Triadimenol, the sample of chrysanthemum esters medicine 100ug/L, detect with imidacloprid colloid gold test paper.Result shows, during with this detection paper carbendazim, Triadimenol, chrysanthemum esters medicine 100ug/L, test paper nature controlling line and detection line all develop the color, and present feminine gender, illustrate that this test paper is to these medicine no cross reactions.
Claims (8)
1. one kind is detected the test paper of Determination of Imidacloprid Residue in crops, including sample absorption pad (1), bond release pad (2), reaction film (3), adsorptive pads (4) and base plate (7), it is characterized in that: have the detection line (5) being coated with imidacloprid coupled antigen and the nature controlling line (6) being coated with sheep anti mouse antiantibody on described reaction film (3), described bond release pad (2) is coated with imidacloprid monoclonal-colloid gold label thing.
2. test paper as claimed in claim 1, it is characterized in that: described imidacloprid coupled antigen is to be obtained with carrier protein couplet by imidacloprid haptens, described carrier protein can be bovine serum albumin(BSA), ovalbumin, hemocyanin, thyroprotein or human serum albumins.
3. test paper as claimed in claim 1, it is characterised in that: described imidacloprid monoclonal antibody-colloid gold label thing is to add imidacloprid monoclonal antibody in collaurum to obtain, and wherein said collaurum is to be reacted to produce by trisodium citrate and gold chloride to obtain.
4. test paper as claimed in claim 3, it is characterised in that: described imidacloprid monoclonal antibody is with imidacloprid hapten-carrier protein conjugate immune mouse, then mouse boosting cell and myeloma cell is obtained by merging, screening.
5. the test paper as described in claim 2 or 4, it is characterised in that: described imidacloprid haptens is to be reacted with mercaptopropionic acid by imidacloprid to obtain, and its molecular structural formula is:
。
6. test paper as claimed in claim 1, it is characterized in that: described sample absorption pad (1), bond release pad (2), reaction film (3), adsorptive pads (4) are pasted onto on base plate (7) successively, wherein said bond release pad (2) 1/3-1/2 is capped under sample absorption pad (1).
7. preparing a method for test paper described in any one of claim 1-6, it comprises the following steps:
1) preparation is coated with the bond release pad (2) of imidacloprid monoclonal antibody-colloid gold label thing；
2) preparation has the reaction film of detection line and the nature controlling line being coated with sheep anti mouse antiantibody being coated with imidacloprid coupled antigen；
3) by 1) and 2) the bond release pad (2) for preparing, reaction film (3) be assembled into described test paper with sample absorption pad (1), adsorptive pads (4) and base plate (7).
8. the application of test paper as described in any one of claim 1-6, it includes step:
(1) sample pre-treatments；
(2) detect with described test paper；
(3) testing result is analyzed.
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| CN108982863A (en) * | 2018-08-29 | 2018-12-11 | 郑州工程技术学院 | A kind of immune chromatography test paper detecting imidacloprid |
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