CN102495215B - Kit for quantitatively detecting tumor necrosis factor alpha - Google Patents
Kit for quantitatively detecting tumor necrosis factor alpha Download PDFInfo
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- CN102495215B CN102495215B CN201110399728.2A CN201110399728A CN102495215B CN 102495215 B CN102495215 B CN 102495215B CN 201110399728 A CN201110399728 A CN 201110399728A CN 102495215 B CN102495215 B CN 102495215B
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Abstract
The invention discloses a diagnosis kit for quantitatively detecting a tumor necrosis factor (TNF) alpha, and a detection method thereof. The kit comprises a TNF-alpha magnetic separation reagent, an enzyme-labeled antibody, a reinforcer, a calibration substance, a control substance, a concentrated solution and a substrate. The kit combined with an immune magnetic particle separation technology and a competitive enzyme-linked immune technology has high detection sensitivity and specificity; furthermore, the detection time is shortened greatly; a plurality of biologic samples can be detected within 10 minutes; and samples, such as urine, serum and the like, can be directly detected without being pretreated.
Description
Technical field
The present invention relates to measure a kind of diagnostic kit and detection method thereof of quantitative detection tumor necrosis factor α.
Background technology
TNF, is called for short TNF, is a kind of small molecular protein of being secreted by macrophage.Tumor necrosis factor α (TNF-α) is mainly secreted by monokaryon one macrophage; TNF-β is mainly by the T lymphocytic emiocytosis activating, and both have similar pyrogenicity.Low dose is unimodal heat, and heavy dose is double quotidian fever; TNF all can stimulate the generation of IL-1 in vivo and in vitro.
The mankind's TNF-α gene is about 2.76kb, and mouse is 2.78kb, and structure is closely similar, by 4 extrons and 3 intrones, forms, closely chain with mhc gene group, is positioned respectively on the 6th pair and the 17th pair of chromosome.Within 1984, from the cells such as HL-60, U937, clone successful rHu TNF-α cDNA, and in Escherichia coli, obtain high expressed.HumanTNF-α's precursor is comprised of 233 amino acid residues, and containing the signal peptide of 76 amino acid residues, excision signal peptide after ripening type TNF-α is 157 amino acid residues, non-glycosylated, the 69th and 101 two halfcystines formation intramolecular disulfide bonds.RHu TNF-alpha molecule amount is 17kDa.Ripe mouse TNF-α and rMu TNF-α form homology by 79% amino acid, and the biological action of TNF-α is like the obvious species specificity of nothing.
TNF-α has participated in the biological process in multiple body, can kill and wound or inhibition tumor cell, improves the phagocytic activity of neutrophil leucocyte, and antiviral bacterium infects, and promotes myeloid leukemia cell to macrophage differentiation etc.Application TNF-α starts the clinical II phase to be tested at aspects such as treatment tumours, also can with IL-2 therapeutic alliance tumour, think that at present the curative effect of systemic administration is not as good as local application, the latter is as intralesional injection, local concentration is high and spinoff is also lighter.Adopted in recent years tnf gene treatment to start the tumours such as melanoma to carry out clinical verification.TNF is also relevant with the lesion degree of some clinical some diseases, and for example Kaschin-Beck disease, colitis, meningitis and asthma etc., can carry out by detecting the biochemical indicators such as TNF-α the occurrence degree of analysis of disease clinically.
Past take and puts the detection kit of exempting from as the detection TNF of representative and be subject to methodological restriction, its sensitivity and antijamming capability wretched insufficiency, have very large drawback, substantially withdraw from the market, applying at present more is enzyme linked immunosorbent detection technology and chemiluminescence.It is continue Enzyme-multiplied immune technique and the emerging technology growing up after putting immune technology the eighties that chemiluminescence rises in eighties of last century, due to its high sensitivity, high specific, while method is easy, quick, mark bond is stable, the features such as "dead" isotope damage and pollution, have obtained develop rapidly in recent years.
Magnetic particle separation enzyme-linked immunoassay technology is a kind ofly to take magnetic particle as solid phase carrier of separating, immune magnetic particle isolation technics is combined with enzyme linked immunosorbent detection technology and a kind of Novel immune detection method of setting up.Traditional E LISA method, the association reaction of antigen, antibody carries out on solid phase (elisa plate reacting hole) surface, and magnetic particle separation enzyme-linked immunoassay, the association reaction of antigen, antibody also carries out under the condition of approximate liquid phase, thereby reaction is fast, thoroughly.Compare with traditional E LISA and have highly sensitively, detect few advantage of used time.
Summary of the invention
The technical issues that need to address of the present invention are to provide diagnostic kit and the detection method thereof of a kind of quantitative detection TNF-α, adopt this kit to carry out TNF-α detection and there is higher sensitivity and specificity, and the time of shorter acquisition testing result and easier mode of operation.
Kit provided by the invention, its reagent comprising has TNF-α magnetic separation agent, enzyme labelled antibody, reinforcing agent, calibration object, control product, concentrate and substrate.
Described magnetic separation agent contains the magnetic microsphere that is marked with TNF-alpha monoclonal antibodies.
Described enzyme labelled antibody is the TNF-alpha monoclonal antibodies that contains horseradish peroxidase-labeled.
Described reinforcing agent is the damping fluid that contains Tris.
Described calibration object and control product are the solution that contains a certain amount of TNF-α antigen.
Described concentrate is the damping fluid that contains TWEEN-20 and Proclin-300.
Described substrate is enzyme-catalyzed chemical luminescence substrate.
The immue quantitative detection reagent box of TNF-α of the present invention, is preferably prepared from as follows:
The first step: the preparation process of magnetic separation agent:
1,1.0mg disuccinimidyl suberate is dissolved in 50ul DMSO, get in the 0.1mol/L PB damping fluid that 2mgTNF-alpha monoclonal antibodies is dissolved in PH 9.5 to cumulative volume be 1ml;
2, with the disuccinimidyl suberate that liquid-transfering gun is drawn in step 1, join in the antibody-solutions of step 1, put room temperature 90min;
3, step 2 antibody-solutions is joined in concentration tube, then put in high speed freezing centrifuge under 3000g concentrated 30min to volume be 0.5ml;
4, get 0.5ml magnetic bead, add in 5ml reaction cup, put into test tube rack special, through magnet adsorption, after 2 minutes, draw supernatant;
5, add 1.5ml PH9.50.1mol/L PB at every turn, mix 30 seconds, added, remove supernatant, repetitive operation 3 times; The antibody-solutions that step 3 is obtained joins in above-mentioned magnetic bead, mixes rear room temperature reaction 4 hours;
6,37 ℃ of the TRIS solution 15 minutes that add 0.3ml 1mol/L;
7, add 1.5ml PH 7.20.1mol/L PB to clean the magnetic bead of mark at every turn, mix 30 seconds, added, remove supernatant, repetitive operation 3 times;
8, with 100ml magnetic bead, preserve liquid magnetic bead is proceeded to 125ml vial; It is (being mass volume ratio) 0.1%BSA that magnetic bead is preserved formula of liquid, 0.05% Tween-20,0.02%NaN3,20% ethanol, 4 ℃ of preservations.
9, by magnetic bead buffer solution, the volume ratio according to 1: 1 mixes magnetic separation agent step 8 being obtained, and obtains magnetic separation agent in kit of the present invention; Described magnetic bead buffer solution is that concentration is the TRIS-HCl damping fluid of 1mol/L.
Second step: enzyme labelled antibody preparation process:
1,2.5mgTNF-alpha monoclonal antibodies is dissolved in the N of 1.0ml, in dinethylformamide, add 10mg/ml horseradish peroxidase aqueous solution and the 1.3mg carbodiimides of 1ml, after 1 hour, the carbodiimides of 1.0ml 20mg/ml is added, potpourri constantly stirs, and 4 ℃ are spent the night;
2, the solution of step 1 is packed in bag filter, to the PH7.4PBS dialysis of 0.15M, 4 ℃ are spent the night, and collect and retain liquid; Then adding 10ml concentration is the BSA solution of 15mg/ml, and 4 ℃ store for future use; Finally by the conjugate of the horseradish peroxidase of collecting and TNF-alpha monoclonal antibodies, with enzyme labelled antibody dilution, the volume ratio with 1: 1000 mixes, and obtains enzyme labelled antibody; Described enzyme labelled antibody dilution is that concentration is the TRIS-HCl damping fluid of 1mol/L.
The 3rd step: reinforcing agent preparation steps:
1, take TRIS1.56g and NaCl 4.23g in 1L container; With pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker of 10ml purified water, pour in above-mentioned 1L container;
2, with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely, adjust PH, control PH between 7.35-7.45;
3, take Mak330.9g in above-mentioned 1L container; Last constant volume 1000ml, after dissolving completely, filters with 0.2um filter.
The 4th step:
The preparation of calibration object and the product of control:
Calibration object concentration is respectively 0.10,0.20,0.40,0.80,1.60ng/ml; Control product concentration is respectively 0.20,0.80ng/ml.
The 5th step:
Concentrate preparation steps, preparation 1L:
1, take TRIS 12.54g and NaCl 325.6g in 1L container;
2, after taking 5g Tween-20 and adding 20ml water in 100ml container it is dissolved completely, pour in above-mentioned 1L container;
3, with pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker that fills 10ml purified water, pour in above-mentioned 1L container;
4, with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely;
5, adjust PH, control its scope between 7.35-7.45;
6, last constant volume 1000ml, filters and get final product with 0.2um filter after dissolving completely.
The 6th step:
Substrate preparation steps, preparation 1L:
1, take TRIS 2.35g, NaCl 6.41g, Na
2sO
30.002g and Proclin-3000.2ml are in 1L beaker;
2, with graduated cylinder, measure 600ml purified water in 1L beaker, fully stir, until dissolve completely, adjust PH, control its scope between 7.95-8.05;
3, add after 250ml Lumi-Phos 530, with 0.2um filter, filter and collect filtrate, by purified water, be settled to 1000ml, after mixing and get final product.
Main innovation part of the present invention is:
1, kit of the present invention combines chemiluminescence with immune magnetic particle, and a kind of reaction system that approaches homogeneous phase is provided, and compared with prior art, kit of the present invention has higher detection sensitivity and specificity, and has reached preferably performance parameter.
2, the invention discloses a kind of new special-purpose reinforcing agent and concentrate, make course of reaction more reliable and more stable, experimental data is sensitive effectively can be accurate to 0.01ng, when enhancing product performance, and greatly reduces cost of products;
3, the TNF-α magnetic separation agent in this kit, enzyme labelled antibody, reinforcing agent, calibration object, control product, concentrate and substrate are all the optimization formulas under this reaction system, giving the use effect phase of this kit and detecting performance provides powerful guarantee.
4, this kit adopts immune magnetic particle isolation technics to be combined with competitive enzyme-linked immune technology, compare with the kit of prior art, greatly shorten detection time, can in 10 minutes, detect several biological specimens, for urine, serum equal samples, can not need pre-treatment directly to detect.
Embodiment
Embodiment 1,
One, TNF-α magnetic separation agent preparation process:
1,1.0mg disuccinimidyl suberate is dissolved in 50ul DMSO, get in the 0.1mol/L PB damping fluid that 2mgTNF-alpha monoclonal antibodies (Santa Cruz company product) is dissolved in PH 9.5 to cumulative volume be 1ml;
2, with the disuccinimidyl suberate that liquid-transfering gun is drawn in step 1, join in the antibody-solutions of step 1, put room temperature 90min;
3, the solution of step 2 is joined in Centricon-10 concentration tube, then put in high speed freezing centrifuge under 3000g concentrated 30min to volume be 0.5ml;
4, get 0.5ml magnetic bead, add in 5ml reaction cup, put into test tube rack special, through magnet adsorption, after 2 minutes, draw supernatant; Magnetic bead is the conventional magnetic bead in this area, preferred concentration 25mg/mL, and diameter is 800nm.
5, add 1.5ml PH9.50.1mol/L PB at every turn, mix 30 seconds, added, remove supernatant, repetitive operation 3 times; The antibody-solutions that step 4 is obtained joins in above-mentioned magnetic bead, mixes rear room temperature reaction 4 hours;
6,37 ℃ of the TRIS solution 15 minutes that add 0.3ml 1mol/L;
7, add 1.5ml PH 7.20.1mol/L PB to clean the magnetic bead of mark at every turn, mix 30 seconds, added, remove supernatant, repetitive operation 3 times;
8, with 100ml magnetic bead, preserve liquid magnetic bead is proceeded to 125ml vial; It is 0.1%BSA that magnetic bead is preserved formula of liquid, 0.05% Tween-20,0.02%NaN3,20% ethanol (being mass volume ratio), 4 ℃ of preservations.
9, by magnetic bead buffer solution, the volume ratio according to 1: 1 mixes magnetic separation agent step 8 being obtained, and obtains magnetic separation agent in kit of the present invention; Described magnetic bead buffer solution is that concentration is the TRIS-HCl damping fluid of 1mol/L.
Embodiment 2
One, the preparation process of enzyme labelled antibody:
1,2.5mgTNF-alpha monoclonal antibodies is dissolved in the N of 1.0ml, in dinethylformamide, add 10mg/ml horseradish peroxidase aqueous solution and the 1.3mg carbodiimides of 1ml, after 1 hour, the carbodiimides of 1.0ml 20mg/ml is added, potpourri constantly stirs, and 4 ℃ are spent the night;
2, the solution of step 1 is packed in bag filter, to the PH7.4PBS dialysis of 0.15M, 4 ℃ are spent the night, and collect and retain liquid; Then adding 10ml concentration is the BSA solution of 15mg/ml, and 4 ℃ store for future use; Finally by the conjugate of the horseradish peroxidase of collecting and TNF-alpha monoclonal antibodies, with enzyme labelled antibody dilution, the volume ratio with 1: 1000 mixes, and obtains enzyme labelled antibody; Described enzyme labelled antibody dilution is that concentration is the TRIS-HCl damping fluid of 1mol/L.
Embodiment 3
Reinforcing agent preparation steps:
1, take TRIS1.56g and NaCl 4.23g in 1L container; With pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker of 10ml purified water, pour in above-mentioned 1L container;
2, with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely, adjust PH, control PH between 7.35-7.45;
3, take Mak330.9g in above-mentioned 1L container; Last constant volume 1000ml, after dissolving completely, filters with 0.2um filter.Mak33 is the commercial reagent of Roche Holding Ag.
Embodiment 4
The preparation steps of calibration object and the product of control:
1, peak: maximum concentration point is X, impact point concentration is A, B, C, D, E, F, while preparing the solution of V volume, need add the volume of raw material for being respectively: table 1
| Concentration | Add calibration object dilution volume | Add X volume |
| A | V-A*V/X | A*V/X |
| B | V-B*V/X | B*V/X |
| C | V-C*V/X | C*V/X |
| D | V-D*V/X | D*V/X |
| E | V-E*V/X | E*V/X |
| F | V-F*V/X | F*V/X |
2, TNF-α immue quantitative detection reagent box TNF-α calibration object raw material (being purchased from Santa Cruz company) is mixed with by purified water that concentration point is 0.10,0.20,0.40,0.80,1.60ng/ml; Control product with the concentration point of purified water preparation be 0.20,0.80ng/ml.
3, after dissolving completely, post label in 2-8 ℃ of refrigeration house storage, the term of validity is 12 months.
Embodiment 5:
Concentrate preparation steps:
1, take TRIS 12.54g and NaCl 325.6g in 1L container;
2, after taking 5g Tween-20 and adding suitable quantity of water in 100ml container it is dissolved completely, pour in said vesse;
3, with pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker that fills 10ml purified water, pour in above-mentioned 1L container;
4, with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely;
5, with HCL or NaOH, adjust PH, measure its scope between 7.35-7.45;
6, last constant volume 1000ml, surveys pH value, and scope meets the requirements between 7.35-7.45, after dissolving completely, with 0.2um filter, filters; After having filtered, post label in 2-8 ℃ of refrigeration house storage, the term of validity is 12 months;
Embodiment 6
Substrate formulation operations step:
1, take TRIS 2.35g, NaCl 6.41g, Na
2sO
30.002g and Proclin-3000.2ml are in 1L beaker;
2, with graduated cylinder, measure 600ml purified water in 1L beaker, fully stir, until dissolve completely; With HCl or NaOH, adjust PH, measure its scope between 7.95-8.05;
3, add after 250ml Lumi-Phos 530, with 0.2um filter, filter and collect filtrate, by purified water, be settled to 1000ml, after mixing, post label in 2-8 ℃ of refrigeration house storage, the term of validity is 12 months.
The using method of kit of the present invention is as follows:
1, add 15 μ l TNF-α calibration objects, quality-control product, sample to be measured to corresponding test tube bottom.
2, add 25 μ l enzyme labelled antibodies to each test tube.
3, add 25 μ l reinforcing agents to each test tube.
4, add 25 μ l magnetic separation agents to each test tube.
5, multitube vortex mixer vibrates gently and is placed with after the test tube rack 30s of test tube, puts 37 ℃ of water-baths 30 minutes.
6, test tube frame linking is put to magnetic separator, guarantees that every test tube all contacts with separator surface, precipitates 2 minutes, and the separation vessel that then reverses is slowly poured out supernatant.
7, concentrate is with after 10 times of purified water dilutions, adds concentrate after 100 μ l dilutions to each test tube, puts on multitube vortex mixer vibration gently and mixes 30s.
8, add 100 μ l substrate solutions and mix 3 seconds to test tube, with ready luminous detector, detect rapidly.
Clinical testing:
Case: Bronchial Asthmas 56 examples of the People's Hospital, city clinical definite, man's 29 examples, female's 27 examples, age 46-67 year, the Diagnosing Asthma standard of formulating for 2003 according to respirology branch of Chinese Medical Association asthma group (respirology branch of Chinese Medical Association asthma group. prevention and control of bronchial asthma guide. Chinese tuberculosis and breathing magazine, 2003).
Acute attack group (acute stage condition: repeatedly show effect, pant, expiratory dyspnea, uncomfortable in chest or cough medical history, bronchodilatation experiment is positive, meets the diagnostic criteria of acute phase of asthma): 38 examples.State of an illness alleviation group (paracmasis standard: through treatment or untreated symptom, sign, disappear, respiratory tract functional rehabilitation is to the front level of acute attack and maintain more than 10 days): 18 examples.Control group: all take the photograph sheet, lung function tests through medical history investigation, chest x-ray and get rid of loyalty and have the pulmonary disease may, all cases are all got rid of malignant tumour, active tuberculosis, rheumatic disease, laboratory examination, confirm without cardiovascular, breathing and liver, kidney, metabolism and endocrine system disease, nearly 2 months without the healthy population that infects history): 18 examples, man's 10 examples, female's 8 examples; Age 48-72 year.
With SPSSl0.0 statistical software, data are processed, the mean ± standard deviation for data of surveying (X ± s) represent, each organizes serum TNF-a level, between group, relatively with t, checks; P≤0.05 o'clock is that difference has statistical significance.
| Group | Control group (ng/ml) | Acute attack group (ng/ml) | Alleviation group (ng/ml) |
| TNF-alpha content | 0.178±0.011 | 0.872±0.167 | 0.235±0.049 |
Prove that thus cytokine TNF-a plays very important regulating action in the pathophysiological process of asthma.This experiment changes the gentle system of solutions of compared with normal control group to the TNF-a level in Serum of Patients with Asthma conspicuousness variation, P≤0.05.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements, all belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (1)
1. quantitatively detect a kit of TNF-α, it is characterized in that, this kit comprises TNF-α magnetic separation agent, enzyme labelled antibody, reinforcing agent, calibration object, control product, concentrate and substrate; Described kit is prepared as follows and forms: the first step: the preparation process of TNF-α magnetic separation agent:
1) 1.0mg disuccinimidyl suberate is dissolved in 50ul DMSO, get in the 0.1mol/L PB damping fluid that 2mg TNF-alpha monoclonal antibodies is dissolved in pH9.5 to cumulative volume be 1ml;
2) with liquid-transfering gun, draw step 1) in disuccinimidyl suberate join step 1) antibody-solutions in, put room temperature 90min;
3) by step 2) solution that obtains join in concentration tube, then put in high speed freezing centrifuge under 3000g concentrated 30min to volume be 0.5ml;
4) get 0.5ml magnetic bead, add in 5ml reaction cup, put into test tube rack, through magnet adsorption, after 2 minutes, draw supernatant;
5) add step 3) antibody-solutions that obtains, mix rear room temperature reaction 4 hours;
6) add 37 ℃ of the TRIS solution 15 minutes of 0.3ml1mol/L;
7) add 1.5ml pH7.20.1mol/L PB to clean the magnetic bead of mark, mix 30 seconds, added, remove supernatant;
8) with 100ml magnetic bead, preserve liquid magnetic bead is proceeded to 125ml vial; It is 0.1%BSA that magnetic bead is preserved formula of liquid, 0.05% Tween-20,0.02%NaN
3, 20% ethanol, 4 ℃ of preservations;
9) by step 8) solution that obtains mixes according to the volume ratio of 1:1 by magnetic bead buffer solution, obtains magnetic separation agent in kit; Described magnetic bead buffer solution is that concentration is the TRIS-HCl damping fluid of 1mol/L;
Second step: enzyme labelled antibody preparation process:
1) 2.5mgTNF-alpha monoclonal antibodies is dissolved in the N of 1.0ml, in dinethylformamide, add 10mg/ml horseradish peroxidase aqueous solution and the 1.3mg carbodiimides of 1ml, after 1 hour, the carbodiimides of 1.0ml20mg/ml is added, potpourri constantly stirs, and 4 ℃ are spent the night;
2) by step 1) solution pack in bag filter, to the pH7.4PBS dialysis of 0.15M, 4 ℃ are spent the night, and collect and retain liquid; Then adding 10ml concentration is the BSA solution of 15mg/ml, and 4 ℃ store for future use; Finally by above-mentioned solution, with enzyme labelled antibody dilution, the volume ratio with 1:1000 mixes, and obtains enzyme labelled antibody; Described enzyme labelled antibody dilution is that concentration is the TRIS-HCl damping fluid of 1mol/L;
The 3rd step: reinforcing agent preparation steps:
1) take TRIS1.56g and NaCl4.23g in 1L container; With pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker of 10ml purified water, pour in above-mentioned 1L container;
2) with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely, adjust pH between 7.35-7.45;
3) take Mak330.9g in above-mentioned 1L container; Last constant volume 1000ml, after dissolving completely, filters with 0.2um filter; The 4th step:
The preparation of calibration object and the product of control:
By TNF-α compound concentration be respectively 0.10,0.20,0.40,0.80, the calibration object of 1.60ng/ml; TNF-α is mixed with to concentration is respectively 0.20, the control product of 0.80ng/ml;
The 5th step:
Concentrate preparation steps, preparation 1L:
1) take TRIS12.54g and NaCl325.6g in 1L container;
2) after taking 5g Tween-20 and adding 20ml water in 100ml container it is dissolved completely, pour in above-mentioned 1L container;
3) with pipettor, Proclin-300 is measured after 0.2ml dissolves completely in the beaker that fills 10ml purified water, pour in above-mentioned 1L container;
4) with graduated cylinder, measure 800ml purified water in above-mentioned 1L container, fully stir, until dissolve completely;
5) adjust pH, control its scope between 7.35-7.45;
6) last constant volume 1000ml, filters and get final product with 0.2um filter after dissolving completely;
The 6th step:
Substrate preparation steps, preparation 1L:
1) take TRIS2.35g, NaCl6.41g, Na
2sO
30.002g and Proclin-300 0.2ml are in 1L beaker;
2) with graduated cylinder, measure 600ml purified water in 1L beaker, fully stir, until dissolve completely, adjust pH between 7.95-8.05; 3) add after 250ml Lumi-Phos530, with 0.2um filter, filter and collect filtrate, by purified water, be settled to 1000ml, after mixing and get final product.
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| CN103823064B (en) * | 2014-03-03 | 2016-05-25 | 中华人民共和国张家港出入境检验检疫局 | A kind of vomitoxin immue quantitative detection reagent box and using method thereof |
| CN104198721B (en) * | 2014-07-28 | 2016-10-05 | 北京润诺思医疗科技有限公司 | The preparation of a kind of silica-based magnetic bead bond of GP73 (GP73) antigen and application |
| CN105467137A (en) * | 2015-11-26 | 2016-04-06 | 北京豪迈生物工程有限公司 | Free human chorionic gonadotropin beta-subunit test kit and test method |
| CN106918633B (en) * | 2017-04-24 | 2019-06-25 | 中国科学院苏州生物医学工程技术研究所 | The detection method of cytokine TNF-α based on aptamer and golden magnetic nano particle |
| CN110672857A (en) * | 2019-10-10 | 2020-01-10 | 四川大学华西第二医院 | TNF-alpha high-sensitivity Elisa detection kit and use method and application thereof |
| CN113552368A (en) * | 2021-07-21 | 2021-10-26 | 苏州立禾生物医学工程有限公司 | Tumor necrosis factor alpha detection kit and detection method thereof |
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