eLISA instructions: human von Willebrand factor (VWF) elisa kit Beijing spot

Human von Willebrand Factor (VWF) Enzyme-linked immunosorbent assay (ELISA) eLISA instructions: human von Willebrand factor (VWF) elisa kit Beijing spot kit instructions for use This reagent is for research purposes only: for this kit For the determination of von Willebrand Factor (VWF) in human serum, plasma and related fluid samples. Experimental principle: This kit uses the double antibody sandwich method to determine the level of human von Willebrand factor (VWF) in the specimen. The microporous plate was coated with purified human von Willebrand factor (VWF) antibody to prepare a solid phase antibody, and von Willebrand factor (VWF) was sequentially added to the microcapsule of the coated monoclonal antibody, followed by HRP labeling. The von Willebrand Factor (VWF) antibody binds to form an antibody-antigen-enzyme-labeled antibody complex, which is thoroughly washed and then added to the substrate TMB for color development. TMB is converted to blue under the catalysis of HRP enzyme and converted to the final yellow color by the action of an acid. The color depth is positively correlated with von Willebrand Factor (VWF) in the sample. The absorbance (OD value) was measured at 450 nm using a microplate reader, and the concentration of human von Willebrand factor (VWF) in the sample was calculated from a standard curve. Kit composition: Kit composition 48-well configuration 96-well configuration Storage instructions 1 copy 1 part sealing film 2 pieces (48) 2 pieces (96) sealed bag 1 piece of enzyme-labeled plate 1×48 1×96 2 -8 ° C preservation standard: 4500 ng / L 0.5ml × 1 bottle 0.5ml × 1 bottle 2-8 ° C preservation standard dilution 1.5ml × 1 bottle 1.5ml × 1 bottle 2-8 ° C preservation enzyme standard reagent 3 ml × 1 bottle 6 ml × 1 bottle 2-8 ° C Preservation sample dilution 3 ml × 1 bottle 6 ml × 1 bottle 2-8 ° C Preservation developer A solution 3 ml × 1 bottle 6 ml × 1 bottle 2-8 ° C preservation Reagent B Liquid 3 ml × 1 bottle 6 ml × 1 bottle 2-8 ° C Preservation solution 3 ml × 1 bottle 6 ml × 1 bottle 2-8 ° C Preservation concentrated washing solution (20ml × 20 times) × 1 bottle (20ml × 30 times) × 1 bottle 2-8 ° C preservation eLISA instructions: human von Willebrand factor (VWF) elisa kit Beijing spot sample processing and requirements: 1. Serum: room temperature blood natural coagulation 10-20 minutes, centrifugation 20 minutes Left and right (2000-3000 rpm). The supernatant is carefully collected, and if precipitation occurs during storage, it should be centrifuged again. 2. Plasma: EDTA or sodium citrate should be selected as an anticoagulant according to the requirements of the specimen. After mixing for 10-20 minutes, centrifuge for about 20 minutes (2000-3000 rpm). The supernatant is carefully collected, and if a precipitate forms during storage, it should be centrifuged again. 3. Urine: Collect with a sterile tube and centrifuge for about 20 minutes (2000-3000 rpm). The supernatant is carefully collected, and if a precipitate forms during storage, it should be centrifuged again. The chest and ascites and cerebrospinal fluid are referred to. 4. Cell culture supernatant: When detecting secreted components, collect them in a sterile tube. Centrifuge for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. When the intracellular components were detected, the cell suspension was diluted with PBS (pH 7.2-7.4) to a cell concentration of about 1 million/ml. By repeated freezing and thawing, the cells are destroyed and the intracellular components are released. Centrifuge for 20 minutes and 7 minutes (2000-3000 rpm). Collect the supernatant carefully. If a precipitate forms during storage, it should be centrifuged again. 5. Tissue specimen: After cutting the specimen, weigh the weight. Add a certain amount of PBS, pH 7.4. It was quickly frozen and stored in liquid nitrogen for use. The specimen still maintains a temperature of 2-8 ° C after melting. A certain amount of PBS (pH 7.4) was added, and the specimen was homogenized by hand or homogenizer. Centrifuge for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. One part of the package is to be tested, and the rest is frozen for use. 6. The specimens should be extracted as soon as possible after collection, and the extraction should be carried out according to the relevant literature. The experiment should be carried out as soon as possible after extraction. If the test cannot be performed immediately, the specimen can be stored at -20 °C, but repeated freezing and thawing should be avoided. 7. Samples containing NaN3 cannot be detected because NaN3 inhibits horseradish peroxidase (HRP) activity. Operation steps 1. Dilution and loading of standard products: 10 holes of standard wells are placed on the enzyme labeling plate, 100 μl of standard is added to the first and second holes, and then added in the first and second holes. Mix 50 μl of the standard dilution and mix well; then add 100 μl from each of the first and second wells to the third and fourth wells, and then add 50 μl of the standard dilution to the third and fourth wells. Then, 50 μl of each of the third and fourth wells is discarded, and 50 μl of each is added to the fifth and sixth wells, respectively, and 50 μl of the standard dilution is added to the fifth and sixth wells, respectively. Evenly; after mixing, take 50μl from each of the fifth and sixth holes and add them to the seventh and eighth holes respectively. Then add 50μl of the standard dilution in the seventh and eighth holes, and mix them from the seventh. 50 μl of the eighth well was added to the ninth and tenth holes, and 50 μl of the standard dilution was added to the ninth and tenth holes, respectively, and 50 μl of each of the ninth and tenth holes was discarded. (The amount of each well was 50 μl after dilution, and the concentrations were 3000 ng/L, 2000 ng/L, 1000 ng/L, 500 ng/L, 250 ng/L, respectively). 2. Adding samples: Set blank holes separately (the blank control wells are not added with the sample and the enzyme standard reagent, the other steps are the same), and the sample holes to be tested. Add 40 μl of the sample dilution to the sample well to be tested on the plate, and then add 10 μl of the sample to be tested (the final dilution of the sample is 5 times). Add the sample to the bottom of the well of the microplate, try not to touch the wall of the well, and shake gently to mix. 3. Incubation: After sealing with a sealing film, incubate at 37 ° C for 30 minutes. 4. Dosing: Dilute 30 (20 times of 48T) concentrated washing solution with distilled water 30 (20 times of 48T) and set aside. 5. Washing: Carefully remove the sealing film, discard the liquid, dry it, fill each well with the washing solution, let stand for 30 seconds, then discard it, repeat 5 times, and pat dry. 6. Add enzyme: Add 50 μl of enzyme labeling reagent to each well, except for blank wells. 7. Incubation: operation is the same as 3. 8. Washing: operation is the same as 5. 9. Color development: add 50 μl of color developer A, add 50 μl of color developer B, gently shake and mix, and avoid light at 37 °C. 15 min.10. Termination: 50 μl of stop solution was added to each well to stop the reaction (the blue color turned yellow). 11. Measurement: The absorbance (OD value) of each well was measured sequentially with a blank air conditioner of zero and a wavelength of 450 nm. The measurement should be carried out within 15 minutes after the addition of the stop solution. eLISA instructions: human vascular hemophilia factor (VWF) elisa kit Beijing spot notes: 1. The kit should be taken out from the refrigerated environment and allowed to equilibrate for 15-30 minutes at room temperature. If the enzyme label is unsealed after unsealing, the strip should be stored in a sealed bag. 2. Concentrated washing liquid may crystallize out. When diluted, it can be heated and dissolved in a water bath. The washing does not affect the result. 3. The sampler should be used for each step and the accuracy should be corrected frequently to avoid test errors. It is best to control the loading time within 5 minutes. If the number of specimens is large, it is recommended to use a gun. 4. Please make a standard curve at the same time of each measurement, it is best to make a double hole. If the content of the substance to be tested in the specimen is too high (the OD value of the sample is larger than the OD value of the first hole of the standard well), please first dilute the sample dilution with a certain multiple (n times) and then measure it. When calculating, multiply the total dilution by the total dilution. Multiple (×n×5). 5. The sealing film is intended for single use only to avoid cross-contamination. 86. Keep the substrate away from light. 7. Strictly follow the instructions of the manual, the test results must be based on the microplate reader reading. 8. All samples, washings and various wastes should be treated as infectious materials. 9. The different batch components of this reagent must not be mixed. 10. In the case of an English manual, the English manual shall prevail. eLISA instructions: human von Willebrand factor (VWF) elisa kit Beijing spot calculation: the concentration of the standard is the abscissa, the OD value is the ordinate, and the standard curve is drawn on the coordinate paper, according to the OD value of the sample The standard curve is used to find the corresponding concentration; multiply by the dilution factor; or calculate the linear regression equation of the standard curve using the concentration of the standard and the OD value, substitute the OD value of the sample into the equation, calculate the sample concentration, and multiply by the dilution factor. , which is the actual concentration of the sample. (This figure is for reference only) Kit performance: 1. The linear regression coefficient of the sample and the expected concentration correlation coefficient R value is 0.92 or more. 2. Within and between batches should be less than 9% and 15% detection range: 100 ng / L - 4000 ng / LeLISA instructions: human von Willebrand factor (VWF) elisa kit Beijing spot preservation conditions and validity: 1 . Kit storage: 2-8 ° C. 2. Validity: 6 months

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