Human insulin-like growth factor-2 (IGF-2) ELISA kit instructions for use This kit is for research use only.
Drug Name:
Generic name: Human Insulin-Like Growth Factor-2 (IGF-2) ELISA Kit Purpose:
This kit is used to determine insulin-like growth factor-2 (IGF-2) in human serum, plasma, tissue or other related tissue fluids
content.
Experimental principle The kit uses the double antibody sandwich method to determine the level of insulin-like growth factor-2 (IGF-2) in the specimen. Microporous plates were coated with purified human insulin-like growth factor-2 (IGF-2) antibody to make solid-phase antibodies. Insulin-like growth factor-2 (IGF-2) antigen was added to the monoclonal antibody-coated microwells in sequence Then, it is combined with HRP-labeled goat anti-human antibody to form an antibody-antigen-enzyme-labeled antibody complex. After thorough washing, the substrate TMB is added for color development. TMB is converted into blue under the catalysis of HRP enzyme, and into the final yellow under the action of acid. The color depth is positively correlated with the insulin-like growth factor-2 (IGF-2) in the sample. The absorbance (OD value) was measured with a microplate reader at a wavelength of 450 nm, and the insulin-like growth factor-2 (IGF-2) antigen concentration in the sample was calculated by a standard curve.
Kit composition
1 20 times concentrated washing solution 30ml × 1 bottle 7 stop solution 6ml × 1 bottle
2 Enzyme label reagent 6ml × 1 bottle 8 standard (1800ng / L) 0.5ml × 1 bottle
3 Enzyme label coating plate 12 well × 8 strips 9 standard dilution 1ml × 1 bottle
4 Sample diluent 6ml × 1 bottle 10 instructions 1 copy
5 Developer A solution 6ml × 1 bottle 11 2 sealing film
6 Developer B solution 6ml × 1 / bottle 12 sealed bag 1 specimen requirement
1. Experiment as soon as possible after specimen collection.
2. The samples containing NaN3 cannot be detected because NaN3 inhibits horseradish peroxidase (HRP) activity.
3. The specimen can be stored at -20 ℃, but repeated freezing and thawing should be avoided.
Steps
1. Dilution and loading of standard products: set 10 standard wells on the enzyme-coated plate, add 100 μl of the standard products in the first and second wells, and then add the standard products in the first and second wells. 50μl of diluent, mix well; then take 50μl of each in the first and second wells and discard; then add 50μl of each to the third and fourth wells, and then add standard to the third and fourth wells respectively 50μl of the solution, after mixing, add 50μl to the fifth and sixth wells respectively, and then add 50ul of the standard dilution solution to the fifth and sixth wells respectively, and mix; Take 50μl from each of the six wells and add them to the seventh and eighth wells respectively. Then add 50μl of the standard dilution solution to the seventh and eighth wells respectively. After mixing, take 50μl from the seventh and eighth wells respectively In the ninth and tenth wells, add 50μl of standard dilution solution to the ninth and tenth wells,
After mixing, take 50 μl from the ninth and tenth wells and discard. (After dilution, the volume of each well is 50μl, and the concentration is 1200 respectively.
ng / L, 600ng / L, 300ng / L, 150ng / L, 75ng / L).
2. Add samples: set up blank wells (the blank control wells do not add samples and enzyme reagents, the rest of the steps are the same) and the sample wells to be tested. Add 40μl of sample diluent to the test sample well of the enzyme-coated plate, and then add 10μl of the test sample (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 gently shake it.
3. Incubation: seal the plate with the sealing film and incubate at 37 ° C for 30 minutes.
4. Mixing solution: Dilute 25 times concentrated washing liquid with distilled water 25 times and reserve
5. Washing: Carefully peel off the sealing film, discard the liquid, spin dry, fill each well with washing liquid, let stand for 30 seconds, then discard,
Repeat 5 times and pat dry.
6. Add enzyme: add 50μl of enzyme label reagent to each well, except blank well.
7. Incubation: The operation is the same as 3.
8. Washing: The operation is the same as 5.
9. Color development: add 50μl of developer A to each well, then add 50μl of developer B, gently shake to mix, avoid light at 37 ℃
15 minutes.
10. Termination: Add 50μl of stop solution to each well to stop the reaction (at this time the blue will turn to yellow).
11. Determination: Measure the absorbance (OD value) of each well in sequence with the blank air conditioner at zero and 450 nm wavelength. The measurement should be performed within 15 minutes after adding the liquid.
The calculation takes the concentration of the standard as the abscissa and the OD value as the ordinate, and draws a standard curve on the coordinate paper.
Find the corresponding concentration of the OD value from the standard curve; multiply by the dilution factor; or use the standard concentration and OD value to calculate the linear regression equation of the quasi-curve, substitute the OD value of the sample into the equation, calculate the sample concentration, and multiply The dilution is the actual concentration of the sample.
Precautions
1. The kit should be taken out of the refrigerated environment and equilibrated at room temperature for 15-30 minutes before use. The enzyme-coated plate should be used after unsealing, and the strip should be stored in a sealed bag.
2. Crystals may be precipitated in the concentrated washing liquid, which can be heated and dissolved in a water bath during dilution, and the results will not be affected during washing.
3. The sampler should be used at each step of sample addition, and the accuracy should be regularly checked to avoid test errors. The sampling time is controlled within 5 minutes. If there are many specimens, it is recommended to use a volley gun to add samples.
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 test substance in the specimen is too high (sample O
Is greater than the OD value of the first well of the standard well), please dilute it with a certain multiple of the sample diluent (n times), and then multiply the total dilution multiple (× n × 5) when measuring.
5. The sealing film is limited to one-time use to avoid cross-contamination.
6. Please keep the substrate away from light.
7. Strictly follow the instructions, and the test results must be determined by the microplate reader.
8. All samples, washing liquids and various wastes should be treated as infectious agents.
9. The components of different batches of this reagent shall not be mixed.
10. If there is any difference with the English manual, the English manual shall prevail.
examination range:
50μg / L-1500μg / L
specification:
96 servings / box storage conditions and expiration date
1. Kit storage :; 2-8 ℃.
2. Validity: 6 months
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