Instruction manual of rat urea (Urea) ELISA kit

Instruction manual of rat urea (Urea) ELISA kit

This reagent is for research purposes only: this kit is used to determine the content of urea (Urea) in rat serum, plasma and related liquid samples.

Experimental principle:

This kit uses the double antibody sandwich method to determine the level of rat urea (Urea) in the specimen. Microporous plates were coated with purified rat urea (Urea) antibody to make solid-phase antibodies. Urea (Urea) was added to the monoclonal antibody-coated microwells in turn, and then combined with HRP-labeled urea (Urea) antibody to form The antibody-antigen-enzyme-labeled antibody complex is thoroughly washed and added with substrate TMB 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 urea (Urea) in the sample. The absorbance (OD value) was measured with a microplate reader at a wavelength of 450 nm, and the concentration of rat urea (Urea) in the sample was calculated by a standard curve.

Kit composition:

Kit composition

48 hole configuration

96-well configuration

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Instructions

1 serving

Sealing film

2 pieces (48)

2 pieces (96)

sealed bag

Enzyme coated plate

1 Ã— 48

1 Ã— 96

Store at 2-8 â„ƒ

Standard product: 72Î¼mol / L

0.5ml Ã— 1 bottle

Store at 2-8 â„ƒ

Standard dilution

1.5ml Ã— 1 bottle

Store at 2-8 â„ƒ

Enzyme reagent

3 ml Ã— 1 bottle

6 ml Ã— 1 bottle

Store at 2-8 â„ƒ

Sample diluent

3 ml Ã— 1 bottle

6 ml Ã— 1 bottle

Store at 2-8 â„ƒ

Developer A liquid

3 ml Ã— 1 bottle

6 ml Ã— 1 bottle

Store at 2-8 â„ƒ

Developer B liquid

3 ml Ã— 1 bottle

6 ml Ã— 1 bottle

Store at 2-8 â„ƒ

Stop solution

3ml Ã— 1 bottle

6ml Ã— 1 bottle

Store at 2-8 â„ƒ

Concentrated washing liquid

(20ml Ã— 20 times) Ã— 1 bottle

(20ml Ã— 30 times) Ã— 1 bottle

Store at 2-8 â„ƒ

Sample processing and requirements:

1. Serum: room temperature blood coagulates naturally for 10-20 minutes, centrifuged for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully and centrifuge again if a precipitate appears during storage.

2. Plasma: EDTA or sodium citrate should be selected as the anticoagulant according to the requirements of the specimen, mixed for 10-20 minutes, and centrifuged for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. If a precipitate forms during storage, it should be centrifuged again.

3. Urine: collected in a sterile tube and centrifuged for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. If a precipitate forms during storage, centrifuge again. Pleural and ascites, cerebrospinal fluid reference implementation.

4. Cell culture supernatant: When detecting secreted components, collect with a sterile tube. Centrifuge for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. When detecting the components inside the cells, dilute the cell suspension with PBS (PH7.2-7.4), and the cell concentration will reach about 1 million / ml. Through repeated freezing and thawing, the cells are destroyed and the intracellular components are released. Centrifuge for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. If a precipitate forms during storage, it should be centrifuged again.

5. Organize the specimen: after cutting the specimen, weigh it. Add a certain amount of PBS, PH7.4. Quickly freeze and save with liquid nitrogen for later use. After the specimen melts, it still maintains a temperature of 2-8 Â° C. Add a certain amount of PBS (PH7.4) and homogenize the specimen with a manual or homogenizer. Centrifuge for about 20 minutes (2000-3000 rpm). Collect the supernatant carefully. After aliquoting, a portion is to be tested, and the rest is frozen for future use.

6. The specimen should be extracted as soon as possible after collection. The extraction should be carried out according to 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 â„ƒ, but repeated freezing and thawing should be avoided.

7. The sample containing NaN3 cannot be detected because NaN3 inhibits the activity of horseradish peroxidase (HRP).

Steps:

1. Dilution and loading of standard products: 10 standard wells are set on the enzyme-coated plate, 100Î¼l of the standard products are added to the first and second wells respectively, and then the standard products are added to the first and second wells 50Î¼l of diluent, mix well; then take 100Î¼l from the first well and the second well and add them to the third and fourth wells respectively, and then add 50Î¼l of standard diluent to the third and fourth wells respectively, mix well; Then take 50Î¼l each in the third and fourth wells and discard it, then add 50Î¼l each to the fifth and sixth wells, and then add 50ul of the standard dilution solution to the fifth and sixth wells respectively, and mix well; After mixing, take 50Î¼l from the fifth and sixth wells and add them to the seventh and eighth wells respectively. Then add 50Î¼l of the standard dilution solution to the seventh and eighth wells respectively. Take 50Î¼l from the eight wells and add them to the ninth and tenth wells. Then add 50Î¼l of the standard dilution solution to the ninth and tenth wells. After mixing, take 50Î¼l from the ninth and tenth wells and discard. (After dilution, the volume of each well is 50Î¼l, and the concentration is 48Î¼mol / L, 32Î¼mol / L, 16Î¼mol / L, 8Î¼mol / L, 4Î¼mol / L).

2. Adding 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 40Î¼l of sample diluent to the test sample well of the enzyme-coated plate, and then add 10Î¼l of the sample to be tested (the final dilution of the sample is 5 times). Add the sample and add the sample to the bottom of the well of the microplate, try not to touch the wall of the well, shake gently to mix.

3. Incubation: seal the plate with a sealing film and incubate at 37 Â° C for 30 minutes.

4. Mixing solution: Dilute 30 times (20 times of 48T) concentrated washing solution with distilled water 30 times (20 times of 48T) and then reserve.

5. Washing: Carefully peel off the sealing film, discard the liquid, spin dry, fill each well with the washing solution, let it stand for 30 seconds and then discard, repeat this 5 times, pat dry.

6. Add enzyme: add 50Î¼l 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 50Î¼l of developer A to each well, and then add 50Î¼l of developer B, mix gently, and develop at 37 Â° C in the dark for 15 minutes.

10. Termination: Add 50Î¼l of stop solution to each well to stop the reaction (at this time, the blue color turns 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 carried out within 15 minutes after adding the stop solution.

Precautions:

1. The kit should be taken out of the refrigerated environment and equilibrated at room temperature for 15-30 minutes before use. If the enzyme-coated plate is unsealed after opening, 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 the water bath during dilution, and the results will not be affected during washing.

3. The sample adder should be used in each step of sample addition, and its accuracy should be regularly checked to avoid test errors. It is best to control the sampling time 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 (the OD value of the sample is greater than the OD value of the first well of the standard well), please first dilute it with a certain multiple (n times) of the sample diluent and then determine it. When calculating, please multiply the total dilution Multiple (Ã— n Ã— 5).

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 based on the reading of the microplate reader.

8. All samples, washing liquid 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.

Calculation:

Taking the concentration of the standard as the abscissa and the OD value as the ordinate, draw a standard curve on the coordinate paper, and find the corresponding concentration from the standard curve according to the OD value of the sample; then multiply it by the dilution factor; or use the concentration of the standard Calculate the linear regression equation of the standard curve with the OD value, substitute the OD value of the sample into the equation, calculate the sample concentration, and multiply it by the dilution factor to obtain the actual concentration of the sample.

Kit performance:

1. The correlation coefficient R between the linear regression of the sample and the expected concentration is above 0.95.

2. The batch and approval shall be less than 9% and 11% respectively

Detection range: 3Î¼mol / L -60Î¼mol / L

Storage conditions and validity period:

1. Store the kit: 2-8 â„ƒ.

2. Validity: 6 months

Xiamen Huijia Biotechnology Co., Ltd. is a professional agent for many well-known brands in the international life science field. Committed to the sales and promotion of various ELISA kits, immunohistochemical kits, primary and secondary antibodies, cytokines, biological reagents, pipettes, and consumables.

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