Instructions for use of human Brucellosis antibody ELISA kit

This kit is for research use only.

Drug name: Generic name: Human Brucellosis antibody ELISA kit

purpose of usage:

This kit qualitatively determines the expression of human Brucellosis antibody in human blood or other related tissues

Experimental principle:

This kit uses double-antigen sandwich enzyme-linked immunoassay (ELISA) to determine human Brucellosis antibodies in the specimen. Coat the microplate with purified human Brucellosis antibody to make a solid-phase antigen, which can be combined with the human Brucellosis antibody in the sample. After washing to remove unbound antibody and other components, Combined with HRP-labeled Brucellosis antigen to form an antigen-antibody-enzyme-labeled antigen 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 absorbance (OD value) was measured with a microplate reader at a wavelength of 450 nm, and compared with the CUTOFF value to determine the presence or absence of antibodies to human Brucellosis in the specimen.

Kit composition:

1

20 times concentrated washing liquid

30ml × 1 bottle

7

Stop solution

6ml × 1 bottle

2

Enzyme reagent

6ml × 1 / bottle

8

Positive control

0.5ml × 1 bottle

3

Enzyme coated plate

12 holes × 8

9

Negative control

0.5ml × 1 bottle

4

Sample diluent

6ml × 1 bottle

10

Instructions

1 serving

5

Developer A liquid

6ml × 1 bottle

11

Sealing film

2 sheets

6

Developer B liquid

6ml × 1 bottle

12

sealed bag

1

Specimen requirements:

1. Specimen processing: serum and plasma specimens can be directly detected

2. Perform the experiment as soon as possible after the specimen is prepared as required. If it can not be detected in time, the specimen can be stored at -20 ℃ for one month, but repeated freezing and thawing should be avoided.

3. The samples containing NaN3 cannot be detected because NaN3 inhibits horseradish peroxidase (HRP) activity.

Steps:

1. Numbering: serially number the corresponding microwells of the sample, each plate should be set with 2 wells for negative control, 2 wells for positive control, and 1 well for blank control (the blank control well does not add sample and enzyme reagent, the rest of the steps are the same)

2. Add sample: add 50μl of negative control and positive control (standard) to the negative and positive control wells respectively. Then add 40μl of sample diluent to the sample well, and then add 10μl of the sample to be tested. Add the sample to the bottom of the well of the microplate, try not to touch the wall of the well, gently shake to mix,

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

4. Mixing solution: add 20 times concentrated washing liquid to distilled water to 600ml and reserve

5. Washing: Carefully peel off the sealing film, discard the liquid, spin dry, fill each well with the washing liquid, let it stand for 30 seconds and then discard, repeat this 5 times, 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, mix gently, and develop at 37 ℃ for 15 minutes in the dark

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 carried out within 15 minutes after adding the stop solution.

Result judgment:

Test effectiveness: the average of positive control wells ≥1.00; the average of negative control wells ≤0.15

Calculation of critical value (CUT OFF): critical value = average value of negative control wells + 0.15

Negative judgment: the sample with OD value <cut-off value (CUT OFF) is negative for human Brucellosis antibody

Positive judgment: the sample with OD value ≥ critical value (CUT OFF) is positive for human Brucellosis antibody

Precautions

1. The operation is strictly in accordance with the instructions. The components of different batches of this reagent must not be mixed.

2. The kit should be equilibrated at room temperature for 15-30 minutes before being taken out of the refrigerated environment. If the enzyme label coated plate is unopened, the strip should be stored in a sealed bag.

3. 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.

4. The sealing film is limited to one-time use to avoid cross-contamination.

5. Please keep the substrate away from light.

6. The test results must be determined based on the reading of the microplate reader. When using dual wavelength detection, the reference wavelength is 630nm

7. All samples, washing liquids and various wastes should be treated as infectious agents. The stop solution is 2M sulfuric acid, and you must pay attention to safety when using it.

Specification: 96 servings / box

Storage conditions and validity period

1. Kit storage :; 2-8 ℃.

2. Validity: 6 months

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