Human lupus anticoagulant (LA) ELISA kit scientific research description - Database & Sql Blog Articles

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

LA-1015026

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Kaixin micro test

Test probe P100-M3

Human lupus anticoagulant (LA)

ELISA

Kit

Scientific research experiment description

This kit is for research use only.

Experimental principle

The kit uses a double antibody sandwich method to determine the expression of human lupus anticoagulant (LA) in the specimen. The microplate is coated with purified human lupus anticoagulant (LA) antibody to prepare a solid phase antibody, which can be combined with the lupus anticoagulant (LA) in the sample, and washed to remove unbound antigen and other components. The antibody-antigen-enzyme-labeled antibody complex is formed by binding to an HRP-labeled lupus anticoagulant (LA) antibody, and after thorough washing, the substrate TMB is added 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 absorbance (OD value) was measured at 450 nm using a microplate reader, and compared with the CUTOFF value to determine the presence or absence of human lupus anticoagulant (LA) in the specimen.

Human lupus anticoagulant (LA)

ELISA

Kit

composition

130 times concentrated washing solution 20ml × 1 bottle 7 stop solution 6ml × 1 bottle

2 enzyme standard reagent 6ml × 1 bottle 8 positive control 0.5ml × 1 bottle

3 enzyme label coating plate 12 holes × 8 9 negative control 0.5ml × 1 bottle

4 sample dilution 6ml × 1 bottle 10 instructions 1 copy

5 color developing agent A liquid 6ml × 1 bottle 11 sealing film 2 sheets

6 color developer B liquid 6ml × 1 bottle 12 sealed bag 1

Specimen requirements

1. 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.

2. Samples containing NaN3 could not be detected because NaN3 inhibited horseradish peroxidase (HRP) activity.

Human lupus anticoagulant (LA)

ELISA

Kit

Steps

1. No.: The corresponding micropores of the sample are numbered sequentially. Each plate should be provided with 2 holes for negative control, 2 holes for positive control, and 1 well for blank control (no blank sample control and enzyme standard reagent, the other steps are the same)

2. Loading: 50 μl of negative control and positive control were added to the negative and positive control wells, respectively. Then, add 40 μl of the sample dilution to the sample well to be tested, and then add 10 μl 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, and shake it gently.

3. Incubation: The plate was sealed with a sealing film and incubated at 37 ° C for 30 minutes.

4. Dosing: 30 times concentrated washing solution diluted with distilled water 30 times and used

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

6. Add enzyme: 50 μl of enzyme labeling reagent was added to each well, except for blank wells.

7. Incubation: The operation is the same as 3.

8. Washing: The operation is the same as 5.

9. Color development: Add 50 μl of the developer to each well, then add 50 μl of the developer, gently shake and mix, and color at 37 ° C for 15 minutes.

10. Termination: 50 μl of stop solution was added to each well to terminate the reaction (when 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.

Human lupus anticoagulant (LA)

ELISA

Kit

Calculation and result determination:

Test validity: mean value of positive control well ≥ 1.00; mean value of negative control ≤ 0.10

CUTOFF calculation: critical value = negative control hole average + 0.15

Negative judgment: sample OD value <critical value (CUTOFF) is lupus anticoagulant (LA) negative

Positive judgment: The sample OD value ≥ critical value (CUTOFF) is positive for lupus anticoagulant (LA).

Precautions

1. Operate in strict accordance with

Human lupus anticoagulant (LA)

ELISA

Kit

The instructions shall be carried out, and the components of the different batches of this reagent shall not be mixed.

2. The kit should be taken out from the refrigerated environment and should be used at room temperature for 15-30 minutes before use. If the enzyme label is unsealed after opening, the slats should be stored in a sealed bag.

3. Concentrated washing liquid may crystallize out. When diluted, it can be heated and dissolved in a water bath. The washing will not affect the result.

4. The sealing film is intended for single use only to avoid cross-contamination.

5. Please keep the substrate away from light.

6. The test results must be determined by the microplate reader. When using dual-wavelength detection, the reference wavelength is 630nm.

7. All samples, washings and various wastes should be treated as infectious materials. The stop solution is 2M sulfuric acid, which must be used

be careful.

Storage conditions and expiration date

1. Kit storage: 2-8 ° C.

2. Validity: 6 months