Rat Norepinephrine (NA) ELISA Test Kit Instructions
Rat norepinephrine (NA) ELISA detection kit
user's Guide
Detection principle
The kit uses a double antibody one-step sandwich enzyme-linked immunosorbent assay (ELISA). To the coated microwells pre-coated with rat norepinephrine (NA) capture antibody, add samples, standards, and HRP-labeled detection antibodies in sequence, incubate and wash thoroughly. The color is developed with the substrate TMB, which is converted into blue under the catalysis of peroxidase and into the final yellow under the action of acid. The color depth is positively correlated with rat norepinephrine (NA) in the sample. The absorbance (OD value) was measured with a microplate reader at a wavelength of 450 nm, and the sample concentration was calculated.
Sample collection, processing and storage methods
1. Serum: Use a test tube that does not contain pyrogens and endotoxins. Avoid any cell stimulation during the operation. After collecting blood, centrifuge at 3000 rpm for 10 minutes to quickly and carefully separate serum and red blood cells.
2. Plasma: EDTA, citrate or heparin anticoagulation. Take the supernatant by centrifugation at 3000 rpm for 30 minutes.
3. Cell supernatant: centrifuge at 3000 rpm for 10 minutes to remove particles and polymers.
4. Tissue homogenate: Add tissue to the right amount of saline and mash. Take the supernatant by centrifugation at 3000 rpm for 10 minutes.
5. Preservation: If the sample is not tested in time after collection, please aliquot it in one dose and freeze it at -20 ℃ to avoid repeated freezing and thawing. Thaw at room temperature and ensure that the sample is thawed evenly and fully.
Bring your own items
1. Microplate reader (450nm)
2. High-precision sampler and tip: 0.5-10uL, 2-20uL, 20-200uL, 200-1000uL
3. 37 ℃ thermostat
Operation notes
1. Store the kit at 2-8 ° C and equilibrate at room temperature for 20 minutes before use. The concentrated washing liquid taken out of the refrigerator will have crystals, which is a normal phenomenon. The water bath is heated to completely dissolve the crystals before use.
2. The slats not used in the experiment should be immediately returned to the ziplock bag, sealed (dry at low temperature) and stored.
3. The standard dilution can be regarded as a negative control or blank; the sample after pretreatment does not need to be diluted, just take 10μL and add it.
4. Perform the incubation operation strictly in accordance with the time, amount of liquid and sequence indicated in the manual.
5. Shake all liquid components thoroughly before use.
Kit composition
Name 96-well configuration 48-well configuration remarks
Microwell microplate 12 wells × 8 strips 12 wells × 4 strips none
Standard (240pg / mL) 0.6mL 0.6mL Dilute according to the instructions
Standard dilution 6mL3mL
Sample diluent 6mL3mL
Detection antibody-HRP10mL5mL
20 × washing buffer 25mL15mL diluted according to the instructions
Substrate A6mL3mL
Substrate B6mL3mL None
Stop solution 6mL3mL
Sealing film 2 pieces 2 pieces without
Instructions 1 copy 1 copy
1 ziplock bag
Note: The standard product is diluted with standard product diluent in order: 240, 120, 60, 30, 15, 7.5pg / mL
Reagent preparation
Dilution of 20 × washing buffer: 1:20 dilution of distilled water, that is, 1 part of 20 × washing buffer plus 19 parts of distilled water.
Washing method
1. Manually wash the plate: throw away all the liquid in the hole, fill each hole with the washing liquid, leave the liquid in the hole after standing for 1min, pat dry on absorbent paper, and wash the plate 5 times.
2. Automatic plate washing machine: Inject 350μL of washing liquid into each well, soak for 1min, and wash the plate 5 times.
Steps
1. Take out the required slats from the aluminum foil bag after equilibrating at room temperature for 20 min. The remaining slats are sealed with a ziplock bag and put back at 4 ° C.
2. Set up standard wells and sample wells, add 50μL of standard products of different concentrations to the standard wells;
3. Add 10μL of the sample to be tested first, and then add 40μL of the sample diluent;
4. Then add 100μL of detection antibody labeled with horseradish peroxidase (HRP) to each well of the standard well and the sample well, seal the reaction well with a sealing film, and incubate for 60min in a 37 ° C water bath or thermostat.
5. Discard the liquid, pat dry on the absorbent paper, fill each well with the washing solution, let it stand for 1 min, shake off the washing solution, pat dry on the absorbent paper, and repeat washing the plate 5 times (you can also wash the plate with a washing machine)
6. Add 50 μL of substrate A and B to each well, and incubate at 37 ° C in the dark for 15 minutes.
7. Add 50μL of stop solution to each well, and measure the OD value of each well at 450nm wavelength within 15min.
Result judgment
Draw standard curve: In the Excel worksheet, the standard product concentration is used as the abscissa, and the corresponding OD value is used as the ordinate.
Kit performance
1. Accuracy: The correlation coefficient R between the linear regression of the standard product and the expected concentration is greater than or equal to 0.9900.
2. Sensitivity: The minimum detection concentration is less than 1.0pg / mL.
3. Specificity: Does not cross-react with other soluble structural analogs.
4. Repeatability: The coefficients of variation within and between panels are less than 15%.
5. Storage: 2-8 ℃, protected from light and moisture.
6. Validity: 6 months
Disclaimer
1. The kit is for research use only, and should not be used for clinical or human experiments, otherwise all the consequences will be borne by the experimenter, and the company will not be responsible.
2. Strictly follow the instructions, and the experimenter violates the instructions, and the consequences will be borne by the experimenter.
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