VA (Vitamin A) ELISA Kit
- SKU:
- AEES00010
- Product Type:
- ELISA Kit
- ELISA Type:
- Competitive
- Size:
- 96 Assays
- Sensitivity:
- 9.38 ng/mL
- Range:
- 15.63-1000 ng/mL
- Sample Type:
- Serum, plasma and other biological fluids
Description
| Product Name: | VA (Vitamin A) ELISA Kit |
| Product Code: | AEES00010 |
| Assay Type: | Competitive |
| Format: | 96T |
| Assay Time: | 2.5h |
| Detection Range: | 15.63-1000 ng/mL |
| Sensitivity: | 9.38 ng/mL |
| Sample Type & Sample Volume: | Serum, plasma and other biological fluids, 50μL |
| Specificity: | This kit recognizes VA in samples. No significant cross-reactivity or interference between VA and analogues was observed. |
| Reproducibility: | Both intra-CV and inter-CV are < 10%. |
| Application: | This ELISA kit applies to the in vitro quantitative determination of VA concentrations in serum, plasma and other biological fluids. |
This ELISA kit uses the Competitive-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with VA. During the reaction, VA in the sample or standard competes with a fixed amount of VA on the solid phase supporter for sites on the Biotinylated Detection Ab specific to VA. Excess conjugate and unbound sample or standard are washed away, and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well and incubated. Then a TMB substrate solution is added to each well. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns from blue to yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of VA in tested samples can be calculated by comparing the OD of the samples to the standard curve.
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level VA were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level VA were tested on 3 different plates, 20 replicates in each plate.
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (ng/mL) | 41.24 | 111.72 | 435.17 | 48.23 | 106.85 | 497.43 |
| Standard deviation | 2.07 | 5.31 | 22.98 | 2.54 | 5.03 | 23.03 |
| CV (%) | 5.02 | 4.75 | 5.28 | 5.27 | 4.71 | 4.63 |
Recovery
The recovery of VA spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
| Sample Type | Range (%) | Average Recovery (%) |
| Serum(n=8) | 99-111 | 104 |
| EDTA plasma(n=8) | 90-104 | 98 |
| Cell culture media(n=8) | 91-99 | 95 |
| Kit Components: | An unopened kit can be stored at 2-8℃ for 1 month. If the kit is not supposed to be used within 1 month, store the components separately according to the following conditions once the kit is received.
|
| 1. | Add 50μL standard or sample to the wells, immediately add 50μL Biotinylated Detection Ab working solution to each well. Incubate for 45 min at 37°C |
| 2. | Aspirate and wash the plate for 3 times |
| 3. | Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times |
| 4. | Add 90μL Substrate Reagent. Incubate for 15 min at 37°C |
| 5. | Add 50μL Stop Solution |
| 6. | Read the plate at 450nm immediately. Calculation of the results |
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