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Human DHEA-S(Dehydroepiandrosterone Sulfate) ELISA Kit
SKU: E-EL-H2019
Human DHEA-S(Dehydroepiandrosterone Sulfate) ELISA Kit
| Detection Range | 15.63-1000 ng/mL |
| Sensitivity | 9.38 ng/mL |
Product Details
Properties
| Assay type | Competitive-ELISA |
| Format | 96T |
| Assay time | 2.0h |
| 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 DHEA-S in samples. No significant cross-reactivity or interference between DHEA-S 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 DHEA-S concentrations in Serum, plasma and other biological fluids. |
Test Principle
This ELISA kit uses the Competitive-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with DHEA-S. During the reaction, DHEA-S in the sample or standard competes with a fixed amount of DHEA-S on the solid phase supporter for sites on the Biotinylated Detection Ab specific to DHEA-S. 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 DHEA-S in tested samples can be calculated by comparing the OD of the samples to the standard curve.
Kit Components and Storage
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.
| Item | Specifications | Storage |
|---|---|---|
| Micro ELISA Plate(Dismountable) | 96T: 8 wells ×12 strips 48T: 8 wells ×6 strips |
-20℃, 6 months |
| Reference Standard | 96T: 2 vials 48T: 1 vial |
|
| Concentrated Biotinylated Detection Ab (100×) | 96T: 1 vial, 120 μL 48T: 1 vial, 60 μL |
|
| Concentrated HRP Conjugate (100×) | 96T: 1 vial, 120 μL 48T: 1 vial, 60 μL |
-20℃(Protect from light), 6 months |
| Reference Standard & Sample Diluent | 1 vial, 20 mL | 2-8°C, 6 months |
| Biotinylated Detection Ab Diluent | 1 vial, 14 mL | |
| HRP Conjugate Diluent | 1 vial, 14 mL | |
| Concentrated Wash Buffer (25×) | 1 vial, 30 mL | |
| Substrate Reagent | 1 vial, 10 mL | 2-8℃(Protect from light) |
| Stop Solution | 1 vial, 10 mL | 2-8℃ |
| Plate Sealer | 5 pieces | |
| Manual | 1 copy | |
| Certificate of Analysis | 1 copy |
Technical Data:
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level DHEA-S were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level DHEA-S 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) | 46.30 | 89.60 | 442.40 | 44.50 | 84.10 | 469.90 |
| Standard deviation | 3.20 | 4.70 | 14.60 | 2.40 | 5.00 | 22.60 |
| CV (%) | 6.91 | 5.25 | 3.30 | 5.39 | 5.95 | 4.81 |
Recovery
The recovery of DHEA-S 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) | 88-101 | 93 |
| EDTA plasma(n=8) | 88-99 | 93 |
| Cell culture media(n=8) | 88-102 | 95 |
Target Information
| Synonyms | Androstenolone sulfate; Prasterone sulfate; Androst-5-en-3β-ol-17-one 3β-sulfate |
| Research Area | Signaling transduction |
Assay Procedures
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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 |
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2. Aspirate and wash the plate for 3 times |
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3. Add 100μL HRP conjugate working solution. Incubate for 30 min at 37°C. Aspirate and wash the plate for 5 times |
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4. Add 90μL Substrate Reagent. Incubate for 15 min at 37°C |
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5. Add 50μL Stop Solution |
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6. Read the plate at 450nm immediately. Calculation of the results |