Products

DHEA(Dehydroepiandrosterone) ELISA Kit
ELK7826
Size： Price：
48 T $265.00
96 T $376.00
Download ① Send email to us

Overview

Product name: DHEA(Dehydroepiandrosterone) ELISA Kit
Reactivity: General
Alternative Names: DHEA
Assay Type: Competitive Inhibition
Sensitivity: 256 pg/mL
Standard: 10000 pg/mL
Detection Range: 156.25-10000 pg/mL
Sample Type: Serum, plasma and other biological fluids
Assay Length: 2h
Research Area: Endocrinology;Reproductive science;Hormone metabolism;Rheumatology;
Test principle: This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with DHEA protein. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to DHEA. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm ± 10nm. The concentration of DHEA in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (pg/mL) OD Corrected OD
10000.00 0.191
5000.00 0.332
2500.00 0.567
1250.00 0.878
625.00 1.112
312.50 1.537
156.25 1.733
0.00 2.028

Precision

Intra-assay Precision (Precision within an assay)：CV%<8%

Three samples of known concentration were tested twenty times on one plate to assess intra-assay precision.

Inter-assay Precision (Precision between assays)：CV%<10%

Three samples of known concentration were tested in forty separate assays to assess inter-assay precision.

Recovery

Matrices listed below were spiked with certain level of recombinant DHEA and the recovery rates were calculated by comparing the measured value to the expected amount of DHEA in samples.
Matrix Recovery range Average
serum(n=5) 85-97% 91%
EDTA plasma(n=5) 90-103% 96%
Heparin plasma(n=5) 87-99% 98%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of DHEA and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Matrix 1:2 1:4 1:8 1:16
serum(n=5) 86-93% 91-103% 89-97% 85-94%
EDTA plasma(n=5) 87-96% 85-97% 85-94% 87-96%
Heparin plasma(n=5) 80-101% 87-101% 86-97% 88-95%