Rat E2(Estradiol) ELISA Kit
Size: Price:
48 T $265.00
96 T $376.00


Product name: Rat E2(Estradiol) ELISA Kit
Reactivity: Rat
Alternative Names: 17B-Estradiol; Oestradiol; Beta-Estradiol
Assay Type: Competitive Inhibition
Sensitivity: 4.45 pg/mL
Standard: 1000 pg/mL
Detection Range: 15.63-1000 pg/mL
Sample Type: serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay Length: 2h
Research Area: Endocrinology;Reproductive science;Hormone metabolism;
Test principle: This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with Rat E2 protein. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rat E2. 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 Rat E2 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
1000.00 0.197
500.00 0.396
250.00 0.527
125.00 0.857
62.50 1.169
31.25 1.457
15.63 1.796
0.00 2.112


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.


Matrices listed below were spiked with certain level of recombinant E2 and the recovery rates were calculated by comparing the measured value to the expected amount of E2 in samples.
Matrix Recovery range Average
serum(n=5) 85-97% 91%
EDTA plasma(n=5) 81-95% 88%
Heparin plasma(n=5) 90-105% 87%


The linearity of the kit was assayed by testing samples spiked with appropriate concentration of E2 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) 85-97% 90-99% 87-103% 85-101%
EDTA plasma(n=5) 87-96% 91-101% 87-98% 89-103%
Heparin plasma(n=5) 79-91% 84-98% 95-105% 88-102%