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ELK Biotechnology

ELK9472

Horse APLN(Apelin) ELISA Kit

Horse APLN(Apelin) ELISA Kit

Sensitivity

Horse APLN(Apelin) ELISA Kit

Overview

Product name: Horse APLN(Apelin) ELISA Kit
Reactivity: Horse
Alternative Names: XNPEP2; APEL; APJ en犬enous ligand
Assay Type: Sandwich
Sensitivity: 45 pg/mL
Standard: 8000 pg/mL
Detection Range: 125-8000 pg/mL
Sample Type: serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay Length: 3.5h
Research Area: Endocrinology;
Test principle: The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Horse APLN. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Horse APLN. Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Horse APLN, biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. 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 Horse APLN in the samples is then determined by comparing the OD of the samples to the standard curve.

Standard curve

Concentration (ng/mL) OD Corrected OD
8000.00 2.201 2.116
4000.00 1.663 1.578
2000.00 1.196 1.111
1000.00 0.876 0.791
500.00 0.585 0.500
250.00 0.356 0.271
125.00 0.215 0.130
0.00 0.085 0.000

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 APLN and the recovery rates were calculated by comparing the measured value to the expected amount of APLN in samples.
Matrix Recovery range Average
serum(n=5) 80-93% 86%
EDTA plasma(n=5) 80-97% 88%
Heparin plasma(n=5) 80-95% 87%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of APLN 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) 85-96% 87-101% 89-102% 88-105%
EDTA plasma(n=5) 85-101% 86-98% 96-107% 86-93%
Heparin plasma(n=5) 88-92% 82-93% 96-105% 87-98%
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