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Rabbit NT-ProBNP(N-Terminal Pro-Brain Natriuretic Peptide) ELISA Kit
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ELK2957
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48 T $412.00
96 T $588.00
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Overview

Product name: Rabbit NT-ProBNP(N-Terminal Pro-Brain Natriuretic Peptide) ELISA Kit
Reactivity: Rabbit
Alternative Names: NT-Pro-BNP; ; N-BNP; ANFB_HUMAN; BNP(1-32); BNP(5-29); BNP-32; Gamma-brain natriuretic peptide; nppb
Assay Type: Sandwich
Sensitivity: 12.5 pg/mL
Standard: 2000 pg/mL
Detection Range: 31.25-2000 pg/mL
Sample type: Serum, plasma, tissue homogenates and other biological fluids
Assay length: 3.5h
Research Area: Endocrinology;Cardiovascular biology;
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 Rabbit NT-ProBNP. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rabbit NT-ProBNP. 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 Rabbit NT-ProBNP, 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 Rabbit NT-ProBNP 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
2000.00 2.074 1.992
1000.00 1.636 1.554
500.00 1.186 1.104
250.00 0.933 0.851
125.00 0.541 0.459
62.50 0.319 0.237
31.25 0.172 0.090
0.00 0.082 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 NT-ProBNP and the recovery rates were calculated by comparing the measured value to the expected amount of NT-ProBNP in samples.
Matrix Recovery range Average
serum(n=5) 80-95% 87%
EDTA plasma(n=5) 83-95% 89%
Heparin plasma(n=5) 86-99% 92%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of NT-ProBNP 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) 86-95% 93-103% 85-94% 87-101%
EDTA plasma(n=5) 92-105% 82-92% 86-94% 81-95%
Heparin plasma(n=5) 85-96% 87-101% 89-102% 85-98%