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Rat PP(Pepsin) ELISA Kit
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ELK10050
Size： Price：
48 T $320.00
96 T $458.00
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Overview

Product name: Rat PP(Pepsin) ELISA Kit
Reactivity: Rat
Alternative Names: PP; Pepsin
Assay Type: Competitive Inhibition
Sensitivity: 0.91 ng/mL
Standard: 200 ng/mL
Detection Range: 3.13-200 ng/mL
Sample type: Serum, plasma and other biological fluids
Assay length: 2h
Research Area: Enzyme & Kinase;Tumor immunity;Gastroenterology;
Test principle: This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with Rat PP. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Rat PP. 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 PP 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
200.00 0.189
100.00 0.332
50.00 0.593
25.00 0.927
12.50 1.289
6.25 1.596
3.13 1.715
0.00 2.132

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 PP and the recovery rates were calculated by comparing the measured value to the expected amount of PP in samples.
Matrix Recovery range Average
serum(n=5) 82-95% 88%
EDTA plasma(n=5) 78-96% 87%
Heparin plasma(n=5) 78-95% 86%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of PP 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) 87-98% 95-102% 81-103% 89-101%
EDTA plasma(n=5) 78-92% 83-96% 87-101% 87-96%
Heparin plasma(n=5) 82-93% 82-90% 92-101% 85-92%