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Cattle I-PTH(IntactParathormone) ELISA Kit
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ELK7810
Size： Price：
48 T $412.00
96 T $588.00
96 T*5 $2499.00
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Overview

Product name: Cattle I-PTH(IntactParathormone) ELISA Kit
Reactivity: Cattle
Alternative Names: iPTH; Intact Parathyroid Hormone; Parathormone; Parathyrin; PTH; Parathyroid Hormone
Assay Type: Sandwich
Sensitivity: 3.7 pg/mL
Standard: 800 pg/mL
Detection Range: 12.5-800 pg/mL
Sample Type: serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay Length: 3.5h
Research Area: Metabolic pathway;Endocrinology;Hormone metabolism;
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 Cattle I-PTH. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Cattle I-PTH. 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 Cattle I-PTH, 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 Cattle I-PTH 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
800.00 2.195 2.091
400.00 1.579 1.475
200.00 1.197 1.093
100.00 0.826 0.722
50.00 0.563 0.459
25.00 0.369 0.265
12.50 0.226 0.122
0.00 0.104 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 I-PTH and the recovery rates were calculated by comparing the measured value to the expected amount of I-PTH in samples.
Matrix Recovery range Average
serum(n=5) 87-99% 93%
EDTA plasma(n=5) 92-105% 98%
Heparin plasma(n=5) 83-95% 101%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of I-PTH 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% 86-97% 90-98%
EDTA plasma(n=5) 91-99% 83-89% 88-94% 87-93%
Heparin plasma(n=5) 89-97% 95-104% 82-96% 85-98%