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Human PIVKA-II(Protein Induced by Vitamin K Absence or Antagonist-II) Microsample ELISA Kit
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ELK8570MS
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48 T $265.00
96 T $376.00
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Overview

Product name: Human PIVKA-II(Protein Induced by Vitamin K Absence or Antagonist-II) Microsample ELISA Kit
Reactivity: Human
Alternative Names: PIVKA-II;  PIVKA II
Assay Type: Sandwich
Sensitivity: 0.13 ng/mL
Standard: 20 ng/mL
Detection Range: 0.32-20 ng/mL
Sample Type: serum, plasma and other biological fluids
Assay Length: 3.5h
Research Area: Hematology
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 Human PIVKA-II. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human PIVKA-II. 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 Human PIVKA-II, 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 Human PIVKA-II 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
20.00 2.198 2.116
10.00 1.675 1.593
5.00 1.270 1.188
2.50 0.980 0.898
1.25 0.538 0.456
0.63 0.435 0.353
0.31 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 PIVKA-II and the recovery rates were calculated by comparing the measured value to the expected amount of PIVKA-II in samples.
Matrix Recovery range Average
serum(n=5) 87-111% 99%
EDTA plasma(n=5) 81-106% 94%
Heparin plasma(n=5) 82-88% 85%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of PIVKA-II 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) 92-108% 92-114% 84-112% 82-111%
EDTA plasma(n=5) 87-113% 86-119% 86-106% 93-101%
Heparin plasma(n=5) 92-107% 82-93% 82-112% 86-106%

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