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PS(Phosphatidylserine) ELISA Kit
ELK8149
Size： Price：
48 T $265.00
96 T $376.00
Manual MSDS Send email to us

Overview

Product name: PS(Phosphatidylserine) ELISA Kit
Reactivity: General
Alternative Names: Ptd-L-Ser; PtdSer
Assay Type: Competitive Inhibition
Sensitivity: 5.16 ng/mL
Standard: 1200 ng/mL
Detection Range: 18.75-1200 ng/mL
Sample Type: Serum, plasma and other biological fluids
Assay Length: 2h
Research Area: Neuro science;Developmental science;Nutrition metabolism;
Test principle: This assay employs the competitive inhibition enzyme immunoassay technique. The microtiter plate provided in this kit has been pre-coated with PS. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to PS. 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 PS 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
1200.00 0.199
600.00 0.396
300.00 0.621
150.00 0.857
75.00 1.152
37.50 1.522
18.75 1.793
0.00 2.211

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 PS and the recovery rates were calculated by comparing the measured value to the expected amount of PS in samples.
Matrix Recovery range Average
serum(n=5) 82-95% 88%
EDTA plasma(n=5) 95-107% 101%
Heparin plasma(n=5) 90-105% 91%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of PS 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) 79-97% 86-92% 96-105% 89-97%
EDTA plasma(n=5) 85-100% 84-98% 97-101% 88-96%
Heparin plasma(n=5) 89-99% 83-96% 93-102% 87-98%