Products

Human FA(Folic Acid) ELISA Kit
One-click to copy product information
ELK8986
Size： Price：
48 T $265.00
96 T $376.00
Manual MSDS Send email to us

Overview

Product name: Human FA(Folic Acid) ELISA Kit
Reactivity: Human
Alternative Names: VB9; Vitamin B9; Folacin; Folate; V; Itamin M; Vitamin M; Vitamin Bc; Pteroyl-L-Glutamic Acid; Pteroyl-L-Glutamate
Assay Type: Competitive Inhibition
Sensitivity: 15 pg/mL
Standard: 10000 pg/mL
Detection Range: 156.25-10000 pg/mL
Sample type: serum, plasma, tissue homogenates, cell lysates, cell culture supernates and other biological fluids
Assay length: 2h
Research Area: Hematology;Reproductive 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 Human FA. Standards or samples are added to the appropriate microtiter plate wells then with a biotin-conjugated antibody specific to Human FA. 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 Human FA 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
10000.00 0.197
5000.00 0.336
2500.00 0.611
1250.00 0.967
625.00 1.197
312.50 1.585
156.25 1.799
0.00 2.112

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 FA and the recovery rates were calculated by comparing the measured value to the expected amount of FA in samples.
Matrix Recovery range Average
serum(n=5) 80-93% 86%
EDTA plasma(n=5) 89-103% 96%
Heparin plasma(n=5) 78-90% 97%

Linearity

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of FA 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) 83-94% 85-96% 92-102% 82-93%
EDTA plasma(n=5) 83-97% 92-103% 87-98% 93-101%
Heparin plasma(n=5) 88-97% 86-92% 95-103% 89-97%