Catalog No: RE2189H
Human SA(Sialic Acid) ELISA Kit
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48T

$299.00

96T

$399.00

Product Details

Species:

Human

Alternative Name:

Neu5Ac, NANA, N-acetylneuraminic acid

Assay Type:

Competitive

unit:

μg/mL

Standard:

500μg/mL

Sensitivity:

4.69 μg/mL

Detection Range:

7.82-500μg/mL

Assay Time:

1.5H

Sample Type:

Brain tissue;Sample Volume=50μL

Research:

Reproductive science;

Test Principle:

This ELISA kit uses the Competitive-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with Human SA. During the reaction, Human SA in the sample or standard competes with a fixed amount of Human SA on the solid phase supporter for sites on the Biotinylated Detection Ab specific to Human SA. Excess conjugate and unbound sample or standard are washed away, and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well and incubated. Then a TMB substrate solution is added to each well. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns from blue to yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of Human SA in tested samples can be calculated by comparing the OD of the samples to the standard curve.

Technical Data

As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
μg/mL OD Corrected
500 0.189
250 0.327
125 0.546
62.5 0.877
31.25 1.298
15.63 1.755
7.82 2.064
0 2.544

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level were tested on 3 different plates, 20 replicates in each plate, respectively.

Intra-assay Precision Inter-assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean(ng/mL) 22.75 69.27 206.84 10.78 68.16 162.98
Standard deviation 0.11 3.74 8.04 0.6 3.85 7.94
C V (%) 6.94 7.09 4.63 4.87 4.14 7.67

Rate of recovery

The recovery of spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
Sample Type Range(%) Average Recovery(%)
Serum (n=8) 90-105 97
EDTA plasma (n=8) 88-102 95
Cell culture media (n=8) 80-92 86

Linear

Samples were spiked with high concentrations of target proteins and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
Serum (n=5) EDTA plasma (n=5) Cell culture media (n=5)
1:2 Range (%) 88-97 85-94 83-90
Average (%) 90 85 87
1:4 Range (%) 86-92 85-94 95-102
Average (%) 86 88 102
1:8 Range (%) 81-93 80-96 93-101
Average (%) 87 95 95
1:16 Range (%) 89-105 92-101 97-105
Average (%) 101 99 99

Assay Procedures

Description