48T
$299.00
96T
$399.00
Species:
Universal
Alternative Name:
Vanillyl Mandelic Acid
Assay Type:
Competitive
unit:
ng/mL
Standard:
100 ng/mL
Sensitivity:
0.94 ng/mL
Detection Range:
1.56-100 ng/mL
Assay Time:
1.5H
Sample Type:
Serum, Plasma, Tissue homogenates, Cell lysates, Cell culture supernates and Other biological fluids
Research:
Metabolic pathway;Endocrinology;Cardiovascular biology;Hepatology;Gastroenterology;Hormone metabolism;
Test Principle:
This ELISA kit uses the Competitive-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with VMA. Standards or samples are added to the appropriate micro ELISA plate wells then with a biotin-conjugated antibody specific to VMA. 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 VMA in the samples is then determined by comparing the OD of the samples to the standard curve.
| ng/mL | OD | Corrected |
|---|---|---|
| 100 | 0.263 | |
| 50 | 0.363 | |
| 25 | 0.557 | |
| 12.5 | 0.818 | |
| 6.25 | 1.113 | |
| 3.13 | 1.508 | |
| 1.56 | 1.822 | |
| 0 | 2.486 |
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) | 196.85 | 420.17 | 2808.99 | 204.92 | 314.47 | 3496.5 |
| Standard deviation | 20.98 | 46.36 | 145.09 | 26.11 | 57.7 | 180.6 |
| C V (%) | 3.31 | 5.43 | 2.9 | 5.56 | 7.04 | 5.33 |
| Sample Type | Range(%) | Average Recovery(%) |
|---|---|---|
| Serum (n=8) | 84-96 | 90 |
| EDTA plasma (n=8) | 80-95 | 87 |
| Cell culture media (n=8) | 87-99 | 93 |
| Serum (n=5) | EDTA plasma (n=5) | Cell culture media (n=5) | ||
|---|---|---|---|---|
| 1:2 | Range (%) | 90-99 | 87-103 | 89-98 |
| Average (%) | 98 | 91 | 97 | |
| 1:4 | Range (%) | 95-106 | 87-103 | 96-105 |
| Average (%) | 96 | 93 | 98 | |
| 1:8 | Range (%) | 87-101 | 84-97 | 95-103 |
| Average (%) | 89 | 95 | 98 | |
| 1:16 | Range (%) | 80-86 | 88-97 | 95-103 |
| Average (%) | 81 | 94 | 95 |