Under the action of acidic solution and reductant, ferric ions can be separated from transferrin in serum, and reduced into ferrous ions (Fe2+). The latter then bind to bipyridine and form pink complexes. The concentration of iron can be calculated by measuring the OD value at 520 nm indirectly.
Performance characteristics
| Sample type |
Serum, plasma, animal tissue |
| Sensitivity |
0.08 mg/L |
| Detection range |
0.08-20 mg/L |
| Detection method |
Colorimetric method |
| Assay type |
Quantitative |
| Assay time |
45 min |
| Precision |
Average inter-assay CV: 3.200%Average intra-assay CV: 3% |
| Other instruments required |
Test tubes, Vortex Mixer, Centrifuge, Water bath, Test tubes, Vortex Mixer, Centrifuge, Water bath |
| Storage |
2-8℃ |
| Valid period |
12 months |

Dilution of sample
It is recommended to take 2~3 samples with expected large difference to do pre-experiment before formal experiment and dilute the sample according to the result of the pre-experiment and the detection range (0.08-50 mg/L).
The recommended dilution factor for different samples is as follows (for reference only):
|
Sample type
|
Dilution factor
|
|
Human plasma
|
1
|
|
Human serum
|
1
|
|
10% Rat liver tissue homogenate
|
1
|
|
10% Epipremnum aureum homogenate
|
1
|
Note: The diluent is double distilled water).