ELISA Kit for Free Thyroxine (fT4) 
FTI
- UOM
- FOB US$ 428.00 US$ 612.00 US$ 2,754.00 US$ 5,202.00 US$ 42,840.00
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Overview
Properties
- Product No.CEA185Ge
- Organism SpeciesPan-species (General) Same name, Different species.
- ApplicationsEnzyme-linked immunosorbent assay for Antigen Detection.
Research use only - DownloadInstruction Manual
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Packages (Simulation)
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Packages (Simulation)
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Results demonstration
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Typical Standard Curve
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ISO9001: 2008, ISO13485: 2003 Registered
Recovery
Matrices listed below were spiked with certain level of recombinant Free Thyroxine (fT4) and the recovery rates were calculated by comparing the measured value to the expected amount of Free Thyroxine (fT4) in samples.
| Matrix | Recovery range (%) | Average(%) |
| serum(n=5) | 79-93 | 88 |
| EDTA plasma(n=5) | 80-89 | 82 |
| heparin plasma(n=5) | 78-103 | 95 |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Free Thyroxine (fT4) were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Free Thyroxine (fT4) were tested on 3 different plates, 8 replicates in each plate.
CV(%) = SD/meanX100
Intra-Assay: CV<10%
Inter-Assay: CV<12%
Linearity
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Free Thyroxine (fT4) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
| Sample | 1:2 | 1:4 | 1:8 | 1:16 |
| serum(n=5) | 81-97% | 78-93% | 79-104% | 86-101% |
| EDTA plasma(n=5) | 90-99% | 90-104% | 91-101% | 94-105% |
| heparin plasma(n=5) | 95-102% | 78-89% | 88-95% | 97-105% |
Stability
The stability of kit is determined by the loss rate of activity. The loss rate of this kit is less than 5% within the expiration date under appropriate storage condition.
To minimize extra influence on the performance, operation procedures and lab conditions, especially room temperature, air humidity, incubator temperature should be strictly controlled. It is also strongly suggested that the whole assay is performed by the same operator from the beginning to the end.
Reagents and materials provided
| Reagents | Quantity | Reagents | Quantity |
| Pre-coated, ready to use 96-well strip plate | 1 | Plate sealer for 96 wells | 4 |
| Standard | 2 | Standard Diluent | 1×20mL |
| Detection Reagent A | 1×120µL | Assay Diluent A | 1×12mL |
| Detection Reagent B | 1×120µL | Assay Diluent B | 1×12mL |
| TMB Substrate | 1×9mL | Stop Solution | 1×6mL |
| Wash Buffer (30 × concentrate) | 1×20mL | Instruction manual | 1 |
Assay procedure summary
1. Prepare all reagents, samples and standards;
2. Add 50µL standard or sample to each well.
And then add 50µL prepared Detection Reagent A immediately.
Shake and mix. Incubate 1 hour at 37°C;
3. Aspirate and wash 3 times;
4. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
5. Aspirate and wash 5 times;
6. Add 90µL Substrate Solution. Incubate 10-20 minutes at 37°C;
7. Add 50µL Stop Solution. Read at 450 nm immediately.
Test principle
This assay employs the competitive inhibition enzyme immunoassay technique. A monoclonal antibody specific to T4 has been pre-coated onto a microplate. A competitive inhibition reaction is launched between biotin labeled T4 analogues and unlabeled antigen (Standards or samples) with the pre-coated antibody. After incubation the unbound conjugate is washed off. Next, avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. The amount of bound HRP conjugate is reverse proportional to the concentration of fT4 in the sample. After addition of the substrate solution, the intensity of color developed is reverse proportional to the concentration of fT4 in the sample.
Giveaways
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Citations
- Elevated Thyroid Peroxidase Antibody Increases Risk of Post-partum Depression by Decreasing Prefrontal Cortex BDNF and 5-HT Levels in Micepubmed:28119573
- Effect of Selenium and Zinc Supplementation on Hypothyroidism in RatsISSN 2455-2550
- Modulation of Calcitonin, Parathyroid Hormone, and Thyroid Hormone Secretion by Electrical Stimulation of Sympathetic and Parasympathetic Nerves in Anesthetized Rats.pubmed:28713236
- Age-Dependent Evaluation of Long-Term Depression Responses in Hyperthyroid Rats: Possible Roles of Oxidative Intracellular Redox StatusPubmed: 31288003
- Thyroxin and calcitonin secretion into thyroid venous blood is regulated by pharyngeal mechanical stimulation in anesthetized ratsPubmed: 31270742
- Apatinib inhibits proliferation of different lung cancer cells in vitro and in vivo by promoting apoptosis and inducing cell cycle arrest
- Effect of L©\thyroxine administration on long©\term potentiation and accompanying mitogen©\activated protein kinases in rats33576121