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CLIA kit for Homo sapiens (Human) Fibrinogen (FG)

F1; FI; Fbg; Coagulation Factor I

Description: Fibrinogen (FG)

Organism Species: Homo sapiens (Human)

Sample Type: Plasma

Test Method: Double-antibody Sandwich

Assay Length: 2h, 40min

Detection Range: 2.74-2,000ng/mL

Sensitivity: The minimum detectable dose of this kit is typically less than 1.35ng/mL.

 

Specifity: This assay has high sensitivity and excellent specificity for detection of Fibrinogen (FG). No significant cross-reactivity or interference between Fibrinogen (FG) and analogues was observed.

Typical Standard Curve:

 

 

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.

Storage: Store at 4°C for frequent use. Stored at -20°C in a manual defrost freezer for one year without detectable loss of activity. Avoid repeated freeze-thaw cycles.

Notes: For In vitro laboratory use only. Not for any clinical, therapeutic, or diagnostic use in humans or animals. Not for animal or human consumption.

Recovery

Matrices listed below were spiked with certain level of recombinant Fibrinogen (FG) and the recovery rates were calculated by comparing the measured value to the expected amount of Fibrinogen (FG) in samples.

MatrixRecovery range (%)Average(%)
serum(n=5)79-9588
EDTA plasma(n=5)79-9790
heparin plasma(n=5)77-9692

 

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Fibrinogen (FG) were tested 24 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Fibrinogen (FG) 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 Fibrinogen (FG) and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample1:21:41:81:16
serum(n=5)93%-100%94-103%99-104%98-106%
EDTA plasma(n=5)92-102%94-102%81-93%88-94%
heparin plasma(n=5)95-105%84-95%97-98%86-103%

 

Reagents and materials provided

ReagentsQuantityReagentsQuantity
Pre-coated, ready to use 96-well strip plate1Plate sealer for 96 wells4
Standard2Standard Diluent1×20mL
Detection Reagent A1×120µLAssay Diluent A1×12mL
Detection Reagent B1×120µLAssay Diluent B1×12mL
TMB Substrate1×9mLStop Solution1×6mL
Wash Buffer (30 × concentrate)1×20mLInstruction manual1

 

Assay procedure summary

1. Prepare all reagents, samples and standards;
2. Add 100µL standard or sample to each well. Incubate 1 hours at 37°C;
3. Aspirate and add 100µL prepared Detection Reagent A. Incubate 1 hour at 37°C;
4. Aspirate and wash 3 times;
5. Add 100µL prepared Detection Reagent B. Incubate 30 minutes at 37°C;
6. Aspirate and wash 5 times;
7. Add 90µL Substrate Solution. Incubate 10-20 minutes at 37°C;
8. Add 50µL Stop Solution. Read at 450nm immediately.

 

Test principle

The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Fibrinogen (FG). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Fibrinogen (FG). Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Fibrinogen (FG), biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. 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 Fibrinogen (FG) in the samples is then determined by comparing the O.D. of the samples to the standard curve.

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