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CSB-E05187h人鐵蛋白(FE)ELISA試劑盒說明書

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 Human Ferritin(FE) ELISA Kit
Catalog No. CSB-E05187h
(96 tests)
This immunoassay kit allows for the in vitro quantitative determination of human FE concentrations in serum, plasma and other biological fluids.
Expiration date six months from the date of manufacture
FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC PROCEDURES.
 
廈門慧嘉生物長期經(jīng)營ELISA試劑盒及抗體、細(xì)胞因子、生化試劑、耗材等生物試劑產(chǎn)品。誠信經(jīng)營,價(jià)格實(shí)惠,服務(wù)周到,質(zhì)量有保證。歡迎廣告老師來詢!:   :  1048735792 或登陸/download(下載原版說明書)
 
INTRODUCTION
Ferritin is a ubiquitous intracellular protein that stores iron and releases it in a controlled fashion. The protein is produced by almost all living organisms, including bacteria, algae and higher plants, and animals. In humans, it acts as a buffer against iron deficiency and iron overload.[3]
Ferritin is a globular protein complex consisting of 24 protein subunits and is the primary intracellular iron-storage protein in both prokaryotes and eukaryotes, keeping iron in a soluble and non-toxic form. Ferritin that is not combined with iron is called apoferritin.
PRINCIPLE OF THE ASSAY
The microtiter plate provided in this kit has been pre-coated with an antibody specific to FE. Standards or samples are then added to the appropriate microtiter plate wells with a Horseradish Peroxidase (HRP) -conjugated antibody preparation specific for FE and incubated. Then substrate solutions are added to each well. The enzyme-substrate reaction is terminated by the addition of a sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of FE in the samples is then determined by comparing the O.D. of the samples to the standard curve.
DETECTION RANGE
5 ng/ml-160 ng/ml. The standard curve concentrations used for the ELISA’s were 160 ng/ml, 80 ng/ml, 35 ng/ml,15ng/ml, 5ng/ml.
SPECIFICITY
This assay recognizes human FE. No significant cross-reactivity or interference was observed.
SENSITIVITY
The minimum detectable dose of human FE is typically less than 2.5ng/ml. The sensitivity of this assay, or Lower Limit of Detection (LLD) was defined as the lowest protein concentration that could be differentiated from zero.
MATERIALS PROVIDED

Reagent
Quantity
 
Assay plate
1
 
Standard
5 x 0.5 ml
 
HRP-conjugate
1 x 6 ml
 
Substrate A
1 x 7 ml
 
Substrate B
1 x 7 ml
 
Stop Solution
1 x 7 ml
 

Standard
S1
S2
S3
S4
S5
Concentration (ng/ml)
5
16
35
80
160

STORAGE
1          Unopened test kits should be stored at 2-8°C upon receipt and the microtiter plate should be kept in a sealed bag. The test kit may be used throughout the expiration date of the kit. Refer to the package label for the expiration date.
2          Opened test kits will remain stable until the expiring date shown, provided it is stored as prescribed above.
3          A microtiter plate reader with a bandwidth of 10 nm or less and an optical density range of 0-3 OD or greater at 450nm wavelength is acceptable for use in absorbance measurement.
 
OTHER SUPPLIES REQUIRED
1           Microplate reader capable of measuring absorbance at 450 nm, with the correction wavelength set at 540 nm or 570 nm.
2           Pipettes and pipette tips.
3           Deionized or distilled water.
4           Squirt bottle, manifold dispenser, or automated microplate washer.
 
SAMPLE COLLECTION AND STORAGE
1           Serum Use a serum separator tube (SST) and allow samples to clot for 30 minutes before centrifugation for 15 minutes at 1000 x g. Remove serum and assay immediay or aliquot and store samples at -20° C. Avoid repeated freeze-thaw cycles.
2           Plasma Collect plasma using citrate, EDTA, or heparin as an anticoagulant. Centrifuge for 15 minutes at 1000 x g within 30 minutes of collection. Assay immediay or aliquot and store samples at -20°C. Avoid repeated freeze-thaw cycles.
 
Note: Grossly hemolyzed samples are not suitable for use in this assay.
ASSAY PROCEDURE
Bring all reagents and samples to room temperature before use. It is recommended that all samples, standards, and controls be assayed in duplicate.
 
1          Set a Blank well without any solution. Add 50µl of Standard or Sample per well.
2          Add 50µl of HRP-Conjugate to each well (Not to Blank!). Incubate for 1 hour at 37°C.
3          Aspirate each well and wash, repeating the process three times for a total of three washes. Wash by filling each well with ddH2O (200µl) using a squirt bottle, multi-channel pipette, manifold dispenser or autowasher. Complete removal of liquid at each step is essential to good performance. After the last wash, remove any remaining Wash Buffer by aspirating or decanting. Invert the plate and blot it against clean paper towels.
4          Add 50µl of Substrate A and 50µl Substrate B to each well. Incubate for 15 minutes at 37°C. Keeping the plate away from drafts and other temperature fluctuations in the dark.
5          Add 50µl of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
6          Determine the optical density of each well within 30 minutes, using a microplate reader set to 450 nm.
 
CALCULATION OF RESULTS
Average the duplicate readings for each standard, control, and sample and subtract the average zero standard optical density. Create a standard curve by reducing the data using computer software capable of generating a four parameter logistic (4-PL) curve-fit. As an alternative, construct a standard curve by plotting the mean absorbance for each standard on the y-axis against the concentration on the x-axis and draw a best fit curve through the points on the graph. The data may be linearized by plotting the log of the FE concentrations versus the log of the O.D. and the best fit line can be determined by regression analysis. This procedure will produce an adequate but less precise fit of the data. If samples have been diluted, the concentration read from the standard curve must be multiplied by the dilution factor.
LIMITATIONS OF THE PROCEDURE
1           The kit should not be used beyond the expiration date on the kit label.
2           Do not mix or substitute reagents with those from other lots or sources.
3           If samples generate values higher than the highest standard, dilute the samples and repeat the assay.
4           Any variation in operator, pipetting technique, washing technique, incubation time or temperature, and kit age can cause variation in binding.
5           This assay is designed to eliminate interference by soluble receptors, binding proteins, and other factors present in biological samples. Until all factors have been tested in the Quantikine Immunoassay, the possibility of interference cannot be excluded.
 
TECHNICAL HINTS
1           When mixing or reconstituting protein solutions, always avoid foaming.
2           To avoid cross-contamination, change pipette tips between additions of each standard level, between sample additions, and between reagent additions. Also, use separate reservoirs for each reagent.
3           When using an automated plate washer, adding a 30 second soak period following the addition of wash buffer, and/or rotating the plate 180 degrees between wash steps may improve assay precision.
4           To ensure accurate results, proper adhesion of plate sealers during incubation steps is necessary.
5           Substrate Solution should remain colorless until added to the plate. Keep Substrate Solution protected from light. Substrate Solution should change from colorless to gradations of blue.
6           Stop Solution should be added to the plate in the same order as the Substrate Solution. The color developed in the wells will turn from blue to yellow upon addition of the Stop Solution. Wells that are green in color indicate that the Stop Solution has not mixed thoroughly with the Substrate Solution.

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