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  • 小鼠皮质酮(CORT)ELISA Kit 小鼠皮质酮(CORT)ELISA试剂盒

    中国教育装备采购网 2012/8/7 11:22:12 围观41次 我要分享

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    小鼠皮质酮(CORT)ELISA Kit 小鼠皮质酮(CORT)ELISA试剂盒 Mouse Corticosterone(CORT)
    ELISA Kit
    (96T)
    ? This immunoassay kit allows for the in vitro quantitative determination of mouse
    CORT concentrations in serum, plasma.
    ? Expiration date six months from the date of manufacture
    ? FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC PROCEDURES.
    2
    PRINCIPLE OF THE ASSAY
    The microtiter plate provided in this kit has been pre-coated with
    a goat-anti-rabbit antibody. Standards or samples are then
    added to the appropriate microtiter plate wells with a
    HRP-conjugated CORT and antibody preparation specific for
    CORT 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 CORT in the samples is then
    determined by comparing the O.D. of the samples to the
    standard curve.
    DETECTION RANGE
    0.08 ng/ml-20 ng/ml. The standard curve concentrations used for
    the ELISA’s were 20ng/ml, 5ng/ml, 1.25ng/ml, 0.31ng/ml
    0.08ng/ml.
    SPECIFICITY
    This assay recognizes mouse CORT. No significant
    cross-reactivity or interference was observed.
    3
    SENSITIVITY
    The minimum detectable dose of mouse CORT is typically less
    than 0.05 ng/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
    Standards (S0-S5) 6 x 0.5 ml
    HRP-conjugate 1 x 6 ml
    Antibody 1 x 6 ml
    Wash Buffer
    1 x 15 ml
    (20×concentrate)
    Substrate A 1 x 7 ml
    Substrate B 1 x 7 ml
    Stop Solution 1 x 7 ml
    Standard S0 S1 S 2 S3 S4 S5
    Concentration
    (ng/ml)
    0 0.08 0.31 1.25 5 20
    4
    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,
    provided it is stored as prescribed above. Refer to the
    package label for the expiration date.
    2. Opened test plate should be stored at 2-8? C in the aluminum
    foil bag with desiccants to minimize exposure to damp air. The
    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.
    TECHNICAL HINTS
    1. Bring all reagents and plate to room temperature for at least
    30 minutes before use. Unused wells need store at 2-8℃and
    avoid sunlight.
    2. Centrifuge vials before opening to collect contents.
    5
    3. Wash Buffer If crystals have formed in the concentrate,
    warm to room temperature and mix gently until the crystals
    have completely dissolved. Dilute 15 ml of Wash Buffer
    Concentrate into deionized or distilled water to prepare 300 ml
    of Wash Buffer.
    4. 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.
    5. 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.
    6. To ensure accurate results, proper adhesion of plate sealers
    during incubation steps is necessary. Sealers can not be
    reused.
    7. Substrate Solution should remain colorless or light blue until
    added to the plate. Keep Substrate Solution protected from
    light. Substrate Solution should change from colorless or light
    blue to gradations of blue.
    6
    8. 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.
    Precaution: The Stop Solution provided with this kit is an acid solution. Wear
    eye, hand, face, and clothing protection when using this material.
    OTHER SUPPLIES REQUIRED
    ? Microplate reader capable of measuring absorbance at 450
    nm, with the correction wavelength set at 540 nm or 570 nm.
    ? Pipettes and pipette tips.
    ? Deionized or distilled water.
    ? Squirt bottle, manifold dispenser, or automated microplate
    washer.
    ? An incubator which can provide stable incubation conditions
    up to 37°C±0.5°C.
    SAMPLE COLLECTION AND STORAGE
    ? Serum Use a serum separator tube (SST) and allow
    samples to clot for 30 minutes before centrifugation for 15
    7
    minutes at 1000 g. Remove serum and assay immediately or
    aliquot and store samples at -20°C. Centrifuge the sample
    again after thawing before the assay. Avoid repeated
    freeze-thaw cycles.
    ? Plasma Collect plasma using citrate, EDTA, or heparin as
    an anticoagulant. Centrifuge for 15 minutes at 1000 g within
    30 minutes of collection. Assay immediately or aliquot and
    store samples at -20°C. Centrifuge the sample again after
    thawing before the assay. 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.
    All the reagents should be added directly to the liquid level in the well. The
    pipette should avoid contacting the inner wall of the well.
    1. Set a Blank well without any solution. Add 50μl of Standard or
    Sample per well. Standards need test in duplicate.
    2. Add 50μl of HRP-conjugate to each well (not to Blank well),
    then add 50μl Antibody to each well. Mix well and then
    incubate for 1 hour at 37°C.
    8
    3. Fill each well with Wash Buffer (about 200μl), stay for 10
    seconds and Spinning. Repeat the process for a total of three
    washes. 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 Substrate B to each well, mix
    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 10 minutes,
    using a microplate reader set to 450 nm.
    CALCULATION OF RESULTS
    Using the professional soft "Curve Exert 1.3" to make a standard curve is
    recommended, which can be downloaded from our web.
    Average the duplicate readings for each standard, Blank, and
    sample and subtract the optical density of Blank. Create a
    standard curve by reducing the data using computer software
    9
    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 x-axis against the
    concentration on the y-axis and draw a best fit curve through the
    points on the graph. The data may be linearized by plotting the
    log of the CORT 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
    ? The kit should not be used beyond the expiration date on the
    kit label.
    ? Do not mix or substitute reagents with those from other lots or
    sources.
    ? If samples generate values higher than the highest standard,
    dilute the samples with the appropriate Calibrator Diluent and
    repeat the assay.
    ? Any variation in operator, pipetting technique, washing
    technique, incubation time or temperature, and kit age can
    cause variation in binding.
    1 0
    ? 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
    Immunoassay, the possibility of interference cannot be
    excluded.
    PRECISION
    Intra-assay Precision (Precision within an assay)
    One sample whose concentration between the highest and the
    second standard were tested twenty times on one plate to
    assess.
    CV%<8%
    Inter-assay Precision (Precision between assays)
    One sample whose concentration between the highest and the
    second standard were tested in thirty-five separate assays to
    assess
    CV%<10%
    1 1
    PLATE LAYOUT
    Use this plate layout as a record of standards and samples
    assayed.

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