Human SA(Sialic Acid) ELISA Kit

    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
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    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience
    • competitive-ELISA-Elabscience

      Catalog number:E-EL-H2024

      Synonyms:Neu5Ac, NANA, N-acetylneuraminic acid

      Size:
      • 96T
      • 24T
      Qty:
      - +
      Price: $580

      Reactivity: Human

      Detection Range: 7.81~500 μg/mL

      Sensitivity: 4.69 μg/mL

      Lead Time: 7~10 daysWelcome to order from local distributors.

      Add to cart Compare Bulk request Manual

      Intended use

      This ELISA kit applies to the in vitro quantitative determination of Human SA concentrations in serum, plasma and other biological fluids.

      Test principle

      This ELISA kit uses the Competitive-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with Human SA. During the reaction, Human SA in the sample or standard competes with a fixed amount of Human SA on the solid phase supporter for sites on the Biotinylated Detection Ab specific to Human SA. Excess conjugate and unbound sample or standard are washed from the plate, and Avidin conjugated to Horseradish Peroxidase (HRP) are added to each microplate well and incubated. Then a TMB substrate solution is added to each well. The enzyme-substrate reaction is terminated by the addition of stop solution and the color change is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The concentration of Human SA in the samples is then determined by comparing the OD of the samples to the standard curve.

      Assay type Competitive-ELISA
      Format 96T
      Assay time 2.5h
      Reactivity Human
      Detection Method Colormetric
      Detection Range 7.81—500 μg/mL
      Sensitivity 4.69 μg/mL
      Sample Volume 50μL
      Sample Type Serum, plasma and other biological fluids

      Specificity

      This kit recognizes Human SA in samples. No significant cross-reactivity or interference between Human SA and analogues was observed.

      Typical data

      As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.

      Concentration(μg/mL) O.D Average
      500 0.333
      0.363
      0.348
      250 0.434
      0.488
      0.461
      125 0.655
      0.653
      0.654
      62.5 0.943
      0.943
      0.943
      31.25 1.3
      1.288
      1.294
      15.63 1.643
      1.615
      1.629
      7.81 1.877
      1.889
      1.883
      0 2.219
      2.233
      2.226

      Precision

      Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human SA were tested 20 times on one plate, respectively.
      Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human SA were tested on 3 different plates, 20 replicates in each plate.

        Intra-assay Precision Inter-assay Precision
      Sample 1 2 3 1 2 3
      n 20 20 20 20 20 20
      Mean (μg/mL) 23.70 66.60 228.60 23.70 61.70 207.90
      Standard deviation 1.60 3.70 12.30 1.40 2.80 11.20
      C V (%) 6.75 5.56 5.38 5.91 4.54 5.39

      Recovery

      The recovery of Human SA spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

      Sample Type Range (%) Average Recovery (%)
      Serum (n=5) 88-101 93
      EDTA plasma (n=5) 90-105 96
      Cell culture media (n=5) 86-101 93

      Linearity

      Samples were spiked with high concentrations of Human SA and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

          Serum (n=5) EDTA plasma (n=5) Cell culture media (n=5)
      1:2 Range (%) 96-110 98-112 95-112
      Average (%) 101 104 102
      1:4 Range (%) 89-102 91-105 100-112
      Average (%) 94 98 106
      1:8 Range (%) 83-94 92-102 94-105
      Average (%) 89 97 100
      1:16 Range (%) 87-102 92-103 97-109
      Average (%) 94 98 104

      Kit components & Storage

      An unopened kit can be stored at 4℃ for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.

      Item Specifications Storage
      Micro ELISA Plate(Dismountable) 8 wells ×12 strips -20℃, 6 months
      Reference Standard 2 vials
      Concentrated Biotinylated Detection Ab (100×) 1 vial, 120 μL
      Concentrated HRP Conjugate (100×) 1 vial, 120 μL -20℃(shading light), 6 months
      Reference Standard & Sample Diluent 1 vial, 20 mL 4℃, 6 months
      Biotinylated Detection Ab Diluent 1 vial, 14 mL
      HRP Conjugate Diluent 1 vial, 14 mL
      Concentrated Wash Buffer (25×) 1 vial, 30 mL
      Substrate Reagent 1 vial, 10 mL 4℃(shading light)
      Stop Solution 1 vial, 10 mL 4℃
      Plate Sealer 5 pieces
      Product Description 1 copy
      Certificate of Analysis 1 copy

      Note: All reagent bottle caps must be tightened to prevent evaporation and microbial pollution.
      The volume of reagents in partial shipments is a little more than the volume marked on the label, please use accurate measuring equipment instead of directly pouring into the vial(s).

      Other supplies required

      • Microplate reader with 450 nm wavelength filter
      • High-precision transfer pipette, EP tubes and disposable pipette tips
      • Incubator capable of maintaining 37℃
      • Deionized or distilled water
      • Absorbent paper
      • Loading slot for Wash Buffer

      Assay Procedure

      1.Add 50 μL standard or sample to each well.

      2.Immediately add 50 μL Biotinylated Detection Ab to each well.

      3.Incubate for 45 min at 37℃. Aspirate and wash 3 times.

      4.Add 100 μL HRP Conjugate to each well. Incubate for 30 min at 37℃. Aspirate and wash 5 times.

      5.Add 90 μL Substrate Reagent. Incubate for 15 min at 37℃.

      6.Add 50 μL Stop Solution.

      7.Read at 450 nm immediately. Calculation of results.

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