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Human S100B(S100 Calcium Binding Protein B) ELISA Kit

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Price:   $495
Cat Number:  E-EL-H1297
Lead Time:   7~10 days

Reactivity:  Human

Detection Range:  31.25~2000 pg/mL

Sensitivity:  18.75 pg/mL

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Intended use

This ELISA kit applies to the in vitro quantitative determination of Human S100B concentrations in serum, plasma and other biological fluids.

Test principle

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human S100B. Standards or samples are added to the micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human S100B and Avidin-Horseradish Peroxidase (HRP) conjugate are added successively to each micro plate well and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human S100B, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by the addition of stop solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human S100B. You can calculate the concentration of Human S100B in the samples by comparing the OD of the samples to the standard curve.

Assay type Sandwich-ELISA
Format 96T/48T
Assay time 3.5h
Reactivity Human
Detection Method Colormetric
Detection Range 31.25—2000 pg/mL
Sensitivity 18.75 pg/mL
Sample Volume Required Per Well 100μL
Sample Type serum, plasma and other biological fluids

Specificity

This kit recognizes Human S100B in samples. No significant cross-reactivity or interference between Human S100B 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
(pg/mL)
O.D Average Corrected
2000 2.382
2.43
2.406 2.319
1000 1.704
1.752
1.728 1.641
500 0.966
0.95
0.958 0.871
250 0.507
0.513
0.51 0.423
125 0.277
0.249
0.263 0.176
62.5 0.196
0.18
0.188 0.101
31.25 0.135
0.143
0.139 0.052
0 0.084
0.09
0.087 --

Precision

Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human S100B were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human S100B 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 (pg/mL) 104.40 168.30 729.10 107.50 175.90 681.00
Standard deviation 7.10 7.70 25.50 5.80 8.30 32.00
C V (%) 6.80 4.58 3.50 5.40 4.72 4.70

Recovery

The recovery of Human S100B 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) 86-98 93
EDTA plasma (n=5) 93-108 100
Cell culture media (n=5) 95-112 102

Linearity

Samples were spiked with high concentrations of Human S100B 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 (%) 90-105 88-98 89-101
Average (%) 96 93 95
1:4 Range (%) 98-115 85-97 92-104
Average (%) 106 90 98
1:8 Range (%) 99-112 87-101 94-110
Average (%) 104 93 101
1:16 Range (%) 98-112 81-95 94-106
Average (%) 104 87 100

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 100 μL standard or sample to each well. Incubate for 90 min at 37℃.

2.Remove the liquid.

3.Add 100 μL Biotinylated Detection Ab. Incubate for 1 hour at 37℃. Aspirate and wash 3 times.

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

5.Add 90 μL of 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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