Assay type: Sandwich
Format: 96T
Assay time: 3.5h
Detection: range 0.39-25 ng/mL
Sensitivity: 0.09 ng/mL
Sample type: &Sample volume human serum, plasma, and other biological fluids; 100μL
Specificity: This kit recognizes Human S1RBD in samples. No significant cross-reactivity or interference between Human S1RBD and analogs: was observed.
Reproducibility: Both intra-CV and inter-CV are < 10%.
Application: This ELISA kit applies to the in vitro quantitative determination of Human S1RBD concentrations in human serum, plasma, and other biological fluids.

This ELISA kit uses the Sandwich-ELISA principle. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific for human S1RBD (Capture Ab: E-AB-V1003; Detection Ab: [conjugated biotin] E-AB-V1002; Antigen: PKSR030477;).

The standards or samples are added to the wells of the micro ELISA plate and combined with the specific antibody. Next, a biotinylated detection antibody specific for human S1RBD and avidin-horseradish peroxidase (HRP) conjugate are successively added to each microwell of the plate and incubated. Free components are removed by washing.


The substrate solution is added to each well. Only wells containing human S1RBD, biotinylated detection antibody, and avidin-HRP conjugate will appear blue. The enzyme-substrate reaction is terminated with the addition of stop solution and the color turns yellow. Optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm.

The OD value is proportional to the concentration of human S1RBD. You can calculate the concentration of human S1RBD in the samples by comparing the OD of the samples with the standard curve.

  • Kit components and storage

An unopened kit can be stored at 2-8 ℃ for 1 month. If the kit is not supposed to be used within 1 month, please store the components separately according to the following conditions upon receipt of the kit.

Item Specifications Storage
Micro ELISA Plate(Dismountable) 96T: 8 wells ×12 strips
48T: 8 wells ×6 strips
-20℃, 6 months
Reference Standard 96T: 2 vials
48T: 1 vial
Concentrated Biotinylated Detection Ab (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
Concentrated HRP Conjugate (100×) 96T: 1 vial, 120 μL
48T: 1 vial, 60 μL
-20℃(Protect from light), 6 months
Reference Standard & Sample Diluent 1 vial, 20 mL 2-8°C, 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 2-8℃(Protect from light)
Stop Solution 1 vial, 10 mL 2-8°C
Plate Sealer 5 pieces
Manual 1 copy
Certificate of Analysis 1 copy


Intra-assay Precision (Precision within an assay): 3 samples with low, mid-range, and high-level Human S1RBD were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid-range, and high-level Human S1RBD were tested on 3 different plates, 20 replicates in each plate.