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COVID-19 S-Protein (S1RBD) Human IgM Quantitative ELISA Kit

RayBio® COVID-19 S-Protein S1 Receptor Binding Domain Human Antibody Detection Kit (Indirect ELISA method) for the quantitative measurement of human IgM antibody against SARS-CoV-2 in serum or dried blood. This ELISA kit is for research use only, not for therapeutic or diagnostic applications.


Antigen Information

Gene Symbols:
  • IGM

Assay Format

Number of Targets Detected:
Species Detected:
  • Human
Compatible Sample Types:
  • Dried Blood
  • Serum
Design Principle:
  • Indirect
Method of Detection:
  • Quantitative
Solid Support:
96-well Microplate

Product Specifications

1, 2, or 5 x 96-Well Strip Microplate Kit

Application Notes

Kit Components
  • SARS-CoV-2 S-protein S1RBD coated 96-well microplate
  • Albumin protein coated 96 well-Microplate
  • Wash Buffer
  • Positive Control
  • Biotinylated Anti-Human IgM
  • HRP-Streptavidin concentrate
  • TMB One-Step Substrate
  • Stop Solution
  • Assay Diluent
  • 5X Sample Diluent
  • 1X PBS (DBS version)
  • Tween-20 (DBS version)
  • Protease Inhibitor Cocktail (DBS version)
Other Materials Required
  • Microplate reader capable of measuring absorbance at 450 nm
  • Precision pipettes to deliver 2 µl to 1 ml volumes
  • Adjustable 1-25 ml pipettes for reagent preparation
  • 100 ml and 1 liter graduated cylinders
  • Absorbent paper
  • Distilled or deionized water
Protocol Outline
  1. Prepare all reagents, samples and standards as instructed.
  2. Add 100 μl positive control, negative control, or sample to each well. Incubate 1.5 hours at room temperature.
  3. Add 100 μl prepared HRP-anti positive control IgM Antibody and/or 100 μl of prepared HRP-anti Human IgM Antibody to each well. Incubate 1 hour at room temperature.
  4. Add 100 µl TMB One-Step Substrate Reagent to each well. Incubate 10 minutes at room temperature.
  5. Add 50 µl Stop Solution to each well. Read at 450 nm immediately.


The entire kit may be stored at -20°C for up to 1 year from the date of shipment. Avoid repeated freeze-thaw cycles. For extended storage, it is recommended to store at -80°C.

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Blood Collection Kit Bundle

Get 50% off 50 PanoHealth® Blood Collection Kits when you bundle it with this product.
Total list price $1,478.50
Price for all $948.00


This product is furnished for LABORATORY RESEARCH USE ONLY.
Not for diagnostic or therapeutic use.