COVID-19 Human IgA ELISA Kit

RayBio® COVID-19 N and S1 RBD protein Human Antibody Detection Kit (Indirect ELISA method) for the quantitative measurement of human IgA antibody against SARS-CoV-2 in serum. This Product is for Research Use Only. Not for use in in vitro diagnostics.


Assay Format

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

Product Specifications

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

Protein Information

Gene Symbols:
  • IGA

Application Notes

Kit Components
  • SARS-CoV-2 N-protein coated 96-well microplate
  • Wash Buffer
  • Positive Control
  • Negative Control
  • HRP-anti positive control IgA Antibody
  • HRP-anti Human IgA Antibody
  • TMB One-Step Substrate
  • Stop Solution
  • Assay Diluent
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 IgA Antibody and/or 100 μl of prepared HRP-anti Human IgA 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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This product is furnished for LABORATORY RESEARCH USE ONLY.
Not for diagnostic or therapeutic use.