AffiELISA® Pan THFA Kit: Ultra-High Tetrahydrofolic Acid ELISA Detection

The AffiELISA® Pan THFA Kit uses competitive inhibition enzyme immunoassay technique. The provided microtiter plate comes pre-coated with Tetrahydrofolic Acid (THFA) protein. To perform the assay, standards or samples are added to designated wells on the microtiter plate. Subsequently, a biotin-conjugated antibody specific to Tetrahydrofolic Acid (THFA) is introduced. Avidin conjugated to Horseradish Peroxidase (HRP) is then added to each well, followed by an incubation period. Afterward, the TMB substrate solution is added, initiating an enzyme-substrate reaction. To conclude the reaction, a sulphuric acid solution is introduced, causing a color change that can be measured spectrophotometrically at a wavelength of 450nm ± 10nm. By comparing the optical density (OD) of the samples to the standard curve, the concentration of Tetrahydrofolic Acid (THFA) in the samples can be determined.