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TMB Across the Main ELISA Formats
TMB is a versatile HRP indicator used in all common ELISA formats:
Sandwich ELISA — capture + detection antibody; TMB signal depends on robust, low-background development.
Direct / Indirect ELISA — antigen or antibody coated directly; TMB gives clear positive/negative separation.
Competitive ELISA — signal inversely related to analyte; a wide dynamic range helps accuracy.
Beyond microwell ELISA, Durastab™ also offers TMB formulations for membrane blotting, Western blot, immunohistochemistry and chip/microarray assays, including precipitating and chip-optimized variants. These extend the same HRP detection chemistry to additional lab and IVD platforms.
Sensitivity, Dynamic Range and Choosing a Variant
Dynamic range is especially important when an assay must quantitate a large range of analyte concentrations. For assays targeting low-concentration analytes, High Sensitive gives a strong, fast signal. For standard curves spanning a wide range, Board Range and Slow Plus extend the linear window and make endpoint timing forgiving — supporting reliable quantitation and fewer re-runs for out-of-range samples.
Performance Data That Matters for Kit Development
Low background & high signal — Durastab™ TMB series is built for a superior signal-to-noise ratio.
Batch-to-batch consistency — activity of multiple production batches is verified under graded HRP concentrations by direct ELISA.
Stability — up to 4-year shelf life and >1-year open-vial stability at 2–8 °C support real kit logistics.
Scale — single-batch production up to 1950 L supports consistent supply for IVD manufacturers.
Designing a Reliable TMB Step
Choose your substrate variant by assay sensitivity/range needs.
Optimize development time against signal and background.
Stop consistently and read within the recommended window.
Validate storage and freeze-thaw handling — consider -F variants for cold-chain exposure.
