MTT Assay
Colorimetric assay for assessing cell viability and proliferation.
O que é MTT-ASSAY
Uma técnica de análise avançada
Colorimetric assay for assessing cell viability and proliferation.
What sets us apart
We don't hand over a spectrum. We hand over the interpretation.
Any lab can return peaks and numbers. Our report reads the data. Three differences define what we deliver — illustrated below with a real, anonymized case.
Multiple techniques, one integrated report
We don't hand back five loose reports. We cross-reference every technique's results into a single reading — each signal checked against the others — to reach an answer, not a pile of data.
- Contamination investigation — identifying and tracing the source of a foreign species.
- Performance degradation — explaining why a batch behaves outside expectations.
- New supplier validation — proving equivalence before switching.
3 LDPE batches · 4 techniques converge, NMR reveals the difference
In semicrystalline polymer systems, thermomechanical processing variables influence chain conformational dynamics¹. Solid-state NMR resolves chemical environments at the nanometer scale², sensitive to changes not detectable by XRD or FTIR³.
Technical justification anchored in the literature
Every technique choice and every inference in the report is backed by peer-reviewed literature — with citations in the text. The conclusion isn't loose opinion: it's a traceable argument, defensible in an audit and in front of the client.
- Numbered citations linking claim to source
- Official standards and methods referenced per analyte
- Auditable reasoning end to end
Conclusion and expert opinion
The report closes with a clear position, signed by the Principal Investigator: what the data shows, what can't yet be claimed, and the next step. It includes an honest caveat on the limits of inference — what separates a technical opinion from a guess.
- Explicit technical position, not just results
- Inference limits declared honestly
- Next-step recommendation signed by the P.I.
Four techniques confirmed equivalence; only the solid-state NMR revealed the subtle conformational change not distinguishable by conventional QC — a molecular signature consistent with the atypical filtration behavior.
Without the industrial line's parameters, no direct causal correlation can be established — a complementary step is recommended for elucidation.
Aplicações de mercado
Onde a MTT-ASSAY entrega resultados
Aplicações de mercado
FAQ
Frequently Asked Questions about the MTT Assay
How does the MTT assay actually work?
- MTT is a yellow tetrazolium salt that metabolically active cells reduce, via mitochondrial dehydrogenase enzymes, into purple insoluble formazan crystals. After solubilizing the crystals, the intensity of the resulting color is measured spectrophotometrically and is proportional to the number of viable, metabolically active cells.
What can interfere with MTT assay results?
- Compounds that are themselves colored, that directly reduce the tetrazolium salt independent of cellular metabolism, or that interfere with mitochondrial enzyme activity without actually killing the cell can all produce a misleading signal — a known limitation that is accounted for with appropriate controls when testing colored or redox-active test compounds.
Is MTT a measure of cell number, cell viability, or cell proliferation?
- MTT signal correlates with the number of metabolically active cells, so it is commonly used as a proxy for all three, but strictly speaking it measures mitochondrial dehydrogenase activity — a change in per-cell metabolic activity (without a change in cell number) can shift the MTT signal independent of actual proliferation or death.
How long does an MTT assay take?
- A typical MTT assay involves incubating cells with the test compound, then adding the MTT reagent for a further incubation period (commonly 1-4 hours) to allow formazan formation, followed by solubilization and spectrophotometric reading — the full protocol is usually completed within the same day after the initial compound exposure period.
Why is MTT still widely used despite having several newer alternatives?
- MTT remains popular because it is inexpensive, technically simple, requires only a standard spectrophotometer (no specialized luminometer or flow cytometer), and has decades of published reference data across countless cell types and compounds, making results easy to benchmark against the existing literature.
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