NADH (340 nm) Concentration from Absorbance
Use the Beer–Lambert law to convert an absorbance reading of NADH (340 nm) into molar concentration, using its extinction coefficient (6,220 M⁻¹cm⁻¹).
- 1Beer–Lambert law A = ε·c·l
c = A/(ε·l) = 0.5/(6220×1) = 8.039e-5 mol/L
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Cite this tool
ToolJolt. NADH (340 nm) Concentration from Absorbance. ToolJolt Chemistry & Lab Tools; 2026. https://tooljolt.comA no-nonsense nadh (340 nm) concentration from absorbance built for UV-Vis spectroscopy. It shows the substituted formula, not just the answer, so you can check the working.
About NADH (340 nm) Concentration from Absorbance
Use the Beer–Lambert law to convert an absorbance reading of NADH (340 nm) into molar concentration, using its extinction coefficient (6,220 M⁻¹cm⁻¹). The calculation uses c = A / (ε · l). Why this calculation counts: The Beer–Lambert law is only linear in a window (≈0.1–1.0 absorbance). Quantitation outside it, or with the wrong extinction coefficient, silently biases every concentration you report. NADH (340 nm): ε = 6,220 M⁻¹cm⁻¹ at the stated wavelength. Common pitfalls to avoid: using a molar ε with a mass concentration; wrong path length (not 1 cm); not blanking against the correct buffer. All maths runs locally in your browser; no data is ever sent to a server. That privacy is exactly why researchers link these calculators from protocols, theses and standard operating procedures.
How to use NADH (340 nm) Concentration from Absorbance
- 1Enter your values: Absorbance (A), Molar extinction ε, Path length.
- 2Read the headline result and the supporting figures, which recompute as you type.
- 3Open “Worked example with your numbers” to see the substituted formula step by step.
- 4Copy the result, or use the cite-this-tool snippet for your methods section.
Why use NADH (340 nm) Concentration from Absorbance?
- ✓Links to related UV-Vis spectroscopy calculators so you can finish the whole workflow
- ✓Copy-ready result and a one-line “cite this tool” snippet for your methods section
- ✓Designed for analytical chemists, biochemists and QC labs who need a trustworthy answer fast
- ✓Instant, client-side result — works offline once loaded and keeps your data private
- ✓Shows the worked example step by step with your own numbers, not just a final figure
Frequently asked questions
Any tips specific to this calculation?+
NADH (340 nm): ε = 6,220 M⁻¹cm⁻¹ at the stated wavelength. Also watch out for: using a molar ε with a mass concentration and reading absorbance above ~1.0 without diluting.
Is this nadh (340 nm) concentration from absorbance free to use?+
Yes. It is completely free, needs no sign-up, and runs entirely in your browser — there are no usage limits.
What formula does it use?+
It uses c = A / (ε · l) The full worked example is shown beneath the result so you can verify each step.
What are the most common mistakes here?+
In UV-Vis spectroscopy, watch for: reading absorbance above ~1.0 without diluting; using a molar ε with a mass concentration; wrong path length (not 1 cm); not blanking against the correct buffer. This tool shows the working so you can catch these before they cost an experiment.
Does my data leave my device?+
No. All computation happens locally in your browser. Nothing you enter — sequences, concentrations or measurements — is uploaded to any server, so it is safe for confidential work.
Can I cite this tool?+
Yes — use the “Cite this tool” snippet on the page. Many users link these calculators from methods sections, lab SOPs and teaching materials.
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