Analyze peak spacing, widths, and theoretical plate impact. Get instant outputs, exports, and interpretation notes. Plan cleaner separations with practical, chemistry-ready calculations and examples.
| Example | Method | Key Inputs | Result | Reading |
|---|---|---|---|---|
| Mixture A | Baseline width | tR1 = 2.10, tR2 = 2.78, w1 = 0.22, w2 = 0.24 | Rs = 2.9565 | Strong separation |
| Mixture B | Half-height | tR1 = 4.15, tR2 = 4.61, w0.5,1 = 0.12, w0.5,2 = 0.13 | Rs = 2.1712 | Strong separation |
| Mixture C | Master equation | N = 8000, α = 1.25, k′₂ = 4.00 | Rs = 3.5777 | Strong separation |
Baseline width equation: Rs = 2(tR2 − tR1) / (w1 + w2)
Half-height equation: Rs = 1.18(tR2 − tR1) / (w0.5,1 + w0.5,2)
Master resolution equation: Rs = (√N / 4) × ((α − 1) / α) × (k′₂ / (1 + k′₂))
Higher resolution means peaks are more clearly separated. Around 1.5 is commonly used as a practical target for baseline separation.
HD resolution helps you judge how well two chemical peaks separate. It is a practical measure in chromatography. A higher value means cleaner peak spacing. That improves identification, quantification, and method confidence. Low resolution often causes overlap. Overlap can hide impurities or distort concentration results.
This calculator supports three useful paths. The first uses baseline peak widths. The second uses half-height widths. The third uses the master resolution equation. That advanced option links separation quality with plate count, selectivity, and retention. It helps you see which variable limits performance most strongly.
Resolution below 1.0 often signals poor separation. Values between 1.0 and 1.5 show partial separation. A value near 1.5 is a common target. It often suggests baseline separation is possible. Higher values usually mean stronger peak spacing and more reliable integration. Still, practical method review remains important.
You can improve resolution in several ways. Increase column efficiency if possible. Improve selectivity by changing the stationary phase or mobile phase conditions. Adjust retention so peaks spend enough time separating. In real work, selectivity often gives the biggest gain. Small selectivity changes can produce large resolution improvements.
Use the baseline equation when full peak widths are available. Use the half-height method when that width format is reported by your software. Use the master equation during planning and troubleshooting. It is useful for method development. It also helps compare scenarios before running new experiments.
The CSV option supports reporting and audit trails. The PDF option is helpful for lab notes and quick sharing. The example table shows realistic chemistry-style input patterns. That makes the page easier to validate. It also helps students and analysts learn how each variable changes the final separation result.
Here it means high-detail separation resolution for chemical peaks. The calculator focuses on chromatography-style resolution, not display pixels or screen formats.
A value near 1.5 is often used as a practical target. It usually suggests the peaks are separated well enough for reliable reading under common conditions.
Use it when your chromatographic software or manual measurements provide full baseline widths for both peaks. It is a direct and common calculation path.
Use the half-height method when your system reports widths at half height instead of baseline widths. It is often convenient for fast software-based comparison.
It shows how plate count, selectivity, and retention work together. That makes it useful for method development, troubleshooting, and optimization planning.
The resolution equations use the spacing between two ordered peaks. Peak 2 should be the later-eluting peak so the time difference stays positive and meaningful.
Yes. Any consistent time unit works. Just keep all related retention times and widths in the same unit during a single calculation.
Start by checking selectivity, efficiency, and retention. In many cases, small selectivity changes can improve separation more strongly than simple run-time changes.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.