Measure qualifier and quantifier ions with corrected responses. Check tolerance, blank impact, and uncertainty. Download concise ratio evidence for laboratory review records today.
| Sample | Quantifier area | Qualifier area | Target ratio | Tolerance | Observed ratio | Status |
|---|---|---|---|---|---|---|
| QC Low | 125,000 | 41,250 | 33% | 20% | 33.00% | Pass |
| Unknown A | 98,600 | 24,100 | 33% | 20% | 24.44% | Fail |
| Unknown B | 202,300 | 70,000 | 33% | 20% | 34.60% | Pass |
Blank corrected quantifier: max((Quantifier Area − Quantifier Blank) × Quantifier Factor, 0)
Blank corrected qualifier: max((Qualifier Area − Qualifier Blank) × Qualifier Factor, 0)
Internal standard normalized response: Corrected Response ÷ Internal Standard Area × Nominal Response
Ion ratio: Qualifier Response ÷ Quantifier Response × 100
Relative deviation: (Observed Ratio − Target Ratio) ÷ Target Ratio × 100
Decision rule: The result passes when deviation, blank contribution, and signal checks stay within selected limits.
Enter the quantifier and qualifier ion labels first. Add peak areas from your integration report. Include blank areas when solvent, matrix, or carryover signals are present.
Use response factors when your method applies transition correction. Select internal standard normalization when both ions should be adjusted against the same internal standard response.
Add the expected ion ratio from your validation, calibration, or reference method. Then add the permitted relative tolerance. Press Calculate to see the result above the form.
Use CSV for spreadsheet records. Use PDF for a compact report. Review failed or borderline results before making analytical decisions.
Ion ratio checking is a common confirmation step in mass spectrometry. It compares a qualifier ion with a quantifier ion. The quantifier ion gives the main response. The qualifier ion supports identity. A stable ratio helps show that the measured signal belongs to the expected compound.
Raw peak areas can include background signal. They can also include carryover or matrix noise. This calculator subtracts blank responses before ratio calculation. It also allows response factors. These factors are useful when a method corrects transition sensitivity. Internal standard normalization can also be applied. It scales both responses against the same reference signal.
The target ion ratio usually comes from validation data. It may also come from calibrators or reference injections. The observed ratio is compared with that value. The deviation is shown as a relative percentage. A result passes when the absolute deviation stays within the selected tolerance.
A good ratio is not the only requirement. The signal must be strong enough. The blank contribution should stay low. This tool adds both checks. It also shows an uncertainty range. That range helps analysts review borderline values.
Use this calculator during method checks, batch review, and confirmatory reporting. Enter integrated areas from the same retention time window. Use consistent transitions across samples. Keep target ratios aligned with your validated method. Export the report when you need a record for review, investigation, or documentation.
It is the qualifier ion response divided by the quantifier ion response, then multiplied by 100. It helps confirm compound identity.
Use integrated peak areas from the same sample, method, and retention time window. Avoid mixing smoothed and unsmoothed integrations.
Blank subtraction reduces background, carryover, and solvent contributions. This gives a cleaner ratio for confirmation review.
It is the expected qualifier-to-quantifier ratio from validation, standards, or reference injections. The observed result is compared against it.
Tolerance is the allowed relative difference from the target ratio. A lower value makes the confirmation rule stricter.
Use them when your method corrects different ion responses or transition sensitivity. Keep them at one when no correction is needed.
If the same internal standard scales both ions equally, the ratio often remains similar. It still helps document normalized responses.
No. It supports calculation and review only. Always follow your validated method, instrument procedure, and quality system requirements.
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.