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PAH Benzo[a]pyrene-Equivalent Calculator — result sheet
Combine polycyclic aromatic hydrocarbon concentrations with a documented toxic-equivalency factor list and show the weighted benzo[a]pyrene-equivalent total.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: For each analyte, benzo[a]pyrene-equivalent contribution = measured concentration × toxic equivalency factor; total equivalent concentration = sum of all contributions.
Mixture calculations are easy to obscure when a list of compounds becomes one number. This page keeps names, concentrations, factors, weighted contributions, and the largest contributor in one table. It is designed for documented equivalence scenarios and does not turn a concentration-equivalence result into a cancer-risk or regulatory conclusion.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Compound names, in matching order
- Concentrations, in the same order
- Toxic equivalency factors, in the same order
Worked example
| Input | Value |
|---|---|
| Compound names, in matching order | Benzo[a]anthracene, Benzo[b]fluoranthene, Benzo[a]pyrene |
| Concentrations, in the same order | 0.1,0.2,0.05 |
| Toxic equivalency factors, in the same order | 0.1,0.1,1 |
The weighted contributions are 0.01, 0.02, and 0.05, giving a benzo[a]pyrene-equivalent concentration of 0.08 in the input concentration unit.
Assumptions and limits
- Names, concentrations, and factors are entered in matching order and contain the same number of entries.
- All concentrations use one consistent unit and the output carries that same concentration unit.
- The factor list is supplied by the user for the chosen study, authority, or scenario; the calculator does not select a universal factor set.
- Each contribution is calculated independently and then added without interaction, degradation, or uncertainty modeling.
- A zero total reports zero dominant share and does not imply absence of analytical uncertainty.
- The output is an equivalence worksheet, not a dose-response model, cleanup target, or legal determination.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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