Description
Return sample and background on a shared supplied basis.
Atmospheric analytical quantities require explicit sample/background, mole, charge, reference-pressure and reporting bases. A ratio or balance can be consistent numerically without establishing actual composition, sample representativeness, source identity or a health/regulatory interpretation.
Return sample and background on a shared supplied basis.
When to use this tool
Use Tracer Background Unit Basis when checking the stated atmospheric chemical measurement, composition or amount convention.
How to use the tool and how it works
- Enter observed, observedToBase, background, backgroundToBase. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read observedBase, backgroundBase, netBase. Use the output convention below.
Return sample and background on a shared supplied basis. Require positive observed/background conversion factors; observedBase = observed*factor, backgroundBase = background*factor, netBase subtracts them.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observed | Observed | Required. Finite number. |
| observedToBase | Observed To Base | Required. Finite number; strictly above 0. |
| background | Background | Required. Finite number. |
| backgroundToBase | Background To Base | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| observedBase | Observed Base | Required. Finite number. |
| backgroundBase | Background Base | Required. Finite number. |
| netBase | Net Base | Required. Finite number. |
{
"input": {
"observed": 10,
"observedToBase": 2,
"background": 3,
"backgroundToBase": 4
},
"output": {
"observedBase": 20,
"backgroundBase": 12,
"netBase": 8
}
}Limitations and assumptions
- Signed values are retained; matching units, sample identity and analytical validity are not verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use calibrated analytical data, compatible units and complete sampling/speciation information; consult appropriate environmental professionals for exposure or regulatory decisions.
References
Similar or alternative tools
- Emission Ratio Background Adjusted Pair
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- Denuder Capture Background Correction Term
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