Description
Return blank difference on a supplied reference 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 blank difference on a supplied reference basis.
When to use this tool
Use Blank Signal Normalized Difference when checking the stated atmospheric chemical measurement, composition or amount convention.
How to use the tool and how it works
- Enter signal, blank, suppliedReference. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read difference, normalizedDifference. Use the output convention below.
Return blank difference on a supplied reference basis. Require suppliedReference != 0; difference = signal-blank, normalizedDifference = difference/reference.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| signal | Signal | Required. Finite number. |
| blank | Blank | Required. Finite number. |
| suppliedReference | Supplied Reference | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| difference | Difference | Required. Finite number. |
| normalizedDifference | Normalized Difference | Required. Finite number. |
{
"input": {
"signal": 10,
"blank": 2,
"suppliedReference": 4
},
"output": {
"difference": 8,
"normalizedDifference": 2
}
}Limitations and assumptions
- Reference may be signed; units, calibration, significance and environmental interpretation are not inferred.
- 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
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