Description
Convert commonBasisValue = reportedConcentration*sourceBasisFactor and referenceBasisValue = suppliedReferenceValue*referenceBasisFactor, then return gap = commonBasisValue-referenceBasisValue.
Environmental measurements can require background subtraction, recovery correction, calibration or a common reference basis. Corrected values can be signed; a numerical correction is separate from detection, analytical validity and health interpretation.
Convert commonBasisValue = reportedConcentration*sourceBasisFactor and referenceBasisValue = suppliedReferenceValue*referenceBasisFactor, then return gap = commonBasisValue-referenceBasisValue.
When to use this tool
Use Environmental Source Basis Gap when checking a supplied measurement correction, comparison or calibration term.
How to use the tool and how it works
- Enter reportedConcentration, sourceBasisFactor, referenceBasisFactor, suppliedReferenceValue. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read commonBasisValue, referenceBasisValue, gap. Use the output convention below.
Require positive sourceBasisFactor and referenceBasisFactor. Convert commonBasisValue = reportedConcentration*sourceBasisFactor and referenceBasisValue = suppliedReferenceValue*referenceBasisFactor, then return gap = commonBasisValue-referenceBasisValue.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| reportedConcentration | Reported Concentration | Required. Finite number. |
| sourceBasisFactor | Source Basis Factor | Required. Finite number; strictly above 0. |
| referenceBasisFactor | Reference Basis Factor | Required. Finite number; strictly above 0. |
| suppliedReferenceValue | Supplied Reference Value | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| commonBasisValue | Common Basis Value | Required. Finite number. |
| referenceBasisValue | Reference Basis Value | Required. Finite number. |
| gap | Signed first or corrected value minus the stated reference, on their common unit basis. | Required. Finite number. |
{
"input": {
"reportedConcentration": 2,
"sourceBasisFactor": 3,
"referenceBasisFactor": 2,
"suppliedReferenceValue": 2
},
"output": {
"commonBasisValue": 6,
"referenceBasisValue": 4,
"gap": 2
}
}Limitations and assumptions
- Both factors must convert their respective inputs to the same final unit and wet/dry, reference-state or normalization basis. Signed values are accepted; no conversion factors, standards or safe levels are automatically selected.
- 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 the relevant analytical method, quality-control records and uncertainty model before classifying a corrected measurement.
References
Similar or alternative tools
- Reporting Limit Reference Gap
Return gap = reportedLimit-referenceLimit and, when referenceLimit > 0, ratio = reportedLimit/referenceLimit with defined = true.
- Household Exposure Unit Factor
unitFactor must be target units per source unit, including any required scale conversion.