Description
Return netMass = grossMass-blankMass, loading = netMass/(wipedArea*recovery) and reportingMass = loading*reportingArea.
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.
Return netMass = grossMass-blankMass, loading = netMass/(wipedArea*recovery) and reportingMass = loading*reportingArea.
When to use this tool
Use Indoor Dust Surface Area Normalizer when checking a supplied measurement correction, comparison or calibration term.
How to use the tool and how it works
- Enter grossMass, blankMass, wipedArea, recovery, reportingArea. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read netMass, loading, reportingMass. Use the output convention below.
Require positive wipedArea, recovery in (0,1] and nonnegative reportingArea. Return netMass = grossMass-blankMass, loading = netMass/(wipedArea*recovery) and reportingMass = loading*reportingArea. recovery is a fraction, not percent; areas use one unit and masses another common unit.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| grossMass | Gross Mass | Required. Finite number. |
| blankMass | Blank Mass | Required. Finite number. |
| wipedArea | Wiped Area | Required. Finite number; strictly above 0. |
| recovery | Recovery | Required. Finite number; maximum 1; strictly above 0. |
| reportingArea | Reporting Area | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| netMass | Net Mass | Required. Finite number. |
| loading | Loading | Required. Finite number. |
| reportingMass | Reporting Mass | Required. Finite number. |
{
"input": {
"grossMass": 12,
"blankMass": 2,
"wipedArea": 100,
"recovery": 0.8,
"reportingArea": 10
},
"output": {
"netMass": 10,
"loading": 0.125,
"reportingMass": 1.25
}
}Limitations and assumptions
- Negative net mass and loading remain signed. The correction assumes recovery applies to the net collected amount; it does not validate the wipe method, contamination extent or any action level.
- 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
- Particulate Filter Tare Mass Balance
Return netMass = loadedMass-tareMass-blankCorrection and concentration = netMass/sampledVolume.
- Air Sample Duration Share Tool
Calculate air sample duration share from explicit caller-supplied inputs.