Description
Subtract blankConcentration from measuredConcentration, then multiply by dilution factor and digest volume and divide by sample mass.
Geochemical mass calculations distinguish wet sample, dry sample, ash, digest, and crucible-inclusive measurements. Moisture fractions and dilution factors change the reporting basis; they do not establish recovery, analyte retention, or laboratory accuracy.
Subtract blankConcentration from measuredConcentration, then multiply by dilution factor and digest volume and divide by sample mass.
When to use this tool
Use Rock Powder Dilution Blank Correction when you need an explicit sample-mass or concentration-basis calculation.
How to use the tool and how it works
- Enter measuredConcentration, blankConcentration, dilutionFactor, digestVolume, sampleMass. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read blankCorrected, sampleConcentration. Use the output convention below.
Require positive dilutionFactor, digestVolume, and sampleMass. Subtract blankConcentration from measuredConcentration, then multiply by dilution factor and digest volume and divide by sample mass.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measuredConcentration | Measured Concentration | Required. Finite number. |
| blankConcentration | Blank Concentration | Required. Finite number. |
| dilutionFactor | Positive factor multiplying the blank-corrected digest concentration. | Required. Finite number; strictly above 0. |
| digestVolume | Digest Volume | Required. Finite number; strictly above 0. |
| sampleMass | Sample Mass | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| blankCorrected | Blank Corrected | Required. Finite number. |
| sampleConcentration | Blank-corrected analyte mass per sample mass with dimensionally compatible inputs. | Required. Finite number. |
{
"input": {
"measuredConcentration": 12,
"blankConcentration": 2,
"dilutionFactor": 5,
"digestVolume": 0.1,
"sampleMass": 0.01
},
"output": {
"blankCorrected": 10,
"sampleConcentration": 500
}
}Limitations and assumptions
- Concentrations, volume, and mass must be dimensionally compatible so the result is analyte mass per sample mass. A negative blank-corrected result is retained; no detection-limit substitution, digestion recovery, or uncertainty correction is applied.
- 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
Check the analytical preparation and measurement records for blanks, recovery, moisture, and mass basis. Use the laboratory's validated procedure for actual sample interpretation.
References
Similar or alternative tools
- Geochemical Dry Wet Concentration Crosswalk
Return solidsFraction as one minus water fraction and dryConcentration as wetConcentration divided by solidsFraction.
- Geochemical Dryash Basis Flag
When reportAshBasis is true, divide dryBasisConcentration by ashFraction and return the reciprocal factor; otherwise retain the dry-basis value with factor one.