Description
Return measured/reference and (measured-reference)/reference as fractionalDeviation.
Geochemical normalization compares a measurement with a supplied reference or reporting basis. Ratios remove compatible units, while rescaled concentrations retain a unit; a chosen reference is an assumption rather than an independently verified material standard.
Return measured/reference and (measured-reference)/reference as fractionalDeviation.
When to use this tool
Use Geochemical Reference Deviation Factor when you need one reference-normalization or reporting-convention calculation.
How to use the tool and how it works
- Enter measured, reference. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ratio, fractionalDeviation. Use the output convention below.
Require nonzero reference. Return measured/reference and (measured-reference)/reference as fractionalDeviation.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| measured | Measured | Required. Finite number. |
| reference | Caller-supplied reference under the formula or token convention above. | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ratio | Dimensionless ratio under the numerator/denominator convention above. | Required. Finite number. |
| fractionalDeviation | Fractional Deviation | Required. Finite number. |
{
"input": {
"measured": 12,
"reference": 10
},
"output": {
"ratio": 1.2,
"fractionalDeviation": 0.2
}
}Limitations and assumptions
- Measured and reference must share units; both outputs are dimensionless and may be signed. The contract allows negative references, and no certified reference, threshold, or uncertainty is 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 complete analytical method and appropriate reference materials for interpretation. Align concentration units, dry/wet basis, detection-limit handling, and reference provenance before comparing samples.
References
Similar or alternative tools
- Trace Element Reference Gap
Return measured minus reference, that difference divided by reference, and that difference divided by the quantum.
- Element Enrichment Reference Ratio Term
Return sample and reference element/normalizer ratios and their ratio as enrichmentFactor.