Description
Allocate one composite-sample aliquot by a supplied flow weight.
Composite sampling allocates a target volume across represented intervals using a declared weight basis. A weight may need flow integrated over time rather than a single flow reading, depending on the design. A local proportional aliquot is one part of a sampling plan, not verification of representativeness or analytical suitability.
Allocate one composite-sample aliquot by a supplied flow weight.
When to use this tool
Use Composite Sample Flow Proportional Aliquot when you already have targetCompositeVolume, intervalFlowWeight, totalFlowWeight and need to allocate one composite-sample aliquot by a supplied flow weight.
How to use the tool and how it works
- Enter targetCompositeVolume, intervalFlowWeight, totalFlowWeight. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read aliquotVolume. Use the output convention below.
Require target volume>=0, totalFlowWeight>0 and interval weight within total; return target*(intervalWeight/totalWeight).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| targetCompositeVolume | Target Composite Volume | Required. Finite number; minimum 0. |
| intervalFlowWeight | Nonnegative time-supported flow weight in the same basis as totalFlowWeight; do not mix unequal-duration raw rates without weighting. | Required. Finite number; minimum 0. |
| totalFlowWeight | Total Flow Weight | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| aliquotVolume | Aliquot Volume | Required. Finite number. |
{
"input": {
"targetCompositeVolume": 1000,
"intervalFlowWeight": 30,
"totalFlowWeight": 120
},
"output": {
"aliquotVolume": 250
}
}Limitations and assumptions
- Weights must use a consistent basis and time support; no actual flow, complete sample, analyte validity or appropriate sampling protocol is determined.
- 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 actual flow record, interval durations and complete sampling design to construct a composite. Reconcile all aliquots and analytical requirements; one proportional allocation does not validate the full sample or select a protocol.
References
Similar or alternative tools
- Precipitation Basin Area Weight
Calculate one subarea's precipitation contribution to a supplied basin mean.
- Dissolution Aliquot Replacement Factor
Calculate remaining-volume fraction and replacement-to-remaining ratio for one aliquot.