Bioaccumulation Kinetic Calculator
Conditional actual biota uptake/depuration kinetics C(t)=k1Cwater/k2+(C0−steady) exp(−k2t), constant actual water concentration, no growth/diet input. Distinct from equilibrium BCFalone; externally fitted rates and population applicability required, no observed future concentration.
Description
A one-compartment biota model balances uptake and depuration under constant ambient concentration.
A one-compartment biota model balances uptake and depuration under constant ambient concentration.1
Independently fitted rates and initial concentration determine the modeled trajectory.
When to use Bioaccumulation Kinetic Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
How to use Bioaccumulation Kinetic Calculator and understand its results
- Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
- Enter callerIndependentlyFittedUptakeRate, callerIndependentlyFittedDepurationRatePerDay, actualAmbientConcentration, actualInitialBiotaConcentration, elapsedDays, using the field meanings and rules below, then run the tool.
- Read result.conditionalOneCompartmentBiotaConcentration. Use the units and subtraction order below to interpret each value; retain negative differences where returned.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerIndependentlyFittedUptakeRate | Caller independently fitted uptake rate | number | Required |
| callerIndependentlyFittedDepurationRatePerDay | Caller independently fitted depuration rate per day | number | Required |
| actualAmbientConcentration | Actual ambient concentration | number | Required |
| actualInitialBiotaConcentration | Actual initial biota concentration | number | Required |
| elapsedDays | Elapsed days | number | Required |
Require nonnegative uptake coefficient, ambient concentration, initial tissue concentration and elapsed days, with a positive depuration rate constant. Compute the steady state and exponential approach from the initial value. The caller supplies compatible rate/concentration units and applicability of constant ambient concentration.
steadyState=k1×ambient/k2; tissueAtTime=steadyState+(initial−steadyState)×exp(−k2×days) Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.conditionalOneCompartmentBiotaConcentration | Modeled concentration at elapsed time under the supplied uptake/depuration model. | number |
{
"input": {
"callerIndependentlyFittedUptakeRate": 2,
"callerIndependentlyFittedDepurationRatePerDay": 1,
"actualAmbientConcentration": 3,
"actualInitialBiotaConcentration": 1,
"elapsedDays": 1
},
"output": {
"result": {
"conditionalOneCompartmentBiotaConcentration": 4.160602794142788
}
}
}Limitations and assumptions
Chemical identity, route, assay, exposure basis and reference applicability are caller-established. The output supplies no causal conclusion, universal toxicity threshold or authoritative regulatory determination.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use One-Compartment AUC Calculator: A one-compartment exponential model describes concentration decline using an initial concentration and elimination rate. For a complementary comparison, use Maintenance Dose Calculator: A maintenance-mass scenario relates a clinician-established average concentration target to clearance, interval and bioavailability.
References
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Bioaccumulation Kinetic Calculator — tool.io
Similar or alternative tools
- One-Compartment AUC Calculator
A one-compartment exponential model describes concentration decline using an initial concentration and elimination rate.
- Maintenance Dose Calculator
A maintenance-mass scenario relates a clinician-established average concentration target to clearance, interval and bioavailability.