Function describing the solution of the differential equations describing the kinetic model with first-order terms for a two-way transfer from a free to a bound fraction, and a first-order degradation term for the free fraction. The initial condition is a defined amount in the free fraction and no substance in the bound fraction.

SFORB.solution(t, parent.0, k_12, k_21, k_1output)

## Arguments

t Time. Starting value for the response variable at time zero. Kinetic constant describing transfer from free to bound. Kinetic constant describing transfer from bound to free. Kinetic constant describing degradation of the free fraction.

## Value

The value of the response variable, which is the sum of free and bound fractions at time t.

## References

FOCUS (2006) “Guidance Document on Estimating Persistence and Degradation Kinetics from Environmental Fate Studies on Pesticides in EU Registration” Report of the FOCUS Work Group on Degradation Kinetics, EC Document Reference Sanco/10058/2005 version 2.0, 434 pp, http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics

## Examples

  plot(function(x) SFORB.solution(x, 100, 0.5, 2, 3), 0, 2)