IORE.solution {mkin} | R Documentation |
Function describing exponential decline from a defined starting value, with a concentration dependent rate constant.
IORE.solution(t, parent.0, k__iore, N)
t |
Time. |
parent.0 |
Starting value for the response variable at time zero. |
k__iore |
Rate constant. Note that this depends on the concentration units used. |
N |
Exponent describing the nonlinearity of the rate equation |
The value of the response variable at time t
.
The solution of the IORE kinetic model reduces to the
SFO.solution
if N = 1.
The parameters of the IORE model can be transformed to equivalent parameters
of the FOMC mode - see the NAFTA guidance for details.
NAFTA Technical Working Group on Pesticides (not dated) Guidance for Evaluating and Calculating Degradation Kinetics in Environmental Media
plot(function(x) IORE.solution(x, 100, 0.2, 1.3), 0, 2, ylim = c(0, 100)) fit.fomc <- mkinfit("FOMC", FOCUS_2006_C, quiet = TRUE) fit.iore <- mkinfit("IORE", FOCUS_2006_C, quiet = TRUE) fit.iore.deS <- mkinfit("IORE", FOCUS_2006_C, solution_type = "deSolve", quiet = TRUE) print(data.frame(coef(fit.fomc), coef(fit.iore), coef(fit.iore.deS), row.names = paste("model par", 1:3))) print(rbind(fomc = endpoints(fit.fomc)$distimes, iore = endpoints(fit.iore)$distimes, iore.deS = endpoints(fit.iore)$distimes))