Estimation of the transpiration stream concentration factor

The FOCUS groundwater guidance (FOCUS 2014, p. 41) states that a reliable measured log Kow for neutral pH must be available in order to apply the Briggs equation. It is not clarified when it can be regarded reliable, but the @@ -122,60 +61,62 @@ the compound should not be ionogenic (weak acid/base) or ionic.

TSCF(log_Kow, method = c("briggs82", "dettenmaier09"))

Usage

TSCF(log_Kow, method = c("briggs82", "dettenmaier09"))

Arguments

- - - - - - - - - - -

log_Kow	The decadic logarithm of the octanol-water partition constant
method	Short name of the estimation method.

Arguments

log_Kow: The decadic logarithm of the octanol-water partition constant
method: Short name of the estimation method.

Details

The Dettenmaier equation is given to show that other views on the subject exist.

References

FOCUS (2014) Generic Guidance for Tier 1 FOCUS Ground Water Assessments. Version 2.2, May 2014 Dettenmaier EM, Doucette WJ and Bugbee B (2009) Chemical hydrophobicity and uptake by plant roots. Environ. Sci. Technol 43, 324 - 329

Examples

plot(TSCF, -1, 5, xlab = "log Kow", ylab = "TSCF", ylim = c(0, 1.1))
TSCF_2 <- function(x) TSCF(x, method = "dettenmaier09")
-curve(TSCF_2, -1, 5, add = TRUE, lty = 2)
legend("topright", lty = 1:2, bty = "n",
-  legend = c("Briggs et al. (1982)", "Dettenmaier et al. (2009)"))

- -

Examples

plot(TSCF, -1, 5, xlab = "log Kow", ylab = "TSCF", ylim = c(0, 1.1))
+
+TSCF_2 <- function(x) TSCF(x, method = "dettenmaier09")
+curve(TSCF_2, -1, 5, add = TRUE, lty = 2)
+#> Error in curve(TSCF_2, -1, 5, add = TRUE, lty = 2): could not find function "curve"
+legend("topright", lty = 1:2, bty = "n",
+  legend = c("Briggs et al. (1982)", "Dettenmaier et al. (2009)"))
+#> Error in legend("topright", lty = 1:2, bty = "n", legend = c("Briggs et al. (1982)",     "Dettenmaier et al. (2009)")): could not find function "legend"
+