From dd6c4a8f895fd470345e7ae773299daaa4de7aef Mon Sep 17 00:00:00 2001 From: Johannes Ranke Date: Fri, 22 Feb 2019 20:51:13 +0100 Subject: Implement the NAFTA evaluation scheme --- docs/reference/nafta.html | 239 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 docs/reference/nafta.html (limited to 'docs/reference/nafta.html') diff --git a/docs/reference/nafta.html b/docs/reference/nafta.html new file mode 100644 index 00000000..c74c3939 --- /dev/null +++ b/docs/reference/nafta.html @@ -0,0 +1,239 @@ + + + + + + + + +Evaluate parent kinetics using the NAFTA guidance — nafta • mkin + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
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Evaluate parent kinetics using the NAFTA guidance

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The function fits the SFO, IORE and DFOP models using + mmkin and returns an object of class + nafta that has methods for printing and plotting.

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nafta(ds, title = NA, quiet = FALSE)
+ +

Arguments

+ + + + + + + + + + + + + + +
ds

A dataframe that must contain one variable called "time" with the time + values specified by the time argument, one column called "name" with + the grouping of the observed values, and finally one column of observed + values called "value".

title

Optional title of the dataset

quiet

Should the evaluation text be shown?

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Value

+ +

An list of class nafta. The list element named "mmkin" is the + mmkin object containing the fits of the three models. + The list element named "title" contains the title of the dataset used. + The list element "data" contains the dataset used in the fits.

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Source

+ +

NAFTA (2011) Guidance for evaluating and calculating degradation kinetics + in environmental media. NAFTA Technical Working Group on Pesticides + https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/guidance-evaluating-and-calculating-degradation + accessed 2019-02-22

+

US EPA (2015) Standard Operating Procedure for Using the NAFTA Guidance to + Calculate Representative Half-life Values and Characterizing Pesticide + Degradation + https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/standard-operating-procedure-using-nafta-guidance

+ + +

Examples

+ 
  nafta_evaluation <- nafta(MRID_555555)
#> The SFO model is rejected as S_SFO is equal or higher than the critical value S_c
#> The representative half-life of the IORE model is longer than the one corresponding to the terminal degradation rate found with the DFOP model.
#> The reprentative half-life obtained from the DFOP model may be used
  print(nafta_evaluation)
#> Parameters:
+#> $SFO
+#>                   Estimate       Pr(>t)        Lower        Upper
+#> parent_0      83.755751519 8.076390e-15 76.928220975 90.583282063
+#> k_parent_sink  0.001703321 7.452357e-05  0.001108568  0.002617164
+#> 
+#> $IORE
+#>                         Estimate Pr(>t)        Lower        Upper
+#> parent_0            9.685291e+01     NA 8.752855e+01 1.061773e+02
+#> k__iore_parent_sink 8.403374e-14     NA 1.092054e-19 6.466412e-08
+#> N_parent            6.684458e+00     NA 3.538511e+00 9.830405e+00
+#> 
+#> $DFOP
+#>              Estimate       Pr(>t)        Lower        Upper
+#> parent_0 9.755655e+01 4.439930e-13 8.884447e+01 1.062686e+02
+#> k1       4.240633e-02 3.554769e-02 1.414189e-02 1.271610e-01
+#> k2       8.237928e-04 2.060933e-02 3.172784e-04 2.138925e-03
+#> g        2.881037e-01 1.313715e-04 1.783967e-01 4.299694e-01
+#> 
+#> 
+#> DTx values:
+#>      DT50    DT90 DT50_rep
+#> SFO   407    1352      407
+#> IORE  541 5192066  1562968
+#> DFOP  429    2383      841
+#> 
+#> Representative half-life:
+#> [1] 841.4096
  plot(nafta_evaluation)
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+ + + + + + -- cgit v1.2.1