<!DOCTYPE html> <!-- Generated by pkgdown: do not edit by hand --><html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Evaluate parent kinetics using the NAFTA guidance — nafta • mkin</title><!-- jquery --><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script><!-- Bootstrap --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha256-bZLfwXAP04zRMK2BjiO8iu9pf4FbLqX6zitd+tIvLhE=" crossorigin="anonymous"><script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha256-nuL8/2cJ5NDSSwnKD8VqreErSWHtnEP9E7AySL+1ev4=" crossorigin="anonymous"></script><!-- bootstrap-toc --><link rel="stylesheet" href="../bootstrap-toc.css"><script src="../bootstrap-toc.js"></script><!-- Font Awesome icons --><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/all.min.css" integrity="sha256-mmgLkCYLUQbXn0B1SRqzHar6dCnv9oZFPEC1g1cwlkk=" crossorigin="anonymous"><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.12.1/css/v4-shims.min.css" integrity="sha256-wZjR52fzng1pJHwx4aV2AO3yyTOXrcDW7jBpJtTwVxw=" crossorigin="anonymous"><!-- clipboard.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.6/clipboard.min.js" integrity="sha256-inc5kl9MA1hkeYUt+EC3BhlIgyp/2jDIyBLS6k3UxPI=" crossorigin="anonymous"></script><!-- headroom.js --><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/headroom.min.js" integrity="sha256-AsUX4SJE1+yuDu5+mAVzJbuYNPHj/WroHuZ8Ir/CkE0=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/headroom/0.11.0/jQuery.headroom.min.js" integrity="sha256-ZX/yNShbjqsohH1k95liqY9Gd8uOiE1S4vZc+9KQ1K4=" crossorigin="anonymous"></script><!-- pkgdown --><link href="../pkgdown.css" rel="stylesheet"><script src="../pkgdown.js"></script><meta property="og:title" content="Evaluate parent kinetics using the NAFTA guidance — nafta"><meta property="og:description" content="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. Print nafta objects. The results for the three models are printed in the order of increasing model complexity, i.e. SFO, then IORE, and finally DFOP."><!-- mathjax --><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-84DKXVJXs0/F8OTMzX4UR909+jtl4G7SPypPavF+GfA=" crossorigin="anonymous"></script><!--[if lt IE 9]> <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script> <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> <![endif]--></head><body data-spy="scroll" data-target="#toc"> <div class="container template-reference-topic"> <header><div class="navbar navbar-default navbar-fixed-top" role="navigation"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <span class="navbar-brand"> <a class="navbar-link" href="../index.html">mkin</a> <span class="version label label-default" data-toggle="tooltip" data-placement="bottom" title="Released version">1.2.0</span> </span> </div> <div id="navbar" class="navbar-collapse collapse"> <ul class="nav navbar-nav"><li> <a href="../reference/index.html">Functions and data</a> </li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false"> Articles <span class="caret"></span> </a> <ul class="dropdown-menu" role="menu"><li> <a href="../articles/mkin.html">Introduction to mkin</a> </li> <li> <a href="../articles/FOCUS_D.html">Example evaluation of FOCUS Example Dataset D</a> </li> <li> <a href="../articles/FOCUS_L.html">Example evaluation of FOCUS Laboratory Data L1 to L3</a> </li> <li> <a href="../articles/web_only/dimethenamid_2018.html">Example evaluations of dimethenamid data from 2018 with nonlinear mixed-effects models</a> </li> <li> <a href="../articles/web_only/multistart.html">Short demo of the multistart method</a> </li> <li> <a href="../articles/web_only/compiled_models.html">Performance benefit by using compiled model definitions in mkin</a> </li> <li> <a href="../articles/web_only/FOCUS_Z.html">Example evaluation of FOCUS Example Dataset Z</a> </li> <li> <a href="../articles/twa.html">Calculation of time weighted average concentrations with mkin</a> </li> <li> <a href="../articles/web_only/NAFTA_examples.html">Example evaluation of NAFTA SOP Attachment examples</a> </li> <li> <a href="../articles/web_only/benchmarks.html">Benchmark timings for mkin</a> </li> <li> <a href="../articles/web_only/saem_benchmarks.html">Benchmark timings for saem.mmkin</a> </li> </ul></li> <li> <a href="../news/index.html">News</a> </li> </ul><ul class="nav navbar-nav navbar-right"><li> <a href="https://github.com/jranke/mkin/" class="external-link"> <span class="fab fa-github fa-lg"></span> </a> </li> </ul></div><!--/.nav-collapse --> </div><!--/.container --> </div><!--/.navbar --> </header><div class="row"> <div class="col-md-9 contents"> <div class="page-header"> <h1>Evaluate parent kinetics using the NAFTA guidance</h1> <small class="dont-index">Source: <a href="https://github.com/jranke/mkin/blob/HEAD/R/nafta.R" class="external-link"><code>R/nafta.R</code></a></small> <div class="hidden name"><code>nafta.Rd</code></div> </div> <div class="ref-description"> <p>The function fits the SFO, IORE and DFOP models using <code><a href="mmkin.html">mmkin</a></code> and returns an object of class <code>nafta</code> that has methods for printing and plotting.</p> <p>Print nafta objects. The results for the three models are printed in the order of increasing model complexity, i.e. SFO, then IORE, and finally DFOP.</p> </div> <div id="ref-usage"> <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">nafta</span><span class="op">(</span><span class="va">ds</span>, title <span class="op">=</span> <span class="cn">NA</span>, quiet <span class="op">=</span> <span class="cn">FALSE</span>, <span class="va">...</span><span class="op">)</span></span> <span></span> <span><span class="co"># S3 method for nafta</span></span> <span><span class="fu"><a href="https://rdrr.io/r/base/print.html" class="external-link">print</a></span><span class="op">(</span><span class="va">x</span>, quiet <span class="op">=</span> <span class="cn">TRUE</span>, digits <span class="op">=</span> <span class="fl">3</span>, <span class="va">...</span><span class="op">)</span></span></code></pre></div> </div> <div id="source"> <h2>Source</h2> <p>NAFTA (2011) Guidance for evaluating and calculating degradation kinetics in environmental media. NAFTA Technical Working Group on Pesticides <a href="https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/guidance-evaluating-and-calculating-degradation" class="external-link">https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/guidance-evaluating-and-calculating-degradation</a> accessed 2019-02-22</p> <p>US EPA (2015) Standard Operating Procedure for Using the NAFTA Guidance to Calculate Representative Half-life Values and Characterizing Pesticide Degradation <a href="https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/standard-operating-procedure-using-nafta-guidance" class="external-link">https://www.epa.gov/pesticide-science-and-assessing-pesticide-risks/standard-operating-procedure-using-nafta-guidance</a></p> </div> <div id="arguments"> <h2>Arguments</h2> <dl><dt>ds</dt> <dd><p>A dataframe that must contain one variable called "time" with the time values specified by the <code>time</code> argument, one column called "name" with the grouping of the observed values, and finally one column of observed values called "value".</p></dd> <dt>title</dt> <dd><p>Optional title of the dataset</p></dd> <dt>quiet</dt> <dd><p>Should the evaluation text be shown?</p></dd> <dt>...</dt> <dd><p>Further arguments passed to <code><a href="mmkin.html">mmkin</a></code> (not for the printing method).</p></dd> <dt>x</dt> <dd><p>An <code>nafta</code> object.</p></dd> <dt>digits</dt> <dd><p>Number of digits to be used for printing parameters and dissipation times.</p></dd> </dl></div> <div id="value"> <h2>Value</h2> <p>An list of class <code>nafta</code>. The list element named "mmkin" is the <code><a href="mmkin.html">mmkin</a></code> 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.</p> </div> <div id="author"> <h2>Author</h2> <p>Johannes Ranke</p> </div> <div id="ref-examples"> <h2>Examples</h2> <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span></span></span> <span class="r-in"><span> <span class="va">nafta_evaluation</span> <span class="op"><-</span> <span class="fu">nafta</span><span class="op">(</span><span class="va">NAFTA_SOP_Appendix_D</span>, cores <span class="op">=</span> <span class="fl">1</span><span class="op">)</span></span></span> <span class="r-msg co"><span class="r-pr">#></span> The SFO model is rejected as S_SFO is equal or higher than the critical value S_c</span> <span class="r-msg co"><span class="r-pr">#></span> The representative half-life of the IORE model is longer than the one corresponding</span> <span class="r-msg co"><span class="r-pr">#></span> to the terminal degradation rate found with the DFOP model.</span> <span class="r-msg co"><span class="r-pr">#></span> The representative half-life obtained from the DFOP model may be used</span> <span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/base/print.html" class="external-link">print</a></span><span class="op">(</span><span class="va">nafta_evaluation</span><span class="op">)</span></span></span> <span class="r-out co"><span class="r-pr">#></span> Sums of squares:</span> <span class="r-out co"><span class="r-pr">#></span> SFO IORE DFOP </span> <span class="r-out co"><span class="r-pr">#></span> 1378.6832 615.7730 517.8836 </span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> Critical sum of squares for checking the SFO model:</span> <span class="r-out co"><span class="r-pr">#></span> [1] 717.4598</span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> Parameters:</span> <span class="r-out co"><span class="r-pr">#></span> $SFO</span> <span class="r-out co"><span class="r-pr">#></span> Estimate Pr(>t) Lower Upper</span> <span class="r-out co"><span class="r-pr">#></span> parent_0 83.7558 1.80e-14 77.18268 90.3288</span> <span class="r-out co"><span class="r-pr">#></span> k_parent 0.0017 7.43e-05 0.00112 0.0026</span> <span class="r-out co"><span class="r-pr">#></span> sigma 8.7518 1.22e-05 5.64278 11.8608</span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> $IORE</span> <span class="r-out co"><span class="r-pr">#></span> Estimate Pr(>t) Lower Upper</span> <span class="r-out co"><span class="r-pr">#></span> parent_0 9.69e+01 NA 8.88e+01 1.05e+02</span> <span class="r-out co"><span class="r-pr">#></span> k__iore_parent 8.40e-14 NA 1.79e-18 3.94e-09</span> <span class="r-out co"><span class="r-pr">#></span> N_parent 6.68e+00 NA 4.19e+00 9.17e+00</span> <span class="r-out co"><span class="r-pr">#></span> sigma 5.85e+00 NA 3.76e+00 7.94e+00</span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> $DFOP</span> <span class="r-out co"><span class="r-pr">#></span> Estimate Pr(>t) Lower Upper</span> <span class="r-out co"><span class="r-pr">#></span> parent_0 9.76e+01 1.94e-13 9.02e+01 1.05e+02</span> <span class="r-out co"><span class="r-pr">#></span> k1 4.24e-02 5.92e-03 2.03e-02 8.88e-02</span> <span class="r-out co"><span class="r-pr">#></span> k2 8.24e-04 6.48e-03 3.89e-04 1.75e-03</span> <span class="r-out co"><span class="r-pr">#></span> g 2.88e-01 2.47e-05 1.95e-01 4.03e-01</span> <span class="r-out co"><span class="r-pr">#></span> sigma 5.36e+00 2.22e-05 3.43e+00 7.30e+00</span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> DTx values:</span> <span class="r-out co"><span class="r-pr">#></span> DT50 DT90 DT50_rep</span> <span class="r-out co"><span class="r-pr">#></span> SFO 407 1350 407</span> <span class="r-out co"><span class="r-pr">#></span> IORE 541 5190000 1560000</span> <span class="r-out co"><span class="r-pr">#></span> DFOP 429 2380 841</span> <span class="r-out co"><span class="r-pr">#></span> </span> <span class="r-out co"><span class="r-pr">#></span> Representative half-life:</span> <span class="r-out co"><span class="r-pr">#></span> [1] 841.41</span> <span class="r-in"><span> <span class="fu"><a href="https://rdrr.io/r/graphics/plot.default.html" class="external-link">plot</a></span><span class="op">(</span><span class="va">nafta_evaluation</span><span class="op">)</span></span></span> <span class="r-plt img"><img src="nafta-1.png" alt="" width="700" height="433"></span> <span class="r-in"><span></span></span> </code></pre></div> </div> </div> <div class="col-md-3 hidden-xs hidden-sm" id="pkgdown-sidebar"> <nav id="toc" data-toggle="toc" class="sticky-top"><h2 data-toc-skip>Contents</h2> 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