<?xml version="1.0" encoding="UTF-8"?><toc><section id="foreword.nat"><title>Vorwort</title><section id="sub-amendments"><title>Änderungen</title></section><section id="sub-previous.edition"><title>Frühere Ausgaben</title></section></section><section id="sub-1"><label>1</label><title>Anwendungsbereich</title></section><section id="sub-2"><label>2</label><title>Begriffe</title></section><section id="sub-3"><label>3</label><title>Beispiele für Ionenaustausch</title></section><section id="sub-annex.bibliography.nat"><title>Literaturhinweise (informativ)</title></section><section id=""><title>Stichwortverzeichnis</title></section></toc>