<?xml version="1.0" encoding="UTF-8"?><toc><section id="foreword.nat"><title>Nationales Vorwort</title><section id="sub-amendments"><title>Änderungen</title></section><section id="sub-previous.edition"><title>Frühere Ausgaben</title></section></section><section id="foreword.reg"><title>Europäisches Vorwort</title></section><section id="sub-endorsement.notice"><title>Anerkennungsnotiz</title></section><section id="foreword.int"><title>Vorwort</title></section><section id="sub-1"><label>1</label><title>Anwendungsbereich</title></section><section id="sub-2"><label>2</label><title>Normative Verweisungen</title></section><section id="sub-3"><label>3</label><title>Begriffe</title></section><section id="sub-4"><label>4</label><title>Kurzbeschreibung</title></section><section id="sub-5"><label>5</label><title>Reagenzien</title></section><section id="sub-6"><label>6</label><title>Geräte</title></section><section id="sub-7"><label>7</label><title>Probenahme</title></section><section id="sub-8"><label>8</label><title>Durchführung</title><section id="sub-8.1"><label>8.1</label><title>Prüfmengen</title></section><section id="sub-8.2"><label>8.2</label><title>Blindwertprüfung</title></section><section id="sub-8.3"><label>8.3</label><title>Bestimmung</title><section id="sub-8.3.1"><label>8.3.1</label><title>Angriff der Prüfmenge durch Säure und Bildung von hydratisiertem Siliziumdioxid</title></section><section id="sub-8.3.2"><label>8.3.2</label><title>Filtration und Waschen</title></section><section id="sub-8.3.3"><label>8.3.3</label><title>Wiederfindungsrate von Siliziumverbindungen im Filtrat</title></section><section id="sub-8.3.4"><label>8.3.4</label><title>Ausglühen, Verflüchtigung von Siliziumdioxid und Wägen</title></section></section></section><section id="sub-9"><label>9</label><title>Auswertung</title><section id="sub-9.1"><label>9.1</label><title>Berechnungsverfahren</title></section><section id="sub-9.2"><label>9.2</label><title>Präzision</title></section></section><section id="sub-10"><label>10</label><title>Prüfbericht</title></section><section id="sub-a"><label>Anhang A</label><title>Zusätzliche Information zum internationalen Ringversuch (informativ)</title></section><section id="sub-b"><label>Anhang B</label><title>Graphische Darstellung der Präzisionsdaten (informativ)</title></section><section id="sub-annex.bibliography.int"><title>Literaturhinweise (informativ)</title></section><section id="sub-na"><label>Nationaler Anhang NA</label><title>Literaturhinweise (informativ)</title></section></toc>