<?xml version="1.0" encoding="UTF-8"?><toc><section id="sec_foreword"><title>Foreword</title></section><section id="sec_intro"><title>Introduction</title></section><section id="sec_1"><label>1</label><title>Scope</title></section><section id="sec_2"><label>2</label><title>Normative references</title></section><section id="sec_3"><label>3</label><title>Terms and definitions</title></section><section id="sec_4"><label>4</label><title>Standard conditions</title><section id="sec_4.1"><label>4.1</label><title>Machine pressure drop</title></section><section id="sec_4.2"><label>4.2</label><title>Puff duration</title></section><section id="sec_4.3"><label>4.3</label><title>Puff volume</title></section><section id="sec_4.4"><label>4.4</label><title>Puff frequency</title></section><section id="sec_4.5"><label>4.5</label><title>Puff profile</title></section><section id="sec_4.6"><label>4.6</label><title>Puff number</title></section></section><section id="sec_5"><label>5</label><title>Specification of the machine</title><section id="sec_5.1"><label>5.1</label><title>General</title></section><section id="sec_5.2"><label>5.2</label><title>Operating principle and puff profile</title></section><section id="sec_5.3"><label>5.3</label><title>Reliability and compensation</title></section><section id="sec_5.4"><label>5.4</label><title>THS holder</title></section><section id="sec_5.5"><label>5.5</label><title>Aerosol traps</title></section><section id="sec_5.6"><label>5.6</label><title>Sample conditioning and handling</title></section><section id="sec_5.7"><label>5.7</label><title>Test atmosphere</title></section><section id="sec_5.8"><label>5.8</label><title>THD preparation</title></section><section id="sec_5.9"><label>5.9</label><title>Vent blocking</title></section><section id="sec_5.10"><label>5.10</label><title>Initiation of collection</title></section><section id="sec_5.11"><label>5.11</label><title>Termination of collection</title></section><section id="sec_5.12"><label>5.12</label><title>Device error or malfunction</title></section></section><section id="sec_bibl"><title>Bibliography</title></section></toc>