<?xml version="1.0" encoding="UTF-8"?><toc><section id="sec_foreword"><title>Foreword</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>Principle</title></section><section id="sec_5"><label>5</label><title>Reagents</title></section><section id="sec_6"><label>6</label><title>Apparatus</title></section><section id="sec_7"><label>7</label><title>Preparations</title></section><section id="sec_8"><label>8</label><title>Procedure</title><section id="sec_8.1"><label>8.1</label><title>Sample size</title></section><section id="sec_8.2"><label>8.2</label><title>Extraction process</title></section><section id="sec_8.3"><label>8.3</label><title>HPLC settings</title></section><section id="sec_8.4"><label>8.4</label><title>Qualitative analysis</title></section><section id="sec_8.5"><label>8.5</label><title>Quantitative determination</title><section id="sec_8.5.1"><label>8.5.1</label><title>Standard response curve</title></section><section id="sec_8.5.2"><label>8.5.2</label><title>Sample solution chromatogram</title></section></section><section id="sec_8.6"><label>8.6</label><title>Blank test</title></section><section id="sec_8.7"><label>8.7</label><title>Parallel test</title></section></section><section id="sec_9"><label>9</label><title>Results calculation</title></section><section id="sec_10"><label>10</label><title>Precision</title></section><section id="sec_11"><label>11</label><title>Test report</title></section><section id="sec_A"><label>Annex A</label><title>HPLC chromatogram of standard picric acid (informative)</title></section></toc>