ASTM E3063 : 26

<div class="SectionLevel2"><p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span> This test method covers the measurement of antimony concentration in plastics or other hydrocarbon or organic matrix by using neutron activation analysis (NAA). The sample is activated by irradiation with neutrons from a research reactor and the subsequently emitted gamma-rays are detected with a germanium semiconductor detector. The same system may be used to determine antimony concentrations ranging from 1 ng/g to 10 000 μg/g with the lower end of the range limited by numerous interferences and the upper limit established by the demonstrated practical application of NAA.</p></div><div class="SectionLevel2"><p class="subsec1 cdone2"><span class="Head3 cdone">1.2</span> This test method may be used on either solid or liquid samples, provided that they can be made to conform in size and shape during irradiation and counting to a standard sample of known antimony content using very simple sample preparation. Several variants of this method have been described in the technical literature. A monograph is available which provides a comprehensive description of the principles of neutron activation analysis using reactor neutrons <span style="font-weight:bold;" class="overriddenformat">(<span class="Body-link1 cdone">1</span>)</span>.<span style="font-style:normal;"/></p></div><div class="SectionLevel2"><p class="subsec1 cdone2"><span class="Head3 cdone">1.3</span> The values stated in SI units are to be regarded as standard. The values stated in the non-SI units of “counts” and “ppm” are also regarded as standard. No units of other systems of measurement (i.e., non-SI) are included in this standard.</p></div><div class="SectionLevel2"><p class="caveat cdone2"><span class="Head3 cdone">1.4</span> <i>This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. <span style="font-style:normal; font-weight:normal;" class="overriddenformat">Specific precautions are given in Section <span class="Body-link1 cdone">9</span>.</span></i></p></div><div class="SectionLevel2"><p class="WTOcaveat cdone2"><span class="Head3 cdone">1.5</span> <i>This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.</i></p></div>