-
ASTM D3687-2019用活性碳管吸附法分析收集的有机化合物蒸气的规程Standard Test Method for Analysis of Organic Compound Vapors Collected by the Activated Charcoal Tube Adsorption Method
<div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.1</span> This test method describes the extraction and gas chromatographic determination of organic vapors that have been adsorbed from air in sampling tubes packed with activated charcoal.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.2</span> This test method is complementary to Practice <span class="Body-link1 cdone">D3686</span>.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.3</span> This test method is applicable for analysis of samples taken from workplace or other atmospheres provided that the contaminant adsorbs onto charcoal, that it can be adequately extracted from the charcoal, and that it can be analyzed by gas chromatography (GC). Other adsorbents and other extraction techniques are described in Practice <span class="Body-link1 cdone">D6196</span>.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.4</span> Organic compounds of multicomponent samples may mutually interfere during analysis. Methods to resolve interferences are given in Section <span class="Body-link1 cdone">6</span>.</p></div> <div class="SectionLevel2"> <p class="subsec1 cdone2"><span class="Head3 cdone">1.5</span> The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.</p></div> <div class="SectionLevel2"> <p class="caveat cdone2"><span class="Head3 cdone">1.6</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;" c...
2023-04-21 07:40:01浏览：59
查看 -
-
-
无水乙醇制备的研究进展
介绍了采用精馏法、分子筛分离法、膜分离法和作物吸附法制备无水乙醇的方法及其近年来无水乙醇制备的新进展.评述了这些方法的优缺点,并且指出如何改进产品质量和降低生产的能耗.最后,展望了无水乙醇制备的发展前景,同时对我国无水乙醇研究与开发提出了一些建议....
2020-06-12 15:08:08浏览：1425
查看 -
无水乙醇制备的研究进展
介绍了采用精馏法、分子筛分离法、膜分离法和作物吸附法制备无水乙醇的方法及其近年来无水乙醇制备的新进展.评述了这些方法的优缺点,并且指出如何改进产品质量和降低生产的能耗.最后,展望了无水乙醇制备的发展前景,同时对我国无水乙醇研究与开发提出了一些建议....
2020-03-23 18:09:30浏览：1421
查看
