1.1 本试验方法涵盖了总表面积和中孔面积的测定 2 吸附。根据这些结果计算含沸石催化剂的沸石面积和微孔体积。微孔体积与催化剂中沸石的百分比有关。还可以计算沸石面积，即与沸石孔内的表面积相关的数字。然而，由于氮分子在沸石内堆积的方式，沸石面积难以用物理术语解释。 1.2 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.3 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。有关具体的预防声明，请参见 附注3 . 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 该气体吸附法补充了测试方法的X射线程序 D3906 这种测试方法对于没有X射线衍射仪的实验室是有用的。每种测试方法都可以通过使用一系列合适的机械混合物来校准，以提供所谓的沸石百分比。如果沸石中存在无序，吸附法将产生比X射线法更高的值。如果一些沸石孔(微孔)被堵塞或填充，则情况正好相反。

1.1 This test method covers the determination of total surface area and mesopore area from N 2 adsorption. From these results are calculated the zeolite area and micropore volume of a zeolite containing catalyst. The micropore volume is related to the percent zeolite in the catalyst. The zeolite area, a number related to the surface area within the zeolite pores, may also be calculated. Zeolite area, however, is difficult to interpret in physical terms because of the manner in which nitrogen molecules pack within the zeolite. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. For a specific precautionary statement, see Note 3 . 1.4 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. ====== Significance And Use ====== 5.1 This gas adsorption method complements the X-ray procedure of Test Method D3906 . This test method will be useful to laboratories that do not have X-ray diffractometers. Each test method can be calibrated by use of an appropriate series of mechanical mixtures to provide what may be termed percent zeolite. If there is disorder in the zeolite, the adsorption method will yield higher values than the X-ray method. The reverse will be true if some zeolite pores (micropores) are blocked or filled.