1.1 本试验方法包括萘蒸发残留物的测定。 1.2 已经发现该试验方法适用于测定0.3和1.5重量%范围内的残留物。 1.3 在使用该方法确定试验结果是否符合适用规范时，应根据实践中的舍入方法对结果进行舍入 第29页 。 1.4 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 有关具体危险说明，请参阅第节 7. ， 8.1 ， 9.2 和 9.3 。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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 蒸发残留物是萘中非挥发性杂质的经验测量。此测试方法适用于设置规范并用作内部质量控制工具。

1.1 This test method covers the determination of the evaporation residue of naphthalene. 1.2 This test method has been found applicable to determining residue in the range of 0.3 and 1.5 wt %. 1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29 . 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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 specific hazard statements, see Section 7 , 8.1 , 9.2 , and 9.3 . 1.6 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 Evaporation residue is an empirical measure of nonvolatile impurities in naphthalene. This test method is suitable for setting specifications and for use as an internal quality control tool.