Standard Test Method for Gravimetric Determination of Nonvolatile Residue From Cleanroom Wipers
洁净室刮水器非挥发性残留物重量测定的标准试验方法
1.1
本试验方法涵盖了航天器组装、清洁或测试中使用的雨刷的溶剂可提取非挥发性残留物(NVR)的测定,但不包括用于硬件分析表面取样的雨刷。
1.2
感兴趣的NVR是可以使用特定溶剂从洁净室擦拭物中提取的NVR,所述特定溶剂因其提取质量而被选择。可以选择替代溶剂,但由于其使用可能导致产生不同的值,因此必须在方法数据表中对其进行标识。
1.3
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。
1.3.1
例外-
英寸-磅单位仅供参考。
1.4
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。
1.5
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
通过该测试方法获得的NVR是基于测试溶剂可从擦拭物中释放的可提取量。
5.2
在规定温度下蒸发溶剂是为了量化预期在室温下存在的NVR,因为室温和测试温度之间的微小差异尚未显示出导致显著差异。5.3
该测试方法可能比评估仅限于干燥使用的雨刷所需的更具侵略性。
5.4
其他几种方法也用于确定NVR。本测试方法不旨在取代用于其他应用的测试方法。
1.1
This test method covers the determination of solvent extractable nonvolatile residue (NVR) from wipers used in assembly, cleaning, or testing of spacecraft, but not from those used for analytical surface sampling of hardware.
1.2
The NVR of interest is that which can be extracted from cleanroom wipers using a specified solvent that has been selected for its extractive qualities. Alternative solvents may be selected, but since their use may result in different values being generated, they must be identified in the procedure data sheet.
1.3
The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1
Exception—
The inch-pound units are included for information only.
1.4
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.
1.5
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
The NVR obtained by this test method is that extractable amount available for release from wipers based on test solvents.
5.2
Evaporation of the solvent at the stated temperature is to quantify the NVR that can be expected to exist at room temperature since the slight difference between room temperature and test temperature has not been shown to result in significant variances.
5.3
This test method may be more aggressive than necessary for the evaluation of wipers that will be restricted to dry use only.
5.4
Several other methods are also used to determine NVR. This test method is not intended to replace test methods used for other applications.