ASTM E1235 - 12(2020)e1
Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft
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Significance and Use
5.1 The NVR determined by this test method is that amount that can reasonably be expected to exist on hardware exposed in environmentally controlled areas.
5.2 The evaporation of the solvent at or near room temperature is to quantify the NVR that exists at room temperature.
5.3 Numerous other methods are being used to determine NVR. This test method is not intended to replace methods used for other applications.
1. Scope
1.1 This test method covers the determination of nonvolatile residue (NVR) fallout in environmentally controlled areas used for the assembly, testing, and processing of spacecraft.
1.2 The NVR of interest is that which is deposited on sampling plate surfaces at room temperature: it is left to the user to infer the relationship between the NVR found on the sampling plate surface and that found on any other surfaces.
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.
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 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D1193 Specification for Reagent Water
E1234 Practice for Handling, Transporting, and Installing Nonvolatile Residue (NVR) Sample Plates Used in Environmentally Controlled Areas for Spacecraft
F50 Practice for Continuous Sizing and Counting of Airborne Particles in Dust-Controlled Areas and Clean Rooms Using Instruments Capable of Detecting Single Sub-Micrometre and Larger Particles
ISO Standards
14644-1 Cleanrooms and Associated Controlled EnvironmentsPart 1: Classification of Air Cleanliness 14644-2 Cleanrooms and Associated Controlled EnvironmentsPart 2: Specifications for Testing and Monitoring to Prove Continued Compliance with ISO 14644-1Institute of Environmental Sciences and Technology
IEST-RP-CC001.3 IEST-RP-CC034.1 HEPA and ULPA Filter Leak TestsICS Code
ICS Number Code 49.025.01 (Materials for aerospace construction in general); 49.140 (Space systems and operations)
UNSPSC Code
UNSPSC Code 25150000(Spacecraft)
Referencing This Standard
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DOI: 10.1520/E1235-12R20E01
Citation Format
ASTM E1235-12(2020)e1, Standard Test Method for Gravimetric Determination of Nonvolatile Residue (NVR) in Environmentally Controlled Areas for Spacecraft, ASTM International, West Conshohocken, PA, 2020, www.astm.org
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