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Significance and Use
The NVR obtained by this test method is that amount which is available for release by the gloves onto handled surfaces.
Evaporation of 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 the test temperature is not likely to result in significant variances.
This method may be more aggressive than necessary to determine the suitability of cleanroom gloves that are restricted to dry operations only.
Various other methods exist for determining NVR, for example Practice G120 and IES-RP-CC005. This test is not intended to replace test methods used for other purposes.
1.1 This test method covers the determination of solvent extractable nonvolatile residue (NVR) from gloves used in cleanrooms where spacecraft are assembled, cleaned, or tested.
1.2 The NVR of interest is that which can be extracted from gloves using a specified solvent that has been selected for its extracting qualities, or because it is representative of solvents used in the particular facility. Alternative solvents may be used, 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.
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1193 Specification for Reagent Water
E2217 Practice for Design and Construction of Aerospace Cleanrooms and Contamination Controlled Areas
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
G120 Practice for Determination of Soluble Residual Contamination by Soxhlet Extraction
Federal StandardsFed Std 209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones Fed-Std-209E has been replaced by ISO 14644-1 and -2, but may continue to be used by mutual agreement.
Other DocumentsISO 14644-2 Cleanrooms and Associated Controlled Environments, Specifications for testing and monitoring to prove continued compliance with ISO 14644-1
ICS Number Code 49.025.99 (Other materials); 71.040.50 (Physicochemical methods of analysis)
UNSPSC Code 46181504(Protective gloves)
ASTM E1731-11, Standard Test Method for Gravimetric Determination of Nonvolatile Residue from Cleanroom Gloves, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top