【国外标准】 Standard Practice for Vacuum Distillation of Solvents From Solvent-Reducible Paints For Analysis (Withdrawn 2008)

This practice covers the vacuum distillation process used to separate solvents from the nonvolatile portions of paints for analysis. The procedure entails adding tricresyl phosphate to a sample of the whole paint and heating the mixture using a silicon oil bath. The distillation is then allowed to proceed for a time before vacuum is applied and then dry air is made to pass through the system to facilitate the removal of any high-boiling solvents present. The apparatus needed for this practice include a custom made apparatus, a vacuum punp, a septum sample vial, and a safety shield. Methylene chloride or acetone, silicone oil, and tricresyl phosphate are used as reagents.1.1 This practice covers a vacuum distillation procedure that separates the solvents from the nonvolatile portion of paints so they may be analyzed.1.2 An alternative procedure for the analysis of solvents in paints is described in Practice D 3271.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are 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 and health practices and determine the applicability of regulatory limitations prior to use.