Home>ASTM Standards>ASTM D5325-03(R2021) pdf free download

ASTM D5325-03(R2021) pdf free download

ASTM D5325-03(R2021) pdf free download.Standard Test Method for Determination of Weight Percent Volatile Content of Water- Borne Aerosol Paints
1. Scope
1.1 This test method is for the determination of the weight percent volatile content of water-borne paints in aerosols. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.4 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Summary of Test Method
3.1 The propellant is released from the can and the content remaining is tested for percent water and nonvolatiles.
4. Significance and Use
4.1 Calculation of the weight percent volatile organic con- tent of water-borne paints, requires that the water content be known. This test method provides a direct way to determine the weight percent volatile organic matter of water-borne aerosol paints minus the matter content. This test method is modeled after Method 36.
6. Procedure
6.1 Preparation ofAerosol Contents for Analysis: 6.1.1 Mix the aerosol paint container thoroughly for about 15 min, using a shaker similar to the Eberbach shaker shown in Fig. 1, at the low speed setting. It is essential that the samples be well mixed to obtain valid results. 6.1.2 Remove the cap and actuator from the can. Put the cap on the can and weigh the can to 0.01 g. 6.1.3 Place the can in an upside down position in a freezer for 2 h at a temperature that is 0°C. 6.1.4 Put the can upside down in a fume hood. Puncture the bottom of the can near the edge with a very sharp ice pick.Slowly remove the ice pick from the hole. Leave the hole uncovered for about 12 to 16 h to allow most of the propellant to escape. 6.1.5 Enlarge the hole slightly by tapping the ice pick further into the can. Swirl the can gently for 1 to 2 min to remove any remaining propellant. 6.1.6 Wipe off any condensate that may have accumulated on the can. Weigh the can to 60.01 g. 6.1.7 Plug the hole with a small applicator stick (about 1 ⁄ 2 cm long) and then place masking tape over the plugged hole. 6.1.8 Place the can on the shaker in a position so that the hole is at the highest possible position to prevent leakage of contents. Shake the can for about 15 min at the low speed setting. 6.1.9 Cut the bottom of the can using a metal cutter. Stir the contents with a spatula, then transfer the contents to a pint can with lid. 6.1.10 Rinse the aerosol can, agitators, and bottom several times using solvent. Allow the can, agitators, and the bottom to dry. Weigh to 60.01 g.
8. Precision and Bias
8.1 Precision—Estimates are based on an interlaboratory study in which 1 operator in each of 5 laboratories analyzed in duplicate on 2 different days 1 sample of a water-borne aerosol containing 69 to 72 % organic volatiles. The coatings were commercially supplied. The results were analyzed in accor- dance with Practice E180. The within laboratory coefficient of variation was found to be 1.67 % relative at 9 df and the between laboratory coefficient of variation was 2.14 % relative at 7 df. Based on these coefficients, the following criteria should be used for judging the acceptability of results at the 95 % confidence level. 8.1.1 Repeatability—Two results, each the mean of dupli- cate determinations, obtained by the same operator on different days should be considered suspect if they differ by more than 5.36 % relative. 8.1.2 Reproducibility—Two results each the mean of dupli- cate determinations obtained by operators in different laboratories, should be considered suspect if they differ by more than 7.16 %. 8.2 Bias—Bias cannot be determined because there are no accepted standards for weight percent volatile content of water-borne aerosol paints.

Maybe you like

Standards Tags