ASTM D5200-03 (R2021) pdf free download.Standard Test Method for Determination of Weight Percent Volatile Content of Solvent-Borne Paints in Aerosol Cans.
1 . 1 This test method is for the determination of the weight percent volatile organic compounds of solvent-borne paints in aerosol cans. It offers a unique way to obtain paint specimens from aerosol cans.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement arc included in this standard.
6. Procedure
6.1 Mix the aerosol can thoroughly using a shaker, similar to the Eberbach shaker in Fig. 2, for 15 mm at the low-speed setting. It is essential that the samples be well mixed to obtain valid results.
6.2 Weigh accurately to 0.01 g. a preconditioned sample adapter tube. Use a pair of gloves at all times when handling the adapter glass tube.
6.3 Remove the cap and actuator from the mixed can. Replace the actuator with one having an extension tube.
6.4 Test actuator and extension tube fit by spraying some contents out for about 5 s. This step also clears the dip tube in case a separation has occurred. if a leak is observed, replace with a better fitting actuator or extension tube.
6.5 Weigh the aerosol can with the actuator to the nearest 0.01 g. Spray 3 to 5 g of aerosol into the adapter tube assembly. spreading out the coating by moving the extension tube around the wall of the adapter tube. The spraying is done with the vacuum on.
6.6 Obtain the specimen weight by difference by weighing the aerosol can again to 0.01 g after spraying out the specimen.
6.7 Place the sample adapter tube in the drying oven kr 60 mm at 110 5°C. (Warning—Provide adequate ventilation, consistent with accepted laboratory practice, to prevent solvent vapors from accumulating to a dangerous level.)
6.8 Remove the adapter tubes from the oven, place immediately in a dessicator, cool to ambient temperature, and weigh to 0.01 g.
7. Calculations
7.1 Calculate the weight percent nonvolatile content (NV), in the aerosol can as follows:
8. 1.1 Repeatability—Two results, each the mean of duplicate determinations obtained by the same operator on different days, should be considered suspect if they differ by more than 1.62 % relative.
8.1.2 Reprodudbility—Two results, each the mean of duplicate determinations obtained by operators in different laboratories should be considered suspect if they differ by more than 3.59 %.ASTM D5200 pdf download.