D482

D482-00a
Standard Test Method for Ash from Petroleum Products

1.1 This test method covers the determination of ash in the range 0.001-0.180 mass %, from distillate and residual fuels, gas turbine fuels, crude oils, lubricating oils, waxes, and other petroleum products, in which any ash-forming materials present are normally considered to be undesirable impurities or contaminants (Note 1). The test method is limited to petroleum products which are free from added ash-forming additives, including certain phosphorus compounds (Note 2).

Note 1-In certain types of samples, all of the ash-forming metals are not retained quantitatively in the ash. This is particularly true of distillate oils, which require a special ash procedure in order to retain metals quantitatively. Note 2-This test method is not intended for the analysis of unused lubricating oils containing additives; for such samples use Test Method D-874. Neither is it intended for the analysis of lubricating oils containing lead nor for used engine crankcase oils.

1.2 The preferred units are mass %.

Also see: ISO-6245

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