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标题:ASTM D482石油产品灰分测定
正文:
ASTM D482-2013 Standard Test Method for Ash from Petroleum ProductsASTM D482-2013 石油产品灰分测定1. ASTM D482标准适用范围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 D874. Neither is it inte
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