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Ashing
Ashing is a test to deduce the amount of ash forming material present in a petroleum product so as to decide its use in certain applications. Ash-forming materials are considered to be undesirable impurities or contaminants. The specimen is placed in a suitable vessel, evaporating dish or crucible and ignited. It is allowed to burn until only ash and carbon remains. The carbonaceous residue is reduced to ash by heating in a Muffle furnace at about 775oC, cooled and weighed. Ashing is also performed prior to chemical analysis by inductively coupled plasma emission spectrometry. ==See also==
*Ash (analytical chemistry) *Inductively coupled plasma emission spectrometry *Atomic absorption spectroscopy
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ashing」の詳細全文を読む
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