เคมี
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOCS
Ba 13-87
Free Hexane Content in Extracted Meals
2017
4
665.0288 AOCS 7th ed. 2017-2019 rev. Ref.
“Free” hexane content of extracted meals is determined by heating the sample at 80 °C in a closed vessel after addition of an internal standard and determining hexane in the headspace by gas chromatography. This method is applicable to the determination of “free” volatile hydrocarbons, expressed in terms of hexane, remaining in oilseed residues after extraction with hydrocarbon-based solvents. This method is equivalent to International Union of Pure and Applied Chemistry (IUPAC) Standard Method 1.172 (References, 1 and 2).