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See Chinese contents: GB/T 39995-2021 GB/T 39995-2021: Determination of sterols
This document specifies a method for the determination of sterols by liquid chromatography-mass spectrometry/mass spectrometry. This document applies to the determination of the content OF ¦Â-Cholestanol, brassicasterol, campesterol, stigmasterol, ¦Â-Sitosterol, fucosterol, lanosterol, stigmastanol, and ergosterol in the free state IN lard, rapeseed oil, walnuts, hawthorn, lettuce, kudzu root, rice, wheat, and black green beans.
