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ISO 1955:1982 Citrus fruits and derived products -- Determination of essential oils content (Reference method)
standard by International Organization for Standardization, 12/01/1982
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The method consists in boiling a test portion, diluted or undiluted, and steam entrainment of the oils which are collected in a graduated tube; after cooling, direct reading from this tube of the volume of the oils separated from the destillate.