เคมี
เอกสารมาตรฐาน
สหรัฐอเมริกา
AOCS
Cc 13k-13
Chlorophyll and Chlorophyll in Vegetable Oil, Spectrophotometric Determination
2017
4
665.0288 AOCS 7th ed. 2017-2019 rev. Ref.
This method is used to determine mg/kg (ppm) of chlorophyll in cold pressed oil (e.g., virgin olive oil) and chlorophyll-related pigments (predominantly pheophytin a) in crude heated oils from spectrophotometric absorption measurements at 630, 670 and 710 nm. This method is applicable to cold pressed and expelled oils. This method is not applicable to hydrogenated oils, deodorized oils and finished products because in these processed oils the absorption maximum does not occur at 670 nm.