Previous studies with rats indicate that nifedipine undergoes both hepatic and extrahepatic presystemic metabolism after peroral (po) administration, and that its bioavailability is increased and absorption delayed by concomitant administration of grapefruit juice concentrate (GJC). Hence, the effec
Extraction and measurement of prominent flavonoids in orange and grapefruit juice concentrates
β Scribed by W.E. Bronner; G.R. Beecher
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 719 KB
- Volume
- 705
- Category
- Article
- ISSN
- 1873-3778
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## Abstract A new postβcolumn derivatization system is described and applied to the determination of flavonoids in citric beverages after their separation by LC using a monolithic column. The derivatization involves the formation of the chelates of the analytes with aluminum (III) and terbium (III)