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Caffeine recovery systems

Caffeine is an essential raw material for the pharmaceutical, food and related industries. It may be obtained either by a decaffeination process or be manufactured synthetically. [Pg.132]

Tablets have been the most common matrix for the SFE of active components. Pure supercritical CO2 has been used in the extraction of megestrol acetate (145), caffeine and vanillin (146), and ibuprofen (147). In the first case, a comparison between two SFE systems was done and various support materials were assessed for their suitability as adsorbents. Methanol was used as the modifier for the extraction of benzodiazepines from tablets or capsules (148) in a static and dynamic mode for 5 and 10 min, respectively, at 65°C and 101 bar. The eluate was analyzed using GC-MS. Psoralen and isopsoralen have been extracted from Baishi pills and Baidianfeng capsules-belonging, to traditional Chinese medicines—using supercritical CO2 modified with tricloromethane (149). The determination of the analytes was performed by GC. By the standard additions method, recoveries were 97.8 101.2% with RSDs (three replicates) less than 2.01%. In the same way, SFE has been applied to the isolation of pentosalen (also known as imperatorin) from Cnidium monnieri cusson powder (a traditional Chinese medicine) (150). This experiment was carried out with a homemade SFE system with the use of replicates) were 3.9% and 1.7%. The SFE method was more efficient than the... Tablets have been the most common matrix for the SFE of active components. Pure supercritical CO2 has been used in the extraction of megestrol acetate (145), caffeine and vanillin (146), and ibuprofen (147). In the first case, a comparison between two SFE systems was done and various support materials were assessed for their suitability as adsorbents. Methanol was used as the modifier for the extraction of benzodiazepines from tablets or capsules (148) in a static and dynamic mode for 5 and 10 min, respectively, at 65°C and 101 bar. The eluate was analyzed using GC-MS. Psoralen and isopsoralen have been extracted from Baishi pills and Baidianfeng capsules-belonging, to traditional Chinese medicines—using supercritical CO2 modified with tricloromethane (149). The determination of the analytes was performed by GC. By the standard additions method, recoveries were 97.8 101.2% with RSDs (three replicates) less than 2.01%. In the same way, SFE has been applied to the isolation of pentosalen (also known as imperatorin) from Cnidium monnieri cusson powder (a traditional Chinese medicine) (150). This experiment was carried out with a homemade SFE system with the use of replicates) were 3.9% and 1.7%. The SFE method was more efficient than the...
See other pages where Caffeine recovery systems is mentioned: [Pg.132]    [Pg.132]    [Pg.132]    [Pg.132]    [Pg.511]    [Pg.552]    [Pg.389]    [Pg.210]    [Pg.80]    [Pg.100]    [Pg.5034]    [Pg.316]    [Pg.320]   


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