tailieunhanh - Determination of caffeine in the leaves and flowers of camellia chrysantha by high-performance liquid chromatography with dad detection

Caffeine (1,3,7-trimethylxanthine) is naturally found in the leaves, seeds or fruits of over 63 plants species worldwide. It is contained highly in coffee, tea, cacao beverage products. Caffeine showed good effects in enhancing performance and perception of exercise, reducing fatigue and drowsiness, and improving memory and learning effects. Although caffeine intoxications are rare, they showed its unhealthy potential factor, resulting in tachycardia, atrial arrhythmias, convulsions or even coma. Thus, the national standard technical committee has limited the caffeine content in beverage products. In this paper, we present an HPLC method for determination of caffeine. The results show optimal conditions for the rapid analysis of caffeine with high precision and accuracy which are suitable for its determination in the plant. The obtained results revealed that no caffeine is detected in the leaves and flowers of golden camellia (Camellia chrysantha (Hu) Tuyama). Thus, we may suggest that using golden camellia leaves and flowers as natural alternatives to current decaffeinated tea would avoid some unwanted side effects of caffeine. | Determination of caffeine in the leaves and flowers of camellia chrysantha by high-performance liquid chromatography with dad detection

• Hoá học
• Camellia chrysantha
• Golden Camellia
• HPLC method
• Dad detection
• High performance liquid chromatography
• Testing three proposed DNA regions
• Identification of camellia euphlebia and camellia chrysantha
• Camellia euphlebia and camellia chrysantha
• Three DNA regions
• Yellow flower tea
• Camellia thuanana
• Yellow Camellia
• Genus Camellia L
• Morphological features
• Leaves stalked
• Anastomosing venation
• Camellia chrysantha Tuyama
• Epicatechin quercetin
• Quercetin 3 O methyl ether
• Thin layer chromatography
• Nuclear magnetic resonance
• Vietnam Journal of Science and Technology
• Bài viết khoa học
• Tạp chí Khoa học Công nghệ Việt Nam
• Golden Flower Tea extract
• Sodium alginate
• di truyền học
• bài tập di truyền
• hiện tượng sinh học
• đặc tính của động vật
• đặc điểm của thực vật
• Luận văn Thạc sĩ
• Luận văn Thạc sĩ Khoa học lâm nghiệp
• Lâm nghiệp
• Nhân giống Trà hoa vàng
• Kỹ thuật nhân giống Trà hoa vàng
• Kỹ thuật nhân giống vô tính
• Khoa học nông nghiệp
• Trà hoa vàng Ba Chẽ
• Giâm hom cây trà hoa vàng
• Bảo tồn giống trà hoa vàng
• Kỹ thuật giâm cành chè