[Isolation, extractive concentration, and determination of caffeine in the studies of blood plasma].
The optimal conditions for the isolation of caffeine from human blood by means of acetone extraction are described with special reference to the peculiarities of extraction from aqueous solutions. The possibility of concentration and purification of caffeine from blood plasma using acetone and aceton-chlorophorm mixture (2:8) as the solvents is illustrated. In addition, purification by silica-gel thin layer chromatography is discussed. Thin layer chromatography, UV-spectrophotometry, and high performance liquid chromatography are considered as potential methods for the identification and quantitative determination of caffeine.
Ia I
IaI
Korenman
V K
VK
Shormanov
N Ia
NIa
Mokshina
O A
OA
Krivosheeva
G B
GB
Golubitskiĭ
D000085:Acetates / Q000737:chemistry; D000096:Acetone / Q000737:chemistry; D002110:Caffeine / Q000097:blood* / Q000302:isolation & purification / Q000633:toxicity; D002725:Chloroform / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D053593:Forensic Toxicology / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D059625:Liquid-Liquid Extraction / Q000295:instrumentation / Q000379:methods*; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
D000085:Acetates; D000096:Acetone; D002110:Caffeine; C007650:ethyl acetate; D002725:Chloroform