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- W2051778312 abstract "This in vitro investigation was performed to study the adsorption rate constant as well as the adsorption characteristics of fluoxetine (F) to activated charcoal and its commercial formulation Carbomix powder in simulated gastric (pH 1.2) fluid environment. Ion-selective electrode (ISE) potentiometry, based on the selective, direct and continuous monitoring of F with an F-ISE constructed in our laboratory was used. The method used in the kinetic experiments consists of the rapid addition of a slurry containing the charcoal into the drug solution under stirring and continuous recording of the F-ISE potential until the establishment of equilibrium. The free ionized drug concentration at appropriate time intervals was calculated from the recorded adsorption curve and the apparent adsorption rate constant was estimated assuming pseudo first order kinetics. Within run R.S.D. of the estimates ranged from 0.24 to 11.5%, while between run R.S.D. (n=3-4) ranged from 0.90 to 13.8%. A linear relationship was found between the apparent adsorption rate constants and the amount of charcoal used with slopes (+/-S.D.) for activated charcoal and Carbomix equal to 1.14(+/-0.21) and 0.146(+/-0.009) s(-1)g(-1), respectively. Successive additions of microvolumes of F solution were made into a charcoal slurry with measurement of the F-ISE potential at equilibrium. The maximum adsorption capacity values (+/-S.D.) of activated charcoal and Carbomix were 254.8+/-1.8 and 405+/-41 mg/g, respectively while the affinity constant values (+/-S.D.) were 45.6+/-2.2 and 55.5+/-2.9 l/g, respectively. The adsorption of F to charcoals was rapid and for amounts of charcoal 10 times greater than the amount of the drug, 95% of F was adsorbed within the first 5 min. Relative to the toxic and lethal doses in cases of F intoxications, both types of charcoals tested adsorbed effectively F at gastric pH. Carbomix can be considered as appropriate charcoal formulation for medical treatment in cases of F poisoning." @default.
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- W2051778312 date "2001-01-01" @default.
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- W2051778312 title "In vitro study on fluoxetine adsorption onto charcoal using potentiometry" @default.
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- W2051778312 doi "https://doi.org/10.1016/s0928-0987(00)00187-1" @default.
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