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Vplivi različnih medijev in pogojev testiranja na hitrost raztapljanja slabo topne učinkovine iz suspenzije = Influence of different media and testing conditions on dissolution rate of a poorly soluble drug from suspension : diplomska nalogaSitar, UrošIn vitro testi raztapljanja se danes v farmacevtski industriji uporabljajo vstevilne namene. Razvoj ustrezne metode, ki bo posnemala pogoje Ćin vivoĆ, jese posebno pomemben pri uèinkovinah, kjer je ... absorpcija omejena s hitrostjo raztapljanja. V diplomski nalogi smo preuèevali vplive razliènih pogojev na raztapljanje US-2006, ki spada med sibko kisle, slabo topne, dobro permeabilne uèinkovine. Ker je topnost eden od kljuènih parametrov, ki vplivajo na hitrost raztapljanja, je bil velik poudarek na preuèevanju le-te. Preuèevali smo vodne medije z N- cetil- N, N, N- trimetilamonijevim bromidom (CTAB) in natrijevim dodecil sulfatom (NaDS) in ugotovili, da uporaba razliènih povrsinsko aktivnih snovi (PAS) vpliva na topnost same uèinkovine. Vnasem primeru smo boljso topnost dosegli v medijih s CTAB. Za obe PAS smo dokazali, da se topnost US-2006 linearno poveèuje s koncentracijo PAS nad kritièno micelarno koncentracijo. Pri medijih s CTAB velja to v koncentracijskem obmoèju med 1 in 1,5 mžV %, medtem ko pri medijih z NaDS v koncentracijskem obmoèju med 5 in 10 mžV %. Ugotovili smo, da tudi sam pH vpliva na topnost US-2006. Pri medijih s CTAB se je topnost poveèala pri pH-jih nad 6,8, medtem ko pri medijih z NaDS pri pH-jih nad 8,0. Na Aparaturi2 (veslasto mesalo) po USP smo preuèevali razliène pogoje testiranja,ki vplivajo na hitrost raztapljanja US-2006, vgrajene v obliki suspenzije. Ugotovili smo, da razliène tehnike apliciranja in uporaba razliènih pipetirnih pripomoèkov, pomembno vplivajo na same rezultate, in sicer na hitrost raztapljanja in ponovljivost. S preuèevanjem treh razliènih hitrosti mesanja smo prisli do zakljuèka, da se z visanjem vrtljajev poveèuje hitrost raztapljanja US-2006. Ugotovili smo, da tudi pH medija vpliva na kinetiko raztapljanja nase uèinkovine. V vodno-alkoholnem mediju, in sicer 40 % izopropanol v kalijevem fosfatnem pufru, smo pri pH=10,0 dosegli hitrejsi profil kot pri pH=8,0.Type of material - undergraduate thesisPublication and manufacture - Ljubljana : [U. Sitar], 2007Language - slovenianCOBISS.SI-ID - 2089073
Author
Sitar, Uroš
Other authors
Bogataj, Marija, 1963- |
Mohar, Milojka
Topics
testi in vitro |
CTAB |
polimorfizem |
metode
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Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Pharmacy, Ljubljana | Ljubljana | FFALJ |
reading room 1 cop.
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Sitar, Uroš | ![]() |
Bogataj, Marija, 1963- | 11124 |
Mohar, Milojka | 09937 |
Source: Personal bibliographies
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