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Theimpactofstorageconditionsupongentamicincoatedantimicrobialimplants

JournalofPharmaceuticalAnalysis 页数: 8 2016-12-22 15:13
摘要: Asystematicapproachwasdevelopedtoinvestigatethestabilityofgentamicinsulfate(GS)andGS/poly(lacticco-glycolicacid)(PLGA)coatingsonhydroxyapatitesurfaces.Theinfluenceofenvironmentalfactors(light,humidity,oxidationandheat)upondegradationofthedruginthecoatingswasinvestigatedusingliquidchromatographywithevaporativelightscatteringdetectionandmassspectrometry.GScoatedrodswerefoundtobestableacrosstherangeofenvironmentsassessed,withonlyanoxidizingatmosphereresultinginsignificantchangestothegentamicincomposition.Incontrast,rodscoatedwithGS/PLGAweremoresensitivetostorageconditionswithcompositionalchangesbeingdetectedafterstorageat60°C,75%relativehumidityorexposuretolight.Theeffectofγ-irradiationonthecoatedrodswasalsoinvestigatedandfoundtohavenosignificanteffect.Finally,liquidchromatography–massspectrometryanalysisrevealedthatknowngentaminesC_1,C_1aandC_2werethemajordegradantsformed.Forceddegradationofgentamicincoatingsdidnotproduceanyunexpecteddegradantsorimpurities. ... (共8页)

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