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一、观察法:粉剂或可湿性粉剂,如果外表显现受潮性特征,药粉呈团结块,或压一压表现湿气重甚至结块者,药效已丧失。液剂如静置后浑浊不清或有絮结沉淀,说明已失效变质。乳剂如静置后出现油水分层,或发生絮结及沉淀,也是失效变质的表现。二、悬浮法:对可湿性粉剂,可取药1两,倒入瓶中,加少量水调成糊状,再加清水搅拌均匀,静置于桌上。未变质的粉粒极细,悬浮性好,沉淀慢而少;已变质的则悬浮性差,沉淀快而多。
First, the observation method: powder or wettable powder, if the appearance of dampness showed characteristics of the powder was clumped, or pressure and pressure performance of a wet or even agglomeration, the efficacy has been lost. Liquid after standing turbid or flocculation precipitate, indicating that the deterioration has deteriorated. Emulsion, such as standing after the oil-water stratification, or flocculation and precipitation, but also the performance of failure metamorphism. Second, the suspension method: wettable powder, desirable medicine 1 two, into the bottle, add a small amount of water into a paste, add water Stir, static placed on the table. Unmodified fine particles, good suspension, slow and less precipitation; metamorphism is poor suspension, sedimentation faster and more.