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去痛片是由氨基比林、非那西丁、咖啡因、苯巴比妥四种药物组成。但由于四种组分的紫外吸收光谱相互重叠,给直接测量带来困难。通常氨基比林的含量测定采用的是容量法,该法消耗试剂量大,需过滤等操作,费时费事。氨基比林与三氯化铁的反应为专属不稳定鉴别反应,在一般条件下难以用于定量分析,作者将此反应应用于流动注射分析(Flow Injection Analysis简写FIA)中,完成了去痛片中氨基比林的含量测定,获得满意结果。该法简便,快速、准确,消耗试剂少,不需分离过滤等操作,且FIA流路简单,具有通用性,采样频率120次/h.
Go to painkillers is aminopyrine, phenacetin, caffeine, phenobarbital four drugs. However, the UV absorption spectra of the four components overlap each other, making direct measurement difficult. Usually aminopyrine content determination using the volume method, the method consume large amount of reagents, to be filtered and other operations, time-consuming and laborious. The reaction between aminopyrine and ferric chloride is a unique and unstable reaction and is difficult to be used for quantitative analysis in general conditions. The authors applied this reaction to Flow Injection Analysis (FIA) In the determination of the content of aminopyrine to obtain satisfactory results. The method is simple, rapid, accurate, less reagent consumption, without separate filtration and other operations, and the FIA flow path is simple, with versatility, the sampling frequency of 120 times / h.