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流动注射分析是一项湿法化学自动分析的新技术。它具有快速、精密和简便等优点,得到了广泛的应用。硫酸根的测定也提出了一些流动注射分析方法。其中以硫酸钡比浊法应用较多。但这一方法因生成的硫酸钡沉淀沉积在系统管壁和流通比色池中,会引起基线的漂移,使测定不能顺利的进行。以往的工作者都采用在样品之间交替引入碱性EDTA溶液去溶解沉积的硫酸钡。他们为此设计过各种不同的装置。但在同一管路中既要形成硫酸
Flow injection analysis is a new technology for automatic analysis of wet chemical. It has the advantages of fast, precise and simple, it has been widely used. Sulfate determination also proposed some flow injection analysis methods. Among them, the application of barium sulfate nephelometry more. However, due to the deposition of barium sulphate precipitated in the system wall and the flow-through cuvette, this method can cause baseline drift and make the measurement fail to be carried out smoothly. In the past, workers used alternating alkaline samples of EDTA to dissolve the deposition of barium sulfate. They designed a variety of different devices for this purpose. However, it is necessary to form sulfuric acid in the same pipeline