【摘 要】
：
在酸性介质中,从NaFeEDTA解离出的Fe3+与KSCN反应,生成的红色络合物在483nm处会产生强吸收.基于这一原理,建立了顺序注射光度法测定强化酱油中NaFeEDTA含量的方法.线性范围5.
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在酸性介质中,从NaFeEDTA解离出的Fe3+与KSCN反应,生成的红色络合物在483nm处会产生强吸收.基于这一原理,建立了顺序注射光度法测定强化酱油中NaFeEDTA含量的方法.线性范围5.0～100.0mg/L,检出限(3σ)1.4 mg/L,相对标准偏差1.7％(n=11,20.0 mg/L),采样频率60/h.回收率在95％～109％之间,实际样品测定结果与推荐方法一致.本法比推荐方法节省试剂99％,并省去醇沉步骤.方法简单,快速,易于自动化,已用于实际样品的测定.
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