火焰原子吸收光谱法和络合滴定法测定果胶钙的含钙率
Determination of Calcium in Calcium Pectinate by Flame Atomic Absorption Spectrophotometry and Compleximetry
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摘要: 目的：测定果胶钙的含钙率。方法：果胶钙经硝酸消化处理，钙离子转变为可溶性的硝酸钙，用火焰原子吸收光谱法和EDTA－2Na络合滴定法测定果胶钙的含钙率，并对两种方法的相关性进行了考察。结果：两种测定方法回收率和精密度均较好，且相关性显著（r=0.9961)。结论：两种方法均可作为果胶钙质量控制方法。Abstract: AIM The purpose is to establish methods to determine the calcium in calcium pectinate (CaP). METHODS The organic structure of CaP was destroyed by nitric acid and the combined calcium was released as calcium nitrate. Then Flame Atomic Absorptio
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