电感耦合-等离子体发射光谱法测定枸橼酸铁铵中铝残留量

Content Determination of Aluminum Residue in Ferric Ammonium Citrate by ICP-OES

目的建立测定枸橼酸铁铵中铝残留量的电感耦合-等离子体发射光谱法(ICP-OES)。方法检测波长为396.153 nm,高频入射功率为1.3 kW,雾化器流速为0.6 L/min,泵速为1.5 mL/min。结果铝质量浓度在0~5.0μg/mL范围内与吸收强度线性关系良好,线性回归方程为A=847 400 C-683.8,r=0.999 994(n=6);平均回收率为96.19%,RSD为2.39%(n=6);检出限为0.028μg/mL,定量限为0.085μg/mL。结论该方法迅速准确,专属性良好,灵敏度高,可用于枸橼酸铁铵铝残留量的控制。

Objective To establish an ICP-OES method for determination of aluminum residue in ferric ammonium citrate. Methods The detection wavelength was,the optimal high frequency input power was 1. 3 kW,the flow rate of the atomizer was 0. 6 L/min,and the pump speed was 396. 153 nm 1. 5 mL/min. Results The mass concentration of aluminum in the range of 0-5 μg/mL has a good linear relationship with the absorption intensity. The linear regression equation was A = 847 400 C-683. 8, r = 0. 999 994（ n = 6）,the average recovery was 96. 19%（ n = 6）,The RSD was 2. 39%（ n = 6）. The detection limit was 0. 028 μg/mL and the limit of quantification was 0. 085 μg/mL. Conclusion The method is rapid,accurate,specific and sensitive,which can be used for the control of aluminum residue in ferric ammonium citrate.