火焰原子吸收法测定维生素B₁₂片中钴的含量

目的: 建立火焰原子吸收法测定维生素B₁₂片中钴的含量。 方法: 检测波长为240.7 nm,灯电流为4.0 mA,狭缝宽度为0.2 nm,燃气流量为2.0 L·min^-1,助燃气流量为13.5 L·min^-1。 结果: 钴浓度在0.01~0.20 mg·L^-1范围内线性关系良好(r=0.9999),平均加样回收率为98.8%(n=9)。 结论: 该方法简单,结果准确,灵敏度高,可有效控制维生素B₁₂片的质量。

Objective: To establish a flame atomic absorption spectrometry method for determination of cobalt in vitamin B₁₂ tablets. Methods: The determined wavelength was at 240.7 nm, the electric current of the light was 4.0 mA, the slit-width was 0.2 nm, the flow rate of burning gas was 2.0 L·min^-1, and the flow rate of gas to help burn was 13.5 L·min^-1. Results: There was good linear relationship in the range of 0.01-0.20 mg·L^-1 with a regression coefficient of 0.9999, and the average recovery was 98.8%(n=9). Conclusion: The method is simple,accurate, sensitive, and can be good used for controlling the of vitamin B₁₂ tablets.

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