原子吸收光度法测定工业氟硅酸钠中铁、铅含量

Determination of Iron and Lead Contents in Technical Sodium Fluosilicate by Atomic Absorption Spectrometry

采用H2 O2 将Fe2 +转变为Fe3+,EDTA消除游离氟对Fe3+的干扰 ,原子吸收光度法直接在大量氟硅酸根和游离氟存在下测定铁、铅含量。该方法无须分离氟硅酸根和铁、铅 ,无须处理样品 ,采用标准加入法定量 ,简单、快速、可靠。

H_2O_2 is used to transform Fe 2+ to Fe 3+ , EDTA to eliminate the interference of Fe 3+ by free fluorine, and iron and lead contents are determined directly by AAS in the presence of a large amount of fluosilicate radical and free fluorine. The method does not require the separation of fluosilicate radical, iron and lead nor the treatment of samples, and the standard addition method is used for quantitative analysis. It is simple, rapid and reliable.