论文部分内容阅读
用NH4SCN、(C4H9) 4NCl为释放剂 ,选择性螯合滴定法测定钼铁中的铁。先用EDTA螯合Fe3+和其他阳离子 ,然后加入NH4SCN和 (C4H9) 4NCl,分解Fe -EDTA螯合物、释放出的EDTA ,用In(NO3) 3标准溶液返滴定 ,而Fe3+形成 [(C4H9) 4N]3[Fe(SCN) 6 ]缔合物。实验结果表明 ,一般常见阳离子完全不干扰测定铁 ,该法已成功地用于测定钼铁中的铁含量。
Determination of Iron in Ferromolybdenum with Selective Titration with NH4SCN and (C4H9) 4NCl as Releasing Agents. First, EDTA is used to chelate Fe3 + and other cations, then NH4SCN and (C4H9) 4NCl are added to decompose the Fe-EDTA chelate and release the EDTA, back titration with In (NO3) 3 standard solution and Fe3 + 4N] 3 [Fe (SCN) 6] complex. The experimental results show that common common cations do not interfere with the determination of iron at all, and the method has been successfully used to determine the iron content in ferromolybdenum.