用NaNTU掩蔽Hg^(2+),Ag^+和Cu^(2+)的干扰——还原为金属锑试法鉴定锑

Eliminating the Interference of Hg^(2+),Ag^+,Cu^(2+) with NaNTU——Identifying Sb Using Deoxidization Method

在用锡还原锑(Ⅲ)或锑(Ⅴ)试法鉴定锑时,Hg2+,Ag+和Cu2+将产生干扰.实验发现,用N-烯丙基-N′-(对苯磺酸钠)硫脲可同时掩蔽Hg2+,Ag+和Cu2+的干扰,与传统的利用沉淀分离消除干扰的方法相比,操作非常简便,掩蔽也很彻底.

When use Sn to deoxidize Sb（Ⅲ） or Sb（Ⅴ） to identify Sb, Hg^2＋, Ag^＋ and Cu^2＋ always interfere. Experiments find that using N-allyl-N＇-（sodium-p-henzenesulfonate） thiourea can eliminate the interference of Hg^2＋, Ag^＋ and Cu^2＋ at the same time. Compared with the traditional sedimentation method, this method is easier, simpler to operate and more effective.