ICP-AES法测定精选铌钽矿中高含量Nb_2O_5,ZrO_2及稀土总量

Determination for High Content Nb_2O_5,ZrO_2,∑REO in Niobium Tantalum Concentrate by ICP-AES

样品经氢氧化钠-过氧化钠熔融分解,在酒石酸存在下,用盐酸酸化,加入几滴氢氟酸,使铌,锆充分溶解,而稀土在酒石酸存在下不会生成氟化稀土沉淀。经稀释后,以ICP-AES法测定。测定范围：Nb2O51%-10%;稀土氧化物总量3%-30%;ZrO21%-60%。

Sample decomposed with fused sodium hydroxide-sodium peroxide and acidified by hydrochloric acid with tartaric acid.To solve niobium and zirconium completely,hydrofluoric acid was added and the rare earth remain in the solution.The solution was diluted and detected by ICP-AES.Mensurating scale： Nb2O5 1%～10%;ZrO2 1%～60%;∑REO 3%～30%.