混合矿粉中锰钒的连续测定

Continuous testing of Manganese Vanadium in mixed ore power

试样用硫酸、磷酸、硝酸和高氯酸的混合酸分解,在适当温度下,用硝酸铵将锰、钒氧化至高价,在掩蔽干扰元素的情况下,以N-苯代邻氨基苯甲酸作指示剂,用硫酸亚铁铵标准溶液滴定。分别测定两份试液中的锰、钒合量或钒含量,用差减法计算出锰含量,从而达到锰、钒连续测定的目的。方法简便、快速,回收率Mn:99.80%～100.20%、V2O5:99.82%～100.25%,相对标准偏差Mn:2.11%～2.88%,V2O5:1.90%～2.18%。

The sample was decomposed by sulfuric acid,phosphoric acid,nitric acid,and perchloric acid.Manganese vanadium was oxidized to the high valence by ammonium nitrate in suitable tenperature,in the screen of interferential element,the Manganese vanadium total content or Manganese in the two liquor was divided to tested by titration using N-Phenylan thranilic acid as indicator and ammonium ferrous sulfate as titrant.The conten Manganese was calculated by the difference-minu method.There by the continuous testing of achieve ones. The method is easy and rapid to operate, the recovery rate is Mn： 99.80 - 100.20%, V2O5：99.82 - 100.25 %, and the relative standard deviation is Mn： 2.11% - 2.88 %, V2O5 ： 1.90 % - 2.18 %.