Acta Chimica Sinica ›› 1953, Vol. 19 ›› Issue (2): 106-108. Previous Articles    

钼及钨之测定Ⅷ——用钼酸钡法测定钼(二)

梁树权, 谭佩幸   

  1. 中国科学院物理化学研究所, 中国科学院物理化学研究所
  • 收稿日期:1952-09-30 出版日期:1953-06-15 发布日期:2013-06-04

The Determination of Molybdenum and Tungsten Ⅷ.The Estimation of Molybdenum as Barium Molybdate(Ⅱ)

by Shu-Chuan Liang, Pui-Hang Tam   

  1. Institule of Physical Chemistry,Academia Sinica
  • Received:1952-09-30 Online:1953-06-15 Published:2013-06-04

In a previous paper, [Liang and Hsii: Jour. Chinese Chew. Soc. 17, 90 (1950)],we reported on the optimum conditions for determinin;, molybdenum as barium molybdate. In the present investigation it is found that the barium molybdate method may be employed to determine as low as b mg of MoO3 in 200 ml of solution. The minimum concentration of excessive precipitant may be set at 5×10-4 M, below which complete precipitation can not be attained. The presence of any metal that forms a slightly soluble hydroxide in solutions with a plf value edual to or greater than 6 is objectionable. The method requires the absence of even small quantities of zinc, a,nd permits the presence of less than 0.01 M of magnesium.