液膜法分离富集与测定微量砷

SETERMINATION OF MICROAMOUNTS OF ARSENIC AND SEPARATION ENRICHMENT OF ARSENIC WITH LIQUID MEMBRANES

L113B-液体石蜡-磺化煤油-NaOH液膜体系研究了砷的迁移富集行为。实验结果表明,在适宜条件下,As3+的迁移富集率在99.2%以上。在此条件下,许多共存离子如Fe3+、A l3+、Ca2+、Mg2+、Mo6+、Cu2+、Pb2+、Zn2+、Sn2+、N i2+、Sb3+、Co2+、Cd2+等;S iO32-、SO42-、PO43-、C l-、NO3-、C lO4-等,都不渗透进入此液膜。只有As能从这些离子中得到满意的分离。此法用于分离富集测定钼精矿、钼铁中的砷,结果十分满意。

The transport enrichment of As^3＋ through the liquid membrane system of L113B -liquid paraffin -sulphonated kerosene and NaOH liquid membrane system has been Studied. Experimental results show that the transport rate of arsenie in 10 min is above 99.2%. In this case many co -ions, such as Fe^3＋、Al^3＋、Ca^2＋、Mg^2＋、M^6＋、Cu^2＋、Pb^2＋、Zn^2＋、Sn^2＋、Ni^2＋、Sb^3＋、Co^2＋、Cd^2＋等;SiO3^2-、SO4^2-、PO4^3-、Cl^-、NO3^-、ClO4^- etc. can not transport through this liquid membrane. So As^3＋ can be separated from these ions with satisfactory. The method can be applied to the determination of As in molybdefium concentrate and ferromolybdenum, the results are satisfactory.