PVC-双硫腙复膜树脂分离富集——火焰原子吸收法测定痕量金

Separation and Preconcentration with PVC-Dithizone Double Membranes Resin for Determination of Trace Gold by Flame Atomic Absorption Spectrometry

研究了PVC -双硫腙复膜树脂的合成及其分离富集金的最隹条件 .在pH为 1 .5的盐酸介质中 ,金能定量吸附在PVC -双硫腙复膜树脂上 ,采用 0 .5mol/L硫脲 -0 .1mol/LHCl溶液洗脱 ,火焰原子吸收光谱测定 ,回收率均在 95 .4%～1 0 6 .7% ,RSD <4.5 % .

The conditions for synthesis of PVC-Dithizone Double Membranes Resin and separation and concentration of gold in geological samples have been studied. Experiments show that gold was quantitatively enriched on the PVC-Dithizone Double Membranes Resin column in pH 1.5 HCl and are quantitatively eluted by 0.5mol/Lsulforea-0.1mol/L HCl. The recoveries of gold is 95.4%～106.7%, RSD<4.5% . Results obtained by analysis of a standard sample and some ore samples are satisfactory.