聚丙烯-二苯氨基脲树脂分离富集原子吸收法测定地质样品中的金

Determination of Gold in Ore by Atomic Absorption Spectrometry with Separation and Concentration of Polypropylene-Diphenyl Carbazide Resin

研究了聚丙烯 -二苯氨基脲树脂的合成及其分离富集样品中痕量金的条件。在 p H为 3.0的 HCl介质中 ,金定量吸附在聚丙烯 -二苯氨基脲树脂上 ,3%硫脲 - 0 .1 mol/ L HCl溶液洗脱 ,火焰原子吸收光谱法测定。回收率在 91 .6 %— 1 0 1 .6 %之间。可用于实际地质样品中贵金属的分离富集与测定。

In pH 3.0 hydrochloric acid,trace gold in geological sample was separated and preconcentrated quantitatively on polypropylene-Diphenyl carbazide resin column, eluted with 3% sulfourea including 0.1mol/L hydrochloric acid as eluant, and determined by atomic absorption spectrometry. The recovery of gold is in the range of 91.6%—101.6%. The method was applied to the analysis of gold in geological samples with satisfactory results.