泡塑吸附TMK-TBP液珠萃取比色测定痕量金

LIQUID PELLET EXTRACTION-COLORIMETRY FOR DETERMINATION OF TRACE GOLD WITH 4, 4-BIS-(DIMETHYLAMINO)-THI-OBENZOPHENONE AND TRIBUTYLPHOSPHATE AFTER ADSORPTION BY POLYURETHANE FOAM

本文提出了在磷酸-磷酸氢二钠介质中(pH=5),在F作为增敏剂的条件下,以10μl TBP萃取金(I)与TMK生成的有色络合物的方法。待测元素含量范围是0.0002—20.0g/t金。该方法灵敏度高,准确度好,操作简单、快速,成本低。运用于野外就地采样和测试。

A procedure of the extraction of gold (I)-TMK colour complex with 10 μl tributylphos-phate (TBP) is described. The phosphoric acid and di-sodium hydrogen phosphate (pH=5)as a sensitizer (F) reagent are adopted. The concentration range of determination is 0.0002-20.0 g Au/t. This method is sensitive (0.2 ppb),accurate, simple, rapid and convenient-inoperation, and of low cost. It is suitable for in-site sampling and detection in the field.