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利用适量正辛醇可以显著降低非离子表面活性剂Triton X-100浊点的特性,以8-羟基喹啉为螯合试剂,建立了一种醇诱导低温浊点萃取-火焰原子吸收测定痕量铟的新方法。探讨了不同因素对萃取效率的影响。研究表明在加入1.5 mL正辛醇后,Triton X-100的浊点可以降至35℃。最佳萃取条件为:pH 6.0,0.01 mol/L 8-羟基喹啉溶液1.0 mL,体积分数15%Triton X-100溶液0.8 mL,平衡温度40℃,平衡时间30 min。在最佳条件下,铟的富集倍数为42,检出限为0.56μg/L。利用该方法对标准水系沉积物和环境样品中的铟进行了萃取富集与测定。
The use of n-octanol can significantly reduce the cloud point of non-ionic surfactant Triton X-100, 8-hydroxyquinoline chelating reagent, the establishment of an alcohol-induced low temperature cloud point extraction - flame atomic absorption spectrometry trace New method of indium. The effects of different factors on the extraction efficiency were discussed. Studies have shown that after adding 1.5 mL of n-octanol, the cloud point of Triton X-100 can be reduced to 35 ° C. The optimum extraction conditions were as follows: 1.0 mL of pH 6.0, 0.01 mol / L 8-hydroxyquinoline solution and 0.8 mL of 15% Triton X-100 solution. The equilibrium temperature was 40 ℃ and the equilibration time was 30 min. Under optimal conditions, the enrichment factor of indium is 42 and the detection limit is 0.56 μg / L. The method was used to enrich and determine indium in standard sediments and environmental samples.