负载8-羟基喹啉的活性炭吸附富集—分光光度法测定水中痕量钨(Ⅵ)

摘要

拟定了用负载8-羟基喹啉的活性炭对水中痕量钨(Ⅵ)进行预富集的方法，探讨了活性炭吸附钨(Ⅵ)及有机试剂的作用机理。在实验条件下，100mg活性炭负载8-羟基喹啉后，可以大大提高对钨(Ⅵ)的吸附效果，同时除去干扰测定的金属离子，最后用分光光度法测定水中痕量钨(Ⅵ)。利用本方法对温泉水样品中的痕量钨(Ⅵ)进行分析测定，结果令人满意。%Accumulation of W(Ⅵ) was studied using active carbon impregnated with 8-hydroxyquinoline. The optimal conditions were selected. The mechanism of adsorption of W(Ⅵ) by active carbon and the mechanism of the effect of 8-hydroxyquinoline was also discussed. By this process, the adsorption capacity of active carbon for W(Ⅵ) was greatly improved, and W(Ⅵ) can be separated from many ions such as Fe3+, Cu2+, Co2+, Ni2+, Mn2+, Hg2+, Cd2+, Zn2+, Pb2+, Sn2+, Al3+, Ti(Ⅵ) etc. This method is simple, sensitive, rapid and repeatable, it has been used to determine trace W(Ⅵ) in spring water with satisfactory results.