硫氰酸盐比色法测定钨的干扰元素主要是钼。据报导,含氧类有机溶剂(如酯、醚、醇和酮类等)都能萃取钨和钼的硫氰酸盐络合物,而非极性有机溶剂(如苯、卤代烷烃、烷烃类等)都不萃取钨和钼的硫氰酸盐络合物,从而可以适当调整混合溶剂的比例,既定量萃取钨,又可分离大量钼。我们在文献[1]的基础上,用环己烷-醋酸丁酯萃取W-CNS,经实 Thiocyanate colorimetric determination of tungsten interference elements are mainly molybdenum. It has been reported that oxygen-containing organic solvents such as esters, ethers, alcohols and ketones can extract thiocyanate complexes of tungsten and molybdenum, whereas non-polar organic solvents such as benzene, haloalkanes, alkanes and the like ) Do not extract the thiocyanate complex of tungsten and molybdenum, so that the proportion of the mixed solvent can be appropriately adjusted, and tungsten can be extracted in a predetermined amount and a large amount of molybdenum can be separated. We in the literature [1] on the basis of cyclohexane - butyl acetate extraction W-CNS, the real