是否问题

By fuming with sulfuric-phosphoric acid mixture the residual hydrofluoride was then expelled，and boron was finally determined by curcumin spectrophotometry after distillation.

同时，对所拟溶样条件下所得硼的分析果是否为全硼问了一步探讨，果证，所拟溶样条件下硼的果为全硼。