The method employed Rhodamine B(RB) as an acid sensor,due to its character that uv-vis absorbency would change in acidic condition.

• 以罗丹明B为试踪剂,在酸性条件下罗丹明B的紫外吸收随酸浓度而变化,通过其紫外吸光度的改变来反映酸度的变化。