Objective To explore a catalytic spectrophotometic method for the quantitative determination of trace elements germanium in Chinese herbal medicine(herba hedyotis). Methods Extraction of trace element germanium in herba hedyotis was examined by using ultrasonic cleaning equipment, and the content was determined by catalytic discoloring spectrophotometry. The reaction was studied, trace germanium(IV) could accelerate potassium bromate and hydrogen peroxide oxidize neutral red in H2SO4 medium, the established...