Objective: To establish the quantitative analysis method for borax

boric acid and total boron in Zhengshiming diyanye. Method: Borax

boric acid and total boron in Zhengshiming Diyanye were determined by micro-titration and constant titration. Result: The linear range of borax was from 8-16 mg

and the regression equation was Y=504.52X-0.14( r=0.998 8) with the average recovery rate 98.29%(n=6

RSD 1.37%). The linear range of boric acid was from 50-70 mg

and the regression equation was Y=141.74X+0.07

r=0.999 7 with the average recovery rate 97.02%(n=6

RSD 0.78%). The linear range of total boron was from 0.8-1.2 mmol

and the regression equation was Y=9.51X-0.05

r=0.999 7 with the average recovery rate 95.29%(n=6

RSD 0.75%). Conclusion: This method is simple with high accuracy and easy to popularize

can provide foundation for the quality control of Zhengshiming diyanye.