(2 ) the method of determining the concentration of tbh is studied in this paper . the concentration of normal-amount tbh can be determined by kios oxidation . the presence of hnoa in the titration media has no effect on the tritration results . the concentration of trace-amount tbh can be determined by colorimetric methodising paradimethylaminobenzaldehyde as a color reagent (2)研究了tbh浓度的测定方法。kio3氧化法能有效测定常量tbh的浓度,tbh溶液中存在一定浓度的hno3时对滴定结果没有影响。以对二甲氨基苯甲醛为显色剂,采用比色法能测定微量tbh的浓度。