根据苦味酸钾(KP)水溶液呈亮黄色和KClO4水溶液呈无色这一特点,用分光光度法测定了KPKClO4点火药中KP的含量,讨论了测试条件,研究了苦味酸钾的吸光度与百分含量的关系。结果表明:测定KPKClO4点火药中KP含量的方法简便,可行,使用该方法得到的实验结果的不确定度和误差分别为0.2%和1.3%。 According to the characteristic of KP aqueous solution being bright yellow and KClO4 aqueous solution being colorless, the content of KP in KPKClO4 ignition powder was determined by spectrophotometry. The test conditions were discussed and the absorbance and percentage of potassium picrate Content of the relationship. The results show that the method for determination of KP in KPKClO4 powder is simple and feasible. The uncertainty and error of the experimental results obtained by this method are 0.2% and 1.3% respectively.