本法测定六氟化铀中的锑,是在7.5N盐酸介质中,有硫酸铵及硝酸钾的存在下,用醋酸异成酯将锑(V)萃取分离后,在pH1.5的缓冲溶液中与乙基紫溶液振荡反应,在有机相生成紫蓝色络合物。于波长592 mm处进行分光光度测定,其摩尔消光系数为9.1×10~4。锑含量在0.2～2.0μg/5 ml范围内服从比尔定律。其精密度为7.4%,本法可检出0.2 ppm锑。 This method for the determination of antimony hexafluoride in the presence of ammonium sulfate and potassium nitrate in 7.5N hydrochloric acid medium is extracted with antimony (V) acetate isoparboxylate, the buffer solution pH 1.5 With ethyl violet solution oscillation reaction, the organic phase to generate purple-blue complex. Spectrophotometry was carried out at a wavelength of 592 mm with a molar extinction coefficient of 9.1 × 10 -4. Antimony content in the range of 0.2 ~ 2.0μg / 5 ml obey Bill’s law. Its precision is 7.4%, this law can detect 0.2 ppm antimony.