双波长分光光度法具有许多单波长法所没有的优点,因而日益受到人们的重视。有关双波长法的精密度已有文论述,但均仅是针对双波长仪器而言。目前国内专用双波长仪器尚不普遍,采用单波长仪器完成双波长测定者较多,用这种单波长仪器代替双波长仪器进行测定的精密度便是人们关心的问题,对其进行研究显然是有意义的。本文对这种情况下单组分测定的精密度 Double-wavelength spectrophotometry has many advantages that single-wavelength method does not have, and therefore has drawn increasing attention. The precision of the dual wavelength method has been discussed, but only for dual wavelength instruments. The current domestic dual-wavelength instrument is not universal, the use of single-wavelength instrument to complete the dual-wavelength determination of those who use this single-wavelength instrument instead of dual-wavelength instrument for the determination of precision is a matter of concern, the study is clearly meaningful. This article on the determination of the precision of single-component in this case