目前,在国内双波长分光光度法的应用日趋广泛,在单波长仪器上完成测定者亦不在少数。前文就单波长仪器用于双波长分光光度单组分测定的精密度作了研究及论述。对于双组分或存在干扰组分时通常应用双波长等吸收法测定,本文拟对这种情况下的双波长测定精密度作一研究。 (一)精密度公式的推导及研究由双波长分光光度法原理得 At present, the application of dual-wavelength spectrophotometry is becoming more and more widespread in China. The previous article used a single-wavelength instrument for dual-wavelength spectrophotometric single-component determination of the precision made a study and discussion. For two-component or interfering components are usually used when the determination of dual-wavelength absorption method, this article intends to study the dual-wavelength precision of this case to make a study. (A) The derivation and study of the precision formula is derived from the principle of dual-wavelength spectrophotometry