廢门大了化学化工学院 Analytical Chermistry分析化学 2.3.5误差的传递 Propagation of Error A sample is weighed and dissolved. The analyte is the only colored species and the samples content is measured by absorbance Separation measurements are made for a blank and sample. The algebraic expression is analyte sample -A b blank /8 100(A Ablank v yM Analyte sample sample ebw sample each step is associated with some error(random or determinate) 误差传递的方式取决于误差的性质(系统误差或随机误差 取决于分析结果与测量值之间的化学计量关系(计算方式) 2005-09 分析化学教程(2005-2006学年) GXQ5化学化工学院 Analytical Chemistry 分析化学 2005-09 分析化学教程（2005-2006学年) GXQ5 2.3.5 误差的传递 Propagation of Error 误差传递的方式取决于误差的性质（系统误差或随机误差）， 取决于分析结果与测量值之间的化学计量关系（计算方式）。 A sample is weighed and dissolved. The analyte is the only colored species and the sample’s content is measured by absorbance. Separation measurements are made for a blank and sample. The algebraic expression is Canalyte = (Asample – Ablank)/b sample sample blank sample bW A A V M analyte  100( ) % − = each step is associated with some error (random or determinate)