Method and apparatus for determination of an analyte and method of calibrating such apparatus
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0158506A2
公开(公告)日:1985-10-16
A method and apparatus are described for the determination of an analyte in an aqueous liquid which eliminate the biasing effect of unknown interferents which are either preformed or formed in situ during the determination. The method comprises physically contacting a sample of the liquid with an interactive composition for the analyte, measuring the spectrophotometric responses generated by such contact at a primary wavelength λ1 and one or more secondary wavelengths λ2, λ3, ...λn, and determining analyte concentration or activity using the equation:
wherein C is analyte concentration or activity, A,, A2, ...An are the spectrophotometric responses observed at λ1, λ2, ...λn, respectively, and ao, a,, and α1, a2, ...αn-1 are constants determined according to a calibrating method. Such calibrating method is an empirical means for determining and recording in a chemical analyzer the a0,a1, and α1,α2, ...an-i constants essential for making the analyte determination.
本发明描述了一种测定水性液体中分析物的方法和装置,它消除了在测定过程中预先形成或就地形成的未知干扰物的偏差效应。该方法包括将液体样品与分析物的交互组合物进行物理接触,在一个主波长 λ1 和一个或多个次波长 λ2、λ3、...λn 上测量由这种接触产生的分光光度反应,并使用公式确定分析物浓度或活性:
其中 C 是分析物浓度或活性,A,, A2, ...An分别是在λ1, λ2, ...λn处观察到的分光光度反应,ao, a, 和 α1, a2, ...αn-1是根据校准方法确定的常数。这种校准方法是一种经验方法,用于确定和记录化学分析仪中的 a0、a1 和 α1、α2、......an-i 常量,这些常量对确定被分析物至关重要。