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本文扼要地介绍了正交设计在铜合金中微量磷测定分析方法研究中的应用。为了提高方法的灵敏度,必须选择最佳分析条件。根据影响因素和期望试验次数,确定为4因素3水平。用Lg(3)~4正交表制订试验方案。即以分析的工作曲线斜率b、纵截距a值为指标,予以计分,并求得各种不同条件试验的工作曲线斜率、纵截距的平均得分,以求得各因素K_1、K_2、K_3及R值,进而确定最佳分析条件。工作曲线参数用简单程序计算器解回归方程。笔者认为正交设计与回归计算应用于化学分析中确定最佳条件是有效的。
This article briefly introduces the application of orthogonal design in the determination of trace phosphorus in copper alloys. In order to increase the sensitivity of the method, the best analytical conditions must be selected. According to the influencing factors and the expected number of tests, it is determined as 4 factors and 3 levels. Using Lg (3) ~ 4 orthogonal table to formulate the experimental plan. That is to say, the slope of the working curve b and the value of the longitudinal intercept a are used as indexes to obtain the average scores of the slope and the longitudinal intercept of the working curve under various conditions to obtain the factors K_1, K_2, K_3 and R value, and then determine the best analysis conditions. Working curve parameters with simple program calculator solution regression equation. I believe that the orthogonal design and regression calculations used in chemical analysis to determine the best conditions is effective.