MULTIVARIATE CONTROL CHARTS - CONTROL CHARTS FOR CALIBRATION CURVES

被引：93

作者：

MESTEK, O ^{[1
]}

PAVLIK, J ^{[1
]}

SUCHANEK, M ^{[1
]}

机构：

[1] PRAGUE INST CHEM TECHNOL,DEPT MATH,CS-16628 PRAGUE 6,CZECH REPUBLIC

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1994年 / 350卷 / 06期

关键词：

D O I：

10.1007/BF00325603

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The proposed multivariate control charts for p-dimensional vectors are an extension of the conventional control charts for one variable. The controlling quantity is the Mahalanobis distance of vector x from the central value vector x..: D = (x - x..)T. C-1. (x - x..), where C is the covariance matrix estimate. The quantity D has Hotelling's T2 distribution. A PC program was set up for the automatic graphical construction of such charts. The program draws the sequential chart of the quantity D as well as the position of the vectors x in the p dimensional control ellipsoid in the axes of the principal components. In this way a control chart was developed for the calibration curve in the photometric determination of Fe3+ with sulfosalicyclic acid. Vector x was formed by absorbance values for the calibration curve points (p = 5). The chart can assist in detection of even small disturbances of the calibration curve.

引用

页码：344 / 351

页数：8