Sabine Geiß

Chemometrics in environmental analysis

Part 1 Chemometric methods: measurements and basic statistics experimental design and analysis of variances sampling and sampling design multivariate data analysis graphical methods data preprocessing cluster analysis factorial methods multivariate classification multivariate modelling time series analysis. Part 2 Case studies: atmosphere hydrosphere pedosphere related topics. (Part contents).

Chemometric investigations on the representativity of soil sampling

SummaryThe characterization of the heavy metal contents of a soil area is carried out by narrow screening sampling and subsequent analysis. It is possible by means of the univariate variance analysis to detect significant alterations within the tested area. The position and extent of multivariate changes of the features can be characterized more exactly with the help of multivariate statistical methods such as the combination of cluster and discriminant analytical methods or the principal component analysis. The maximum possible distance between two sampling points is determined by calculation of the autocorrelation function of the features. The number of soil samples, which is necessary for precisely determining the heavy metal contents of the investigated area, can be derived therefrom. With the help of the multivariate autocorrelation function the distance for the representative sampling of the multivariate loads by heavy metals can be described.

Multivariat-statistische Untersuchungen zur Probenahmestrategie in der Fließgewässeranalytik

SummaryA strategy for representative sampling in the analysis of river water is presented. Temporal and local variations of the concentration of 11 different water components in a selected river are recorded by means of suitable samples and the multivariate-statistical methods factor analysis and multidimensional variance and discriminant analysis in an optimal manner. By means of these results and the relation of the ascertained fluctuations of concentrations to the anthropogenic pollution in the river it is possible to draw practical conclusions with regard to sampling.