Analysis of indoor PCBs
For a paper prepared under a leadership of Dr. Lisa Emily Melimuk, an analysis over data from 2011 was prepared, dealing with indoor air concentrations of seven indicator PCB, originating from 17 different households and ambient environment in summer and in winter.
First aim of the analysis was to group the households into several clusters with similar contamination patterns (fingerprints), which was achieved using principal component analysis. Second aim was to decompose the measured PCB combination (fingerprints) as a combination of formerly used commercially available additives Delor 103 up to Delor 106. For this purpose, a specific calculation method was developed to minimize a distance between a hyperplane and point in a multidimensional space. By using this method implemnted in Maple computer algebra system, appropriate combinations of Delors (closest matching the measured pollution) were found.
14.5.2015
