Congener Profiles of Polychlorinated Biphenyls(PCBs) and their Sources.

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  • 異性体分布から見たポリ塩化ビフェニル（ＰＣＢｓ）の発生源に関する考察　　主成分分析および重回帰分析を用いて
  • イセイタイ ブンプ カラ ミタ ポリ エンカ ビフェニル PCBs ノ ハッセイ ゲン ニ カンスル コウサツ シュセイブン ブンセキ オヨビ ジュウ カイキ ブンセキ オ モチイテ
  • ―主成分分析および重回帰分析を用いて―

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Abstract

Principal component analysis and multiple regression analysis were applied to profiles of 19 polychlorinated biphenyl congeners (dioxin-like congeners, di-ortho congeners, IUPAC #28, #52, #101, #138 and #153) . Application of principal component analysis to PCB congener profiles of various samples (municipal solid waste, automotive shredder residue, emission gas, municipal solid waste incineration ash, environmental media and Kanechlors) yielded 3 principal components. The first principal component scores were positive for emission gas and ash, and negative for Kanechlors. From this, the first principal component was interpreted as the similarity to incineration congener pattern. Eigenvectors for penta- and hexachlorinated isomers were highly positive on the second principal component, and eigenvectors for heptachlorinated isomers were highly positive on the third principal component. From these, the second and the third principal components were interpreted as the degree of chlorination. To estimate the contributions of each PCBs source (emission gas and Kanechlors), multiple regression analyses with the 3 congener profiles (emission gas, KC-400 and KC-600) as the independent variables and profiles of the samples as the dependent variables were carried out. Results of multiple regression analyses varied with samples. Samples whose first principal component scores are negative and second ones are positive showed positive partial regression coefficients corresponding to KC-400 and KC-600. Samples whose first and second principal component scores are negative showed high positive partial regression coefficients corresponding to KC-400. Contributions of each PCBs source varied with congener. Contribution of emission gas was predominant for congeners #81, #126, #169 and #189, #105, #118, #170, #180, #28, #52, #101, #138 and #153 have a big contribution of Kanechlors.

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