Page 95 - rise 2017

Figure 1. PCA distribution charts of chicken, onion, banana, plastic, straw and control.

Adulteration of plastics
In order to identify the adulterated plastic frying oils from the non-plastic frying oils, edible samples
(chicken, onion and banana) were fried in the palm oil with plastics. PC1 and PC2 accounted for 87%
and 12%, respectively; thus, 99% of the variance was accounted by the first two principal components
(Figure 2). Based on the twelve variables, the adulterated oils samples were all in the negative side of
PC1, while, unadulterated oils sample were all in the positive side of PC1. This clearly indicates the
differences between the adulterated frying oils and the unadulterated frying oils. All adulterated
samples were grouped together near the center of the score plot reaching near the plastic sample. Even
though the control is in the negative side of PC1, the data point of control sample is still far from the
group of adulterated sample points, indicating the notable absence of material in control sample.

Figure 2: PCA classification of frying oils adulteration of plastics