Figure 8.

Comparison of the composition (mass%) of CEs and WEs determined in this work with two previous reports. (a) Side-by-side comparison of the composition of CEs determined in this work with that determined by Nicolaides et al.⁴; (b) the composition of WEs determined in this work; and (c) the composition of WEs determined by Butovich et al.⁵⁶ The bar graphs for the two reports^4,56 were generated from the data provided in the two references (no standard deviation information was reported). The compositions determined in this work were the average of two samples; the error bars indicate one standard deviation. The experimental conditions used in this experiment were identical to those described in Figure 7.