Additive C O Na
Sodium Bicarbonate 56.40 33.56 10.05
Stearic Acid 86.83 13.17 -
Sodium Stearate 85.43 9.49 4.49
Purity and elemental composition of the additive samples was determined using XPS (ESCALAB MKII) with a focused monochromatic Al K α source. No other element was found indicating sample purity and freedom from adventitious contamination
Table 1: XPS data showing normalized elemental percentage compositions used for the different additives under consideration.