For my research on Shea butter and the effects of storage I want to use a simple method to analyze the minerals in my fat/oil. Especially the redox-active metals because of their catalytic properties on aldehyde reaction and auto oxidation and in fat/oil products. The two most important metals are Fe2+, Cu2+, but also other redox active metals could be interesting. A method which could be used is the “Atomic Absorption Spectroscopy and Ion Chromatography” but this method is quite expensive to perform. A cheaper and preferably simpler method would be better.
For iron, I think, it is better to use colorimetric method using iron solution, and also for Cu, is it possible to try to get the CuSO4 reaction method. May be some high school chemistry helps.....
You should use AA, but color reactions like Fe(III) with SCN- and Cu with cupron may help; however, do not know the levels we are dealing with.-
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