Research and New Idea

This few days I've been doing research about the effect detergent on skin. Summary of the research: Detergent removes the layer of lipids on skin because of the alkaline nature of detergents by saponification, therefore subjecting skin to contact dermatitis.

However, this runs into a problem as how can I test about the effect of detergent on skin? I decided I can use chicken skin, which has some similar properties to human skin, but how can I measure the amount of lipids on it?
there are two tests that I can try: the grease spot test, which involves pressing a spot to a plastic bag (it would turn translucent if it contains lipids) and the Sudan red lipids test, which can only be tested in liquids (like the ethanol emulsion test) and for doing this I have to puree the chicken skin first. I don't think the grease spot test is too accurate. The Sudan red test would be attemptable.

Another problem: I wanted to test the effect of pH in the detergent on the lipids on chicken skin. However, would detergent with changed pH still be detergent? This would contradict the aim of my experiment. Another option is to test the effect of temperature of detergent in affecting the lipids on skin.

In the mean time, I have another idea: the type of fruit juice stain that would be easiest to be removed by common detergent. In doing my research I came across another idea, that lemon juice is an excellent stain remover for food based stains, and seem to work better in sunlight. Possible experiment questions that arise:
1, Which fruit juice stain is removed most easily by lemon juice?
2, Which type of food stain is removed most easily by lemon juice?
3, What is the effect of sunlight on the removal of stains by lemon juice?
4, What is the effect of salt on stain removal by lemon juice?

More seemed to be needed in these areas. In the next Bio lesson I shall ask Ms Tan about the chicken skin idea, whether it is feasible.
(I am not an active blogger under all circumstances and it's scary when I saw some classmates' blogs......stressed out)