Curcumin, zinc acetate, copper (II) acetate hydrate, iron (II) acetate, manganese (II) acetate tetrhydrate, ethyl alcohol, Vials, Spatula, Analytical balance, Water Bath, TLC sheets, Parafilm, Centrifuge. METHODS: Curcumin and metal ion salts were dissolved in ethyl alcohol. The metal ion solution was then added to the curcumin solution. All eight different mixtures were then put into the water bath at 37 oC. The complexes were then isolated, washed and dried and used for analysis. I had two variables: 1) different metal ions 2) different concentrations of curcumin. Different concentrations were mixed together with a 1:1 ratio of curcumin to metal ions and a 2:1 ratio to see what the effect of the curcumin would be. My sample size was eight. I isolated the complexes and got their weight, This was used to calculate the yield of the complexes that were collected. These complexes were analyzed using mass spectrometry in order to get their molecular weight.
I found that all four metal ions formed complexes and there was a clear precipitate. The colors varied and I was able to isolate them. Mass spectra of all the complexes revealed the presence of curcumin and metal ions in them. Copper and Iron had a tendency to form a 2:1 complex in the 1:1 experiment. In the 2:1 experiment they formed both a 1:1 and 2:1 complex. Zinc and manganese had a tendency to form 1:1 complexes with curcumin.
My conclusion is that curcumin has an ability to form strong complexes with metal ions It created a complex with all the metal ions we studied which we were then able to isolate. Since it is known that curcumin enters the brain it is possible that it may help in AD by getting rid of excess metal ions.
This project Curcumin, a house-hold asian spice can remove excess metal ions from the brain and help Alzheimer's
Science Fair Project done By Meenakshi T. Mukherjee