Edwin T.Mombeshora ^1, , Patrick G.Ndungu ^2, , Vincent O.Nyamori ^3,

1.School Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private BagX54001, Durban, 4000, South Africa;
2.Department of Applied Chemistry, University of Johannesburg, P.O.Box17011, Doornfontein, Johannesburg, 2028, South Africa;
3.School Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private BagX54001, Durban, 4000, South Africa