Home › Raqi Shubietah › Publications › Published Researches

Voltammetric Behaviour and Determination of some Methylated Guanine in Presence of Copper Ions

Raqi Shubietah's picture
Mon, 2014-07-07 09:59 — Raqi Mohammad Hasan Shubietah
Journal Title, Volume, Page: 
Analytical Letters Volume 27, Issue 6
Year of Publication: 
1994
Link: 
http://www.tandfonline.com/doi/abs/10.1080/00032719408000283?journalCode=lanl20
Authors: 
R M Shubietaha
Department of Chemistry, Faculty of Science , UAE University , Al-Ain, P.O. Box: 17551, United Arab Emirates
Current Affiliation: 
Department of Pharmacy, Faculty of Medicine and Health Sciences, An-Najah National University, Nablus, Palestine
[email protected]
A Z Abu Zuhria
Department of Chemistry, Faculty of Science , UAE University , Al-Ain, P.O. Box: 17551, United Arab Emiratesb Department of Chemistry , Loughborough University of Technology , Loughborough, Leicestershire, LE11 3TU, U.K.
A G Foggb
Department of Chemistry , Loughborough University of Technology , Loughborough, Leicestershire, LE11 3TU, U.K.
Preferred Abstract (Original): 

The voltammetric behaviour of methylated guanine-MeGua-(1-methylguanine, 3-methylguanine, 7-methylguanine and 9-methylguanine) was investigated over a wide pH range by using differential pulse cathodic stripping voltammetry at hanging mercury drop electrode. Methylated guanine as well as guanine are weakly interacted with mercury, but in presence of copper ions (5.0 × 10−7 M) they adsorb at a HMDE to give one stripping peak. This peak appears to be due to adsorption of MeGua-Cu(I) complex. The dependence of the stripping peak on the various experimental conditions is considered.

Cathodic stripping behaviour suggests that MeGua can be determined by cathodic stripping voltammetry in presence of Cu(II) ions and their detection limits are comparable to those for guanine.