000			02219cam a2200313 a 4500
003			EG-GiCUC
008			210823s2021 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.12.08.M.Sc.2021.He.D
100	0		_aHeba Aly Mohammad Marzouk
245	1	0	_aDetermination of some metal ions using carbon paste electrodes / _cHeba Aly Mohammad Marzouk ; Supervised Eman Yossri Frag , Marwa Elbadry Mohamed
246	1	5	_aتتقدير بعض أيونات العناصر بإستخدام أقطاب عجينة الكربون
260			_aCairo : _bHeba Aly Mohammad Marzouk , _c2021
300			_a72 P. : _bcharts , facimiles ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical Chemistry
520			_aIn this paper, an effective, selective, and inexpensive Cr(III) ions modified carbon paste electrode (MCPE) based on benazepril (BNZ) was developed and described. It shows a good Nernstian slope of 19.20 + 0.39 mV decade-1 over a wide linear range of 8.0 {u00D7} 10-6{u2013} 1.0 {u00D7} 10-1 mol L-1 with a fast response time (10 s) and can be applied for measurements for at least 54 days with negligible change in results. The proposed sensor was pH-Independent in the range of 2.5{u2013}6.5 and showed an excellent selectivity towards Cr(III) ions over many other cations. The Cr(III)-BNZ surface interaction was investigated by using the energy dispersive X-ray analysis (EDX) and a scanning electron microscope (SEM). The proposed MCPE was completely validated according to the EURACHEM guidelines. Lastly, the proposed electrode efficiency for trace amount determination of Cr(III) ions in various food samples was examined, and the obtained results were compared with the results of the inductively coupled plasma-optical emission spectroscopy (ICP-OES)
530			_aIssued also as CD
653		4	_aChromium
653		4	_aModified CPE
653		4	_aSensor
700	0		_aEman Yossri Frag , _eSupervisor
700	0		_aMarwa Elbadry Mohamed , _eSupervisor
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c81829 _d81829