TY  - BOOK
AU  - Heba Aly Mohammad Marzouk
AU  - Eman Yossri Frag , 
AU  - Marwa Elbadry Mohamed , 
TI  - Determination of some metal ions using carbon paste electrodes / 
PY  - 2021///
CY  - Cairo : 
PB  - Heba Aly Mohammad Marzouk , 
KW  - Chromium
KW  - Modified CPE
KW  - Sensor
N1  - Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical Chemistry; Issued also as CD
N2  - In 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)
ER  -