Pregled bibliografske jedinice broj: 321512
Direct Potentiometric Measurements of Cysteine by Using Iodide-Selective Electrode
Direct Potentiometric Measurements of Cysteine by Using Iodide-Selective Electrode // Croatica Chemica Acta, 67 (1994), 4; 543-551 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 321512 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Direct Potentiometric Measurements of Cysteine by Using Iodide-Selective Electrode
Autori
Bralić, Marija ; Radić, Njegomir
Izvornik
Croatica Chemica Acta (0011-1643) 67
(1994), 4;
543-551
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
potentiometric determination; cysteine; iodide-selective electrode
Sažetak
Potentiometric determination of cysteine (Cys) in aqueous solution by using iodide-selective electrode with (Ag2S + AgI) membrane is described. The analytical behavior of this electrode is discussed in terms of the potential vs. concentration curve, potential us. pH curve, and potential-time response. The equilibrium potentials observed during serial dilution or standard addition, under constant pH and ionic strength, are plotted against log c(Cys). The linear response with a slope 58 mV {; ; p(Cys)}; ; -1 has been obtained in the concentration range from 3 x lO-3 to under 10-5 M. The change in potential in the tested concentration range of Cys (also designated as RSH) indicates RSAg coating formation at the exposed membrane surface. On the basis of potentiometric experiments, the solubility product of RSAg precipitate has been determined. The calculated mean value was pKsp(RSAg) = 18.66 ± ; ; 0.08.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
