I-electrode ekhethiwe ye-ion iyinzwa ye-electrochemical enamandla ayo ahambisana ne-logarithm yomsebenzi we-ion esixazululweni esithile. Luhlobo lwenzwa ye-electrochemical esebenzisa amandla e-membrane ukunquma umsebenzi we-ion noma ukuhlushwa esixazululweni. Ingeye-electrode ye-membrane,obani Ingxenye eyinhloko yi-membrane yokuzwa ye-electrode. Indlela ye-electrode ekhethiwe ye-ion iyigatsha lokuhlaziywa kwe-potentiometric. Ngokuvamile isetshenziswa endleleni eqondile ye-potentiometric kanye ne-potentiometric titration. Imodeli yokusetshenziswa ibonakala ku i-w yayoububanzi besicelo se-ideNgaphezu kwalokho, it ingalinganisa ukuhlushwa kwama-ion athile esixazululweni. Ngaphezu kwalokho, minai-t ayithinteki yi- iumbala futhi ukudungeka kanye nezinye izici ze i-reagent.
Inqubo yokulinganisa i-electrode ekhethiwe ye-ion
Uma ama-ion alinganisiwe esixazululweni se-electrode ethinta i-electrode, ukufuduka kwama-ion kwenzeka emanzini angaphansi komhlaba we-ion selective electrode membrane matrix. Kukhona ithuba ekushintsheni kokushaja kwama-ion afudukayo, okushintsha ikhono phakathi kobuso be-membrane. Ngakho-ke, umehluko ongaba khona uvela phakathi kwe-electrode yokulinganisa kanye ne-electrode yokubhekisela. Kuhle ukuthi umehluko ongaba khona odalwa phakathi kwe-electrode selective ion kanye nama-ion azolinganiswa esixazululweni kufanele uhambisane ne-Nernst equation, okuyi-
I-E=E0+ log10a(x)
E: Amandla alinganisiwe
E0: Amandla e-electrode ajwayelekile (ahlala njalo)
R: I-gas constant
T: Izinga lokushisa
Z: I-valence ye-Ionic
F: Okungaguquki kwe-Faraday
a(x): umsebenzi we-ion
Kungabonakala ukuthi amandla e-electrode alinganisiwe alingana ne-logarithm yomsebenzi wama-ion "X". Uma i-activity coefficient ihlala ingaguquguquki, amandla e-electrode nawo alingana ne-logarithm yokuhlushwa kwama-ion (C). Ngale ndlela, umsebenzi noma ukuhlushwa kwama-ion esixazululweni kungatholakala.
Isikhathi sokuthunyelwe: Jan-30-2023