I-electrode ekhethiweyo ye-ion
I-electrode ekhethiweyo ye-ion yi-sensor ye-electrochemical enobuchule bayo buhambelana ne-logarithm yomsebenzi we-ion kwisisombululo esithile. Luhlobo lwe-sensor ye-electrochemical esebenzisa amandla e-membrane ukumisela umsebenzi we-ion okanye uxinzelelo kwisisombululo. Yeye-membrane electrode,obani Icandelo eliphambili yi-membrane yokuva ye-electrode. Indlela ye-electrode ekhethiweyo ye-ion lisebe lohlalutyo lwe-potentiometric. Isetyenziswa ngokubanzi kwindlela ye-potentiometric ethe ngqo kunye ne-potentiometric titration. Imodeli yokusetyenziswa ibonakaliswa kwi yayo i-wuluhlu lwesicelo se-ideNgaphezu koko, it inokulinganisa ukuxinana kwee-ion ezithile kwisisombululo. Ukongeza, mnat ayichaphazeleki yi iumbala kwaye ukudumba kunye nezinye izinto ze i-reagent.
Inkqubo yokulinganisa i-electrode ekhethiweyo ye-ion
Xa ii-ion ezilinganisiweyo kwisisombululo se-electrode zidibana ne-electrode, ukufuduka kwee-ion kwenzeka kwi-aquifer ye-ion selective electrode membrane matrix. Kukho ithuba lokutshintsha kwetshaja yee-ion ezifudukayo, nto leyo etshintsha amandla phakathi kwe-membrane surfaces. Ngoko ke, umahluko onokubakho uvela phakathi kwe-electrode yokulinganisa kunye ne-electrode yesalathiso. Kungcono ukuba umahluko onokubakho uvele phakathi kwe-electrode selective ion kunye nee-ion eziza kulinganiswa kwisisombululo uvumelane ne-Nernst equation, eyi-
E=E0+ log10a(x)
E: Amandla alinganisiweyo
E0: Amandla e-electrode aqhelekileyo (ahlala ekho)
R: I-gas constant
T: Ubushushu
Z: I-Ionic valence
F: I-Faraday constant
a(x): umsebenzi we-ion
Kuyabonakala ukuba amandla e-electrode alinganisiweyo alingana ne-logarithm yomsebenzi wee-ions "X". Xa i-activity coefficient ihlala ingaguquki, amandla e-electrode alingana ne-logarithm yoxinzelelo lwee-ion (C). Ngale ndlela, umsebenzi okanye uxinzelelo lwee-ions kwisisombululo sinokufunyanwa.
Ixesha lokuposa: Jan-30-2023