Ion selective electrode shine firikwensin electrochemical wanda yuwuwar sa madaidaiciya tare da logarithm na ayyukan ion a cikin wani bayani da aka bayar.Wani nau'in firikwensin lantarki ne wanda ke amfani da yuwuwar membrane don tantance ayyukan ion ko maida hankali a cikin bayani.Yana cikin membrane electrode,wanda core bangaren shine ji na membrane na lantarki.Hanyar zaɓin lantarki na ion reshe ne na bincike na potentiometric.Ana amfani da shi gabaɗaya a cikin hanyar potentiometric kai tsaye da titration mai ƙarfi.An siffanta samfurin kayan aiki a cikin da wide aikace-aikace kewayon.Bugu da ƙari, it iya aunawa ƙaddamar da takamaiman ions a cikin maganin. Bugu da kari, it ba ya shafa dalauni kuma turbidity da sauran dalilai na reagent.
Tsarin aunawa na ion zaɓin lantarki
Lokacin da ions da aka auna a cikin maganin lantarki suna tuntuɓar lantarki, ƙaurawar ion yana faruwa a cikin matrix na zaɓin ion electrode membrane matrix.Akwai yuwuwar canjin cajin ions masu ƙaura, wanda ke canza yuwuwar tsakanin filayen membrane.Don haka, akwai yuwuwar bambance-bambance tsakanin ma'aunin lantarki da na'urar magana.Yana da kyau cewa yuwuwar bambance-bambancen da aka haifar tsakanin ion selective electrode da ions da za a auna a cikin maganin ya dace da lissafin Nernst, wanda shine
E=E0+ log10a(x)
E: Ƙimar da aka auna
E0: Madaidaicin yuwuwar lantarki (ko da yaushe)
R: Gas akai-akai
T: Zazzabi
Z: Ionic valence
F: Faraday akai-akai
a (x): ion aiki
Ana iya ganin cewa yuwuwar wutar lantarki da aka auna ta yi daidai da logarithm na ayyukan ion "X".Lokacin da adadin ayyukan ya kasance akai-akai, yuwuwar wutar lantarki shima yayi daidai da logarithm na maida hankali ion (C).Ta wannan hanyar, ana iya samun aiki ko ƙaddamar da ions a cikin maganin.
Lokacin aikawa: Janairu-30-2023