Ma electrode osankha ma ion ndi sensa yamagetsi yomwe mphamvu yake imakhala yolunjika ndi logarithm ya ntchito ya ma ion mu yankho linalake. Ndi mtundu wa sensa yamagetsi yomwe imagwiritsa ntchito mphamvu ya nembanemba kudziwa ntchito ya ma ion kapena kuchuluka kwake mu yankho. Ndi ya electrode ya nembanemba,amene Gawo lalikulu ndi nembanemba yozindikira ya electrode. Njira yosankha ma ion electrode ndi nthambi ya kusanthula kwa potentiometric. Nthawi zambiri imagwiritsidwa ntchito mu njira yolunjika ya potentiometric ndi potentiometric titration. Chitsanzo cha utility chimadziwika mu zake wmitundu ya ntchito ya ideKomanso, it akhoza kuyeza kuchuluka kwa ma ayoni enaake mu yankho. Kuphatikiza apo, inet sichikhudzidwa ndi amtundu ndi kutayirira ndi zinthu zina za chothandizira.
Njira yoyezera ma electrode osankha ma ion
Pamene ma ayoni oyezedwa mu yankho la electrode akhudza electrode, kusamuka kwa ma ayoni kumachitika mu aquifer ya ion selective electrode membrane matrix. Pali kuthekera kwa kusintha kwa mphamvu ya ma ayoni osuntha, komwe kumasintha kuthekera pakati pa malo a membrane. Chifukwa chake, kusiyana kwa kuthekera kumapangidwa pakati pa electrode yoyezera ndi electrode yowunikira. Ndikoyenera kuti kusiyana kwa kuthekera komwe kumapangidwa pakati pa electrode selective ion ndi ma ayoni omwe ayenera kuyezedwa mu yankho kutsatire Nernst equation, yomwe ndi
E=E0+ log10a(x)
E: Kuthekera koyezedwa
E0: Mphamvu yamagetsi yokhazikika (yokhazikika)
R: Chokhazikika cha mpweya
T: Kutentha
Z: Ionic valence
F: Faraday nthawi zonse
a(x): ntchito ya ayoni
Zikuoneka kuti mphamvu ya electrode yoyezedwa imagwirizana ndi logarithm ya ntchito ya ma ioni a "X". Pamene coefficient ya ntchito ikukhalabe yokhazikika, mphamvu ya electrode imagwirizananso ndi logarithm ya kuchuluka kwa ma ioni (C). Mwanjira imeneyi, ntchito kapena kuchuluka kwa ma ioni mu yankho kungapezeke.
Nthawi yotumizira: Januwale-30-2023