Dab tsi ua rau pH meter electrode yooj yim rau deterioration?
Qhov teeb meem zoo li no tau ntsib los ntawm ntau tus neeg siv khoom. Tom qab siv sijhawm luv luv, pH meter yuav puas lawm. Lub sijhawm siv tsis yog ntev npaum li qhov chaw tsim khoom tau hais. Puas yog cov electrode uas cov chaw tsim khoom tsim? muaj qhov nyuaj? Qhov xwm txheej no kuj tuaj yeem tshwm sim yog tias koj sim cov electrode los ntawm lwm lub chaw tsim khoom. Dab tsi tshwm sim? Koj yuav pom tom qab kev tshawb xyuas meej tias cov electrode tau tainted los ntawm nruab nrab koj saib xyuas.
Cov dej siv pH meter electrodes uas tam sim no tau tsim thiab muag yog electrodes. Lub micro-osmotic siab ntawm electrolyte nyob rau hauv lub electrode, uas tso cai rau cov electrolyte permeate cov kev ntsuas ntsuas, yog tsim nyog rau cov creation ntawm hluav taws xob raws. Thaum qhov nruab nrab muaj qhov siab siab lossis qhov siab, txoj kev hloov cov kua dej tsis zoo, muaj cov pa npuas, thiab lwm yam, qhov no tuaj yeem tiv thaiv cov electrolyte los ntawm kev xau thiab nce qhov hluav taws xob txoj kev nruab nrab impedance. Tus choj ntsev lossis txawm tias pH meter electrode yuav kis tau yog tias cov kua rov qab mus rau hauv nws. Nws tuaj yeem ua rau muaj cov tshuaj electrolyte lossis cov tshuaj lom hauv cov tshuaj lom neeg (xws li AgCl sulfide rau Ag2S).
Kev poob ntawm alkaline cov ntaub ntawv (feem ntau monovalent cations) nyob rau hauv ib tug rhiab iav daim nyias nyias nyob rau hauv ib tug muaj zog oxidizing xov xwm yuav ua mob rau lub hydration txheej thiab tshuaj lom cov electrode ntawm pH meter. Koj tuaj yeem xaiv pH meter electrode uas tuaj yeem tiv taus acid. Cov iav membrane qhov kev tiv thaiv rau acidosis tau raug txhim kho los ntawm cov txheej txheem tshwj xeeb (tshwj xeeb ntxiv ion formula) siv hauv kev tsim khoom. Lub Linearity yog rectified nyob rau tib lub sij hawm uas lub electrode lub zero muaj peev xwm sib raug rau pH 0=2.
Sab nraud ntawm pH2pH9, pH meter electrode tsis muaj kev sib raug zoo linear, thiab nws yog ib qho yooj yim rau ib tug loj tus naj npawb ntawm hydronium ions-H3O-los tsim nyob rau hauv cov kua qaub heev. Yog li ntawd, tus naj npawb ntawm H ntawm pH meter electrode nto ntog thiab pH tus nqi nce. Cov txheej txheem sib pauv ntawm cov hydrogen hauv cov tshuaj thiab cov hydrogen ntawm cov electrode hydration txheej kuj tseem koom nrog Na hauv qhov nruab nrab alkaline, ua rau cov electrode muaj peev xwm ntawm pH meter thiab txo qis pH.
