Cov kws tshaj lij pab koj daws teeb meem me me nrog pH meter electrodes
1. Cov khoom siv ntawm electrodes yog dab tsi? pH electrode plhaub feem ntau siv PC yas (polycarbonate) plhaub thiab iav plhaub. PC plhaub tiv taus kev sib tsoo thiab kev cuam tshuam, tab sis qhov ntsuas kub siv tau<80oC. And it is susceptible to corrosion in high alkaline solutions and some media. The glass shell is suitable for temperatures of 0-150oC and is generally not corroded except by hydrofluoric acid solutions, but is easily damaged by collisions. Stainless steel, PTFE, metal, etc.
2. Dab tsi yog qhov sib txawv ntawm cov khoom sib txawv ntawm electrodes? PC yas, polycarbonate, PC plhaub yog resistant rau kev sib tsoo thiab kev cuam tshuam, tab sis qhov siv tau kub<80oC. Polytetrafluoroethylene electrode is corrosion-resistant and is commonly known as the king of plastics, except for some organic solvents. Glass electrodes can withstand high temperatures, resist corrosion (except hydrofluoric acid), and are easily broken. If the medium contains HF and is non-corrosive and has a temperature of 0-100 degrees Celsius, you can use stainless steel electrodes; if the medium contains organic solvents, you can use polytetrafluoroethylene electrodes, which can withstand high temperatures, around 280 degrees Celsius; PH electrodes have the highest The temperature can reach 130 degrees Celsius. If the temperature is higher than 130 degrees Celsius, it is recommended to use imported electrodes.
3. Dab tsi yog qhov lifespan ntawm cov electrode nyob rau hauv ib txwm siv?
Feem ntau, electrodes yog siv rau ib nrab xyoo mus rau ib xyoos. Qhov no nyob ntawm kev ua haujlwm, thiab qee qhov siv rau ib thiab ib nrab rau ob xyoos. Cov khoom lag luam tuaj yeem siv sijhawm 3-5 xyoo, tab sis lawv kim heev!
4. Yuav tiv thaiv electrode li cas? (1) Cov iav zaj duab xis nyob rau hauv qis kawg ntawm iav electrode yog yooj yim tawg, yog li tsis txhob sib cuag nrog cov khoom tawv. (2) Thaum siv thawj zaug, lub khob iav kheej kheej yuav tsum tau tsau rau hauv dej distilled hnub thiab hmo ntuj. Nws tseem yuav tsum tau soaked hauv dej distilled thaum tsis siv, kom cov txheej txheem soaking tau yooj yim dua lwm zaus nws siv. (3) Thaum ntsuas cov tshuaj alkaline muaj zog, ua haujlwm kom sai li sai tau thiab ntxuav nrog dej tam sim ntawd tom qab ntsuas los tiv thaiv cov alkali los ntawm corroding iav zaj duab xis. (4) Cov iav zaj duab xis yuav tsum tsis txhob stained nrog roj. Yog tias qhov no tshwm sim, ua ntej tso rau hauv cov khoom siv distiller, tom qab ntawd muab tso rau hauv ether lossis carbon tetrachloride. Ces txav mus rau cawv. Thaum kawg, yaug nws nrog dej thiab muab tso rau hauv dej. (5) Organic iav raj ntawm lub tshuab hluav taws xob electrode muaj cov khoom siv hluav taws xob zoo heev thiab yuav tsum tsis txhob cuam tshuam nrog cov tshuaj lossis roj.
5. Kuv yuav ua li cas yog tias kuv tsis siv lub tshuab electrode ntev? Cia thiab ntxuav ntawm acidimeter (ph meter) iav electrode: luv luv: khaws cia hauv cov tshuaj tsis muaj pH =4; mus sij hawm ntev: khaws cia rau hauv cov tshuaj tsis haum nrog pH=7. Kev kis kab mob ntawm cov iav electrode teeb yuav ua rau lub sij hawm teb electrode ntev. So cov av nrog CCl4 los yog xab npum, ces tsau rau hauv dej distilled rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv. Thaum cov pa phem hnyav, nws tuaj yeem tsau rau hauv 5% HF tov rau 10 rau 20 feeb, yaug nrog dej tam sim ntawd, thiab muab tso rau hauv 0.1NHCl tov rau ib hnub thiab hmo ntuj ua ntej siv txuas ntxiv.
6. Dab tsi yog qhov txawv ntawm qhov kev pab cuam lub neej thiab tus nqi ntawm cov khoom siv hluav taws xob hauv tsev thiab cov khoom siv hluav taws xob txawv teb chaws? Lub neej kev pab cuam ntawm domestic electrodes tsis ntev npaum li cov khoom siv electrodes. Raws li ib txwm muaj, nws tuaj yeem siv tau li ntawm 2-3 xyoo, thaum lub tshuab hluav taws xob hauv tsev tuaj yeem siv tau rau 1-1 thiab ib nrab xyoo nyob rau hauv ib txwm muaj, tshwj tsis yog nyob rau hauv cov xwm txheej tshwj xeeb. Tab sis tus nqi ntawm domestic electrodes yog pheej yig dua li imported electrodes.
7. Dab tsi yog cov yam ntxwv thiab kev ua haujlwm ntawm tus kheej tu electrodes?
Nruab ib lub tshuab ultrasonic ze ntawm pH meter sojntsuam, uas emits ultrasonic tsis los ntxuav lub pH electrode. Qhov kev siv ntawm ultrasonic yoj yog ua tiav los ntawm kev kho cov zaus oscillation ntawm ultrasonic yoj. Nws yog ntsia nyob rau hauv ib tug longitudinal yam, uas yog, lub ultrasonic sojntsuam yog ntsia hauv qab ntawm lub electrode. Peb siv kev sib xyaw ua ke ntawm kev ntxuav ultrasonic thiab tshuaj ntxuav dav hlau kom tau txais kev ntxuav pH meter electrodes.
