Kev tshuaj xyuas txoj kev tu cov impurities thiab av ntawm pH meter thiab electrode
Vim hais tias cov concentration ntawm qhov nruab nrab ntsuas los ntawm pH meter electrode thiab cov pa paug impurities sib txawv, nws yuav tsum tau muab ntxuav rau kev siv tom ntej. Yuav kom tswj tau qhov ntsuas qhov tseeb ntawm cov electrode thiab cov haujlwm ntawm cov electrode, cov kev soj ntsuam hauv qab no yog ua los ntawm cov impurities sib txawv uas txuas rau saum npoo ntawm cov electrode membrane. . PH electrode tu impurities feem ntau suav nrog cov kev tu hauv qab no
1. Cov av dav dav: 3% ~ 5% hydrochloric acid, ntxuav nrog dej siab (<>
2. Roj los yog roj: isopropyl ethanol (wear-resistant ethanol), methanol, lwm yam kev daws teeb meem uas tuaj yeem tshem tawm cov roj tshwj xeeb;
3. PH electrode ua hauj lwm nyob rau hauv alkaline tej yam kev mob: W=5 feem pua ~ 10 feem pua hydrochloric acid tov, W=3 feem pua ~ 7 feem pua sulfuric acid; sib tov ntawm concentrated hydrochloric acid thiab phosphoric acid;
4. PH electrode working under acidic conditions: W=5%~10% hot alkaline solution (>56 degree); W=5 feem pua ~ 10 feem pua hydrochloric acid; W=2 feem pua ~ 3 feem pua hydrofluoric acid;
5. Sulfate thiab carbonate: W=5 feem pua ~ 10 feem pua hydrochloric acid; sib tov ntawm concentrated hydrochloric acid thiab phosphoric acid; sib tov ntawm sodium sulfite thiab sodium hydrosulfite;
6. Silicon dioxide los yog nplaum nplaum: W=2 feem pua ~ feem pua hydrofluoric acid;
Vim tias pH meter electrodes yog qhov muag heev, tshem tawm cov av uas lo rau pH meter electrodes yuav tsum ua siab ntev thiab siv cov khoom siv kev nyab xeeb kom zoo thaum ntxuav. Xaiv cov tshuaj ntxuav kom zoo tuaj yeem ua rau txoj haujlwm no yooj yim me ntsis. Thaum ntxuav, muab tso rau hauv cov electrode hauv cov tshuaj ntxuav kom tsawg li 5 feeb, kom lub tshuab ntxuav tuaj yeem nkag mus rau hauv cov av. Ntxuav cov electrodes ob zaug yog ib qho kev daws teeb meem zoo. Ua ntej muab cov electrode nyob rau hauv cov kua qaub los yog alkali tov rau soak, thaum lub sij hawm soaking, siv ib tug mos txhuam hniav los txhuam cov electrode ntawm electrode kom tshem tawm cov av. Tom qab ntawd xaiv cov kuab tshuaj los ntxuav. Thaum kawg, lub sensor yuav tsum tau muab yaug thiab tsau nrog dej los yog saline tov (KCl). Khaws nws cov rhiab heev rhiab heev thiab ntev lub neej kev pab cuam ntawm lub electrode.
