Ntev npaum li cas yuav tsum ntsuas pH ntsuas ntsuas yog tias lawv tsis ruaj khov?
Kev nyeem ntawv pH tsis raug, pes tsawg lub ntsuas acidity yuav tsum tau ntsuas? Qhov laj thawj rau kev nyeem ntawv tsis raug tuaj yeem pom los ntawm ob yam: cov txheej txheem ua haujlwm ntawm pH electrode thiab cov txheej txheem tu. 1. Kev soj ntsuam ntxaws ntxaws ntawm pH meter electrode 1. Seb nws puas yog calibrated zoo ua ntej ntsuas; Yog tias qhov ntsuas tsis zoo ib zaug, koj tuaj yeem rov ua qhov ntsuas, xa mus rau 3-point calibration hauv phau ntawv ntsuas ntawm Ziman. "Yuav ua li cas kuv yuav tsum ua qhov thib peb point calibration ntawm pH meter?" Yog tias nws tsis tuaj yeem calibrate, xav txog kev hloov cov electrode. 2. Lub qhov muag hluav taws xob muaj kuab paug thiab yuav tsum tau ntxuav kom tsim nyog: yog tias cov tshuaj ntsuas muaj cov tshuaj uas yooj yim rau cov kab mob rhiab heev los yog thaiv cov kua hlws ris kom passivate cov electrode, txoj kab nqes yuav txo qis thiab cov ntawv nyeem yuav tsis raug. Yog tias qhov tshwm sim no tshwm sim, nws yuav tsum tau muab ntxuav nrog cov tshuaj tsim nyog raws li qhov xwm txheej ntawm cov pa phem kom rov qab kho cov electrode. Txhawm rau ntxuav cov kauj ruam, thov mus saib hauv lub vev xaib raug cai saum toj no. 3. Ua ntej immersing lub electrode nyob rau hauv txhua qhov kev daws yuav tsum tau kuaj, nws yuav tsum tau ntxuav nrog dej distilled, thiab cov kua nplaum yuav tsum tau ua tib zoo nqus nrog cov ntaub ntawv absorbent kom tsis txhob muaj kab mob thiab dilution ntawm cov tshuaj ntsuam xyuas, ua rau qhov ntsuas tsis raug thiab tsom xam. 2. Kev soj ntsuam yooj yim 1. Kev sojntsuam ntawm pH meter yog qias neeg thiab yuav tsum tau ntxuav. 2. Cov hlau tsis huv. 3. Lub ntsuas pH yog kev laus. 4. Cov kua ntsuas tau hloov pauv tau zoo heev. Qhov laj thawj tseem ceeb yog vim li cas cov ions hauv cov tshuaj muaj tsawg heev, uas ua rau kev nyeem ntawv tsis ruaj khov. Tsis tau ntxuav, muaj cov residual reagents 2. Muaj cov tshuaj tiv thaiv hauv cov tshuaj. 3. Cov tshuaj tsis tshee. 4. Lub ntsuas ntsuas acidity npaum li cas? Ntawm no kom paub qhov txawv seb koj puas siv lub tshuab ua haujlwm lossis chaw kuaj pH meter. 1. Hauv kev siv hauv kev lag luam, yog tias qhov ntsuas nruab nrab yog ntsuas txhua lub sijhawm, tsis tas yuav ntsuas nws. Yog tias nws raug tshem tawm ntawm lub pob qub, nws yuav tsum tau muab rov qab los yog ntsuas thaum nws muab rov qab rau hauv. 2. Lub chaw soj nstuam siv lub ntsuas pH, uas yuav tsum tau ua kom raug ntau dua. Tau kawg, txhua qhov kev sim koj ua yog sib txawv, yog li koj yuav tsum rov ntsuas nws ua ntej txhua qhov kev siv.
