Tsis muaj kev siv thoob ntiaj teb kev hloov pauv hloov pauv hloov pauv hloov pauv ntawm kev coj ua (EC) thiab pH, vim hais tias kev coj ua qhia txog tag nrho cov kev coj ua ntawm tag nrho cov ions raug them hauv cov tshuaj, thaum pH tsuas yog qhia txog kev ua haujlwm ntawm hydrogen ions (H⁺). Qhov kev sib raug zoo ntawm ob yog nyob ntawm qhov muaj pes tsawg leeg ntawm cov tshuaj (xws li, hom acid / puag, ionic zog, kub, thiab lwm yam).
Txawm li cas los xij, hauv cov xwm txheej tshwj xeeb, kev hloov pauv tuaj yeem ua tau los ntawm theoretical derivation lossis empirical qauv. Cov xwm txheej zoo sib xws thiab cov qauv tsim muaj raws li hauv qab no:
1. Dej Ntshiab/Ultrapure Dej (xws li, siab- dej ntshiab huv los ntawm cov chaw tsim hluav taws xob) Scenario
Hauv qhov xwm txheej tshwj xeeb ntawm cov dej ntshiab (CO₂≈0) nrog ammonia ntxiv los kho cov pH, muaj kev sib raug zoo ntawm kev ua lej thiab pH (los ntawm ammonia ionization equilibrium thiab limiting molar conductivity ntawm ions):
pH rau Conductivity (κ) Kev hloov pauv: pH=8.566 + lg(κ) (Ceeb Toom: κ yog conductivity, unit μS / cm, muaj feem xyuam rau pH 7.5 ~ 10.5, thiab κ yog loj dua cov cation conductivity).
Conductivity (κ) rau pH Conversion: κ=10^(pH - 8.566) (Unit: μS/cm).
2. Strong Acid/Strong Base Solutions (Theoretical Estimation) Scenario
Nyob rau hauv cov xwm txheej zoo tshaj plaws uas muaj zog acids (piv txwv li, H₂SO₄) lossis cov hauv paus muaj zog (piv txwv li, NaOH) tau sib cais tag nrho thiab kev ua haujlwm coefficients raug ignored, conductivity yuav kwv yees los ntawm ion concentration thiab limiting molar conductivity, thiab ces pH yuav inferred. Txawm li cas los xij, tsis muaj ib qho qauv yooj yim; kev xam yuav tsum tau ua nyias raws li ion contributions (piv txwv li, κ=Σ(λ_i × c_i) × 10^3, ces ua ke nrog pH=-lg[H⁺] rau inference).
3. General Water Quality/Empirical Estimation Scenario
Tsis muaj kev hloov pauv ncaj qha: Rau cov qauv dej tiag tiag nrog cov sib xyaw ua ke (xws li dej ntuj, dej khib nyiab), vim muaj ntau yam tsis paub ions, conductivity tsis tuaj yeem hloov pauv ncaj qha los ntawm pH; cais ntsuas ntsuas yog tsim nyog.
Cov kev ceev faj:
Cov qauv saum toj no txhua tus muaj cov xwm txheej nruj (xws li qhov kub thiab txias tshwj xeeb ionic muaj pes tsawg leeg). Hauv cov ntawv thov engineering tiag tiag, lawv yuav tsum tau txheeb xyuas nrog rau cov khoom siv tshuaj lom neeg ntawm cov nruab nrab tshwj xeeb lossis hloov dua siab tshiab siv cov cuab yeej tsim ua - hauv kev mob siab rau algorithm.