A:
Cov dej kub:Cov dej kais dej yog hais txog cov dej uas tau tsim tom qab ntxuav thiab tua kab mob los ntawm cov chaw kho dej kais dej thiab ua tau raws li cov qauv siv rau tib neeg kev ua neej thiab kev tsim khoom. Tus txheej txheem dej hardness yog: lub teb chaws tus qauv 450mg / L.
Softened dej:yog hais txog cov dej uas lub hardness (feem ntau yog calcium thiab magnesium ions nyob rau hauv dej) tau raug tshem tawm los yog txo mus rau ib yam dab tsi. Thaum lub sij hawm tus txheej txheem ntawm softening dej, tsuas yog lub hardness txo, tab sis tag nrho cov ntsev cov ntsiab lus tseem unchanged.
Demineralized dej:yog hais txog cov dej uas cov ntsev (tsuas yog muaj zog electrolytes yaj hauv dej) tau raug tshem tawm lossis txo rau qee yam. Nws conductivity yog feem ntau 1.0 ~ 10.0μS / cm, resistivity (25 ℃) (0.1 ~ 1.0) × 106Ω˙cm, thiab ntsev cov ntsiab lus yog 1 ~ 5mg / L.
Cov dej ntshiab:hais txog dej uas muaj zog electrolytes thiab tsis muaj zog electrolytes (xws li SiO2, CO2, thiab lwm yam) raug tshem tawm los yog txo mus rau ib theem. Nws cov hluav taws xob conductivity yog feem ntau: 1.0 ~ 0.1μS / cm, hluav taws xob conductivity (1.01.0 ~ 10.0) × 106Ω˙cm. Cov ntsiab lus ntsev yog <1mg / L.
Ultrapure dej:hais txog cov dej uas qhov nruab nrab ntawm cov dej hauv cov dej yuav luag tag nrho, thiab tib lub sijhawm, cov pa roj carbon monoxide, colloids thiab organic tshuaj (xws li cov kab mob, thiab lwm yam) kuj raug tshem tawm mus rau theem qis heev. Nws conductivity yog feem ntau 0.1 ~ 0.055μS / cm, resistivity (25 ℃) ﹥10 × 106Ω˙cm, thiab ntsev cov ntsiab lus ﹤ 0.1 mg / L. (theoretical) conductivity ntawm cov dej ntshiab zoo tagnrho yog 0.05μS / cm, thiab resistivity (25 ℃) yog 18.3 × 106Ω˙cm.
Post lub sij hawm: Nov-01-2023
