Qhov sib txawv tseem ceeb ntawm Whatman lim ntawv thiab cov ntawv lim ib txwm yog tias Whatman lim ntawv yog tsim nyog rau kev soj ntsuam zoo thaum cov ntaub ntawv lim dej ib txwm tsim nyog rau ob qho tib si zoo thiab ntsuas ntau.
Kev lim dej yog txheej txheem ntawm kev sib cais cov khoom sib txawv hauv kev sib tov. Peb tuaj yeem siv cov ntawv lim rau qhov sib cais no. Yog li ntawd, peb siv nws los ua ib qho barrier uas yog perpendicular rau cov kua ntws los yog cua ntws. Yog li, cov ntawv lim dej no muaj txiaj ntsig zoo rau kev txheeb xyuas qhov zoo lossis ntau yam. Whatman lim ntawv yog tshwj xeeb rau kev soj ntsuam zoo.
Whatman Filter Paper yog dab tsi?
Whatman lim ntawv yog ib hom ntawv lim uas siv rau kev soj ntsuam zoo. Cov ntaub ntawv lim dej no muaj cov cellulose fibers, thiab cov neeg tsim khoom los ntawm cov paj rwb zoo (Ua ntej, peb yuav tsum kho lawv kom thiaj li nce cov alpha cellulose). Yog li ntawd, Whatman lim ntawv muaj feem pua ntawm alpha cellulose. Qhov no muab nws zoo thiab sib xws. Muaj ntau qib ntawm cov ntawv lim dej no. Peb tuaj yeem faib lawv mus rau qib raws li cov khoom khaws cia, thickness, thiab qhov hnyav. Piv txwv li: Lim ntawv qib 1, 2, 3, thiab lwm yam.
Daim duab 01: Whatman Filter Papers
Ntxiv mus, cov ntawv lim no qhia tau tias muaj zog ntub dej ntau. Yog li ntawd, nws tsis tso cai rau ib qho tseem ceeb impurities nkag mus rau hauv lub filtrate. Peb tuaj yeem siv cov tshuaj ruaj khov kom tau txais lub zog ntub dej no.
Daim ntawv lim ib txwm yog dab tsi?
Cov ntawv lim ib txwm yog ib qho kev thaiv ib nrab uas peb siv los cais cov khoom hauv cov kua dej lossis cov cua ntws. Cov ntaub ntawv no muaj zog ntub dej, porosity, particle retention, volumetric flow rate, compatibility, efficiency thiab muaj peev xwm.
Daim duab 02: Siv Daim Ntawv Lim
Tsis tas li ntawd, muaj ob daim ntawv xws li:
- Cov ntaub ntawv lim dej zoo: peb siv cov ntawv lim dej no hauv kev tshuaj xyuas tshuaj zoo. Cov hmoov tshauv no tuaj yeem tsim tom qab ashing tsis ntau tshaj 0.13%.
- Quantitative filter papers: peb siv cov ntaub ntawv lim dej no hauv kev tshuaj ntsuam xyuas chemical. Tus nqi ntawm cov tshauv tuaj yeem tsim tom qab ashing tsis ntau tshaj 0.0009%. Yog li ntawd, peb tuaj yeem xav tias nws yog daim ntawv lim dej tsis muaj ashless. Yog li peb tuaj yeem tsis quav ntsej txog cov hmoov tshauv uas nws tsim hauv kev tshuaj ntsuam.
Dab tsi yog qhov txawv ntawm Whatman Filter Paper thiab Daim Ntawv Lim Li Cas?
Whatman lim ntawv yog ib hom ntawv lim uas siv rau kev soj ntsuam zoo. Peb tuaj yeem siv nws rau kev tshuaj xyuas zoo. Qhov tseem ceeb tshaj, cov hmoov tshauv ntawm cov ntawv lim no yog li 0.13%. Cov ntawv lim dej ib txwm yog ib qho kev cuam tshuam semi-permeable uas peb siv los cais cov khoom hauv cov kua dej los yog cov cua ntws. Peb tuaj yeem siv lawv rau ob qho tib si zoo thiab ntau yam tshuaj ntsuam xyuas; peb yuav tsum xaiv cov qib zoo ntawm cov ntawv lim raws li lub hom phiaj. Tsis tas li ntawd, cov hmoov tshauv ntawm cov ntaub ntawv lim dej no txawv ntawm 0.0009% (quantitative) txog 0.13% (zoo). Ua raws li infographic nthuav tawm ib sab ntawm kev sib piv ntawm qhov sib txawv ntawm Whatman lim ntawv thiab cov ntawv lim ib txwm.
Summary – Whatman Filter Paper vs Normal Filter Paper
Cov ntaub ntawv lim yog cov teeb meem uas peb siv los cais cov khoom zoo ntawm cov kua lossis cov cua ntws. Muaj ntau qib sib txawv ntawm cov ntawv lim xws li Whatman lim ntawv. Qhov txawv ntawm Whatman lim ntawv thiab cov ntawv lim ib txwm yog tias Whatman lim ntawv yog tsim nyog rau kev soj ntsuam zoo thaum cov ntawv lim ib txwm tsim nyog rau kev soj ntsuam zoo thiab ntau npaum li cas.
