Osmolality vs Osmolarity
Osmolality thiab osmolarity yog siv los qhia txog cov ntsiab lus ntawm cov kua qaub hauv cov tshuaj. Lub tswv yim tom qab ob lo lus no muaj feem xyuam nrog molarity thiab molality, tab sis lawv muaj lub ntsiab lus sib txawv. Qee zaum molarity, molality thiab osmolality, osmolality tuaj yeem yog qhov zoo sib xws. Piv txwv li, cov tshuaj uas tsis yog-ionic tuaj yeem txiav txim siab. Tab sis nyob rau hauv cov ntaub ntawv ntawm ionic solutes yaj nyob rau hauv ib tug hnyav, lawv muaj ntau yam tseem ceeb. Yuav kom nkag siab txog ob qhov xwm txheej, peb yuav tsum nkag siab tias cov lus no txhais li cas. Ob lo lus no tau siv dav hauv kev siv cov kua dej hauv lub cev thiab tseem nyob hauv biochemistry. Osmometers yog siv los ntsuas cov nqi no.
Osmolality
Osmolality yog ib chav tsev ntawm cov concentration raws li osmoles. Osmoles yog ib qho kev ntsuas ntawm cov kuab tshuaj hauv cov kuab tshuaj. Solutes yuav dissociate rau hauv ob los yog ntau tshaj hais thaum nws yaj. Lub mole yog ib qho kev ntsuas ntawm cov kuab tshuaj, tab sis osmoles yog ib qho kev ntsuas ntawm cov ntsiab lus solute. Lub ntsiab lus ntawm osmolality yog osmoles ntawm cov ntsiab lus nyob rau hauv ib chav tsev loj ntawm cov kuab tshuaj (1 kg). Yog li qhov ntsuas ntawm osmolality yog Osm / kg. Hauv cov chaw kho mob, milliosmoles tau siv dav, yog li chav tsev ntawm osmolality tuaj yeem qhia tau tias yog milliosmoles / kg (mOsm / kg). Piv txwv li, Serum osmolality yog 282 - 295 mOsm / kg dej. Nws yog tib yam li molality qhov twg moles ntawm cov kuab tshuaj yog ntsuas hauv 1 kg ntawm cov kuab tshuaj. Qhov sib txawv ntawm molality thiab osmolality yog kev siv cov moles ntawm solutes piv rau osmoles ntawm solutes feem.
Osmolarity
Osmolarity yog tib yam li osmotic concentration. Qhov no yog qhov ntsuas ntawm cov concentration ntawm cov kua qaub. Chav tsev ntawm osmolarity yog Osm / L. Nws yog txhais raws li tus naj npawb ntawm osmoles ntawm solute hais nyob rau hauv ib liter ntawm kev daws. Nws tuaj yeem muab tau li milliosmoles / litre (mOsm / L). Piv txwv li, plasma thiab lwm yam dej hauv lub cev osmolarity yog 270 - 300 mOsm / L. Molarity yog txhais raws li tus naj npawb ntawm moles ntawm solutes nyob rau hauv ib chav tsev ntim ntawm ib tug tov. Hauv osmalolity, osmoles txhais tau tias, tus naj npawb ntawm cov ntsiab lus. Piv txwv li, hauv 1M sodium chloride tov, muaj 1 moles ntawm sodium chloride hauv 1 L. Tab sis thaum xav txog osmolarity, muaj 2 osmoles. Qhov no yog vim hais tias thaum sodium chloride yog yaj nyob rau hauv ib qho kev daws, sodium thiab chloride hais raug suav tias yog 2 cais cov ntsiab lus, yog li 2 osmoles. Yog li rau cov ionic compounds, cov molarity thiab osmolarity yuav txawv. Tab sis rau cov tsis muaj ionic molecules, txij li thaum lawv tsis dissociate thaum yaj, ib mole ntawm solute sib npaug rau 1 osmole. Hauv kev kuaj kab mob ntawm cov neeg mob, qhov sib txawv ntawm kev suav osmolarity thiab ntsuas osmolarity yog txiav txim siab, thiab qhov no yog hu ua qhov sib txawv osmolar.
Osmolality vs Osmolarity
• Chav tsev ntawm osmolality yog Osm / kg thiab chav tsev ntawm osmolarity yog Osm / L.
• Hauv osmolality, tus naj npawb ntawm cov osmoles nyob rau hauv ib chav tsev loj ntawm cov kuab tshuaj yog xam, tab sis nyob rau hauv osmolarity, tus naj npawb ntawm solute osmoles nyob rau hauv ib chav tsev ntim ntawm hnyav yog xam.
