Video: Puas yog pipette muaj tseeb dua li ntsuas lub tog raj kheej?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kawm tiav cylinders feem ntau yog muaj tseeb dua thiab meej dua chav ntsuas dej thiab cov beakers, tab sis lawv yuav tsum tsis txhob siv los ua qhov ntsuas volumetric; volumetric glassware, xws li lub khob ntim ntim lossis ntim ntim pib , yuav tsum tau siv, raws li nws yog txawm muaj tseeb dua thiab meej.
Kuj tseem paub yog, vim li cas lub pipette yog qhov tseeb dua li ntsuas lub tog raj kheej?
Lawv tsis raug vim qhov loj meniscus. Kawm tiav lub tog raj kheej : A kawm tiav lub tog raj kheej yog qhov ceev thiab yooj yim (txawm tias tsawg raug ) txoj kev ntsuas qhov ntim ntawm cov kua. Volumetric pipets yog li ntawd raug vim lub caj dab ntev txo qhov yuam kev hauv ntsuas ntim ntawm meniscus.
Qhov thib ob, lub ntsuas ntim twg yog qhov tseeb tshaj plaws? Volumetric Glassware Kawm tiav cylinders, beakers, volumetric pipets, burets thiab volumetric flasks yog tsib hom iav feem ntau siv los ua ntsuas tawm tshwj xeeb ntim . Volumetric pipets, flasks thiab burets yog cov qhov tseeb tshaj plaws ; cov glassware makers calibrate cov no mus rau theem siab qhov tseeb.
Qhov thib ob, dab tsi yog qhov tseeb dua li lub pipette?
Burettes loj dua tshaj ib tug pipette , nws muaj lub stopcock nyob rau hauv qab los tswj kev tso kua. Tab sis, nws muaj meniscus loj thiab yog li nws qhov tseeb thiab precision yog tsawg dua hauv kev ntsuas cov kua. Pipettes me me tshaj burette, nws muaj lub dropper zoo li lub kaw lus uas tso tawm cov kua hauv qhov xav tau los ntawm kev txo lub tshuab nqus tsev.
Dab tsi yog qhov tseeb ntawm lub tog raj kheej ntsuas?
Cov qhov tseeb specification ntawm kawm tiav cylinders yog coj los ua ib feem pua ntawm tag nrho cov nplai, uas yog, ntim ntawm cov kab sau saum toj kawg nkaus. Rau chav kawm B kawm tiav cylinders , cov hais qhov tseeb ntawm 1% txhais tau tias 100ml lub tog raj kheej thaum sau kom raug yuav raug 100 ± 1ml.
Pom zoo:
Yuav ua li cas ntsuas lub cheeb ntawm lub tog raj kheej siv lub vernier caliper?
Txhawm rau nrhiav qhov ntev ntawm lub tog raj kheej / Khoom: Tuav lub tog raj kheej los ntawm nws qhov kawg siv lub puab tsaig qis ntawm vernier caliper. Nco ntsoov nyeem ntawm lub ntsiab ntsuas uas nyob rau sab laug ntawm vernier scale xoom cim. Tam sim no saib rau lub cim ntawm vernier nplai uas kab nrog lub cim ntawm lub ntsiab teev
Qhov twg yog qhov tseeb dua qhov hloov pauv pipette lossis ntsuas pipette?
Kawm tiav pipettes yog tsawg dua li volumetric pipettes. Mohr kawm tiav pipettes, uas yog qee zaum hu ua "drain out pipettes", tau cim nrog xoom thaum pib ntawm lawv qhov kawg conical, thaum Serological kawm tiav pipettes, tseem hu ua "tsov tawm pipettes", tsis txhob tso cov cim xoom
Lub khob hliav qab puas yog lub tog raj kheej?
Lub khob hliav qab yog ib qho khoom siv 3-dimensional uas muaj lub hauv paus ncig thiab ib qho vertex. Lub tog raj kheej: Lub tog raj kheej yog 3-dimensional khoom khoom uas muaj ob qho tib si puag ncig puag ncig txuas nrog lub ntsej muag nkhaus
Qhov ntsuas ntawm ib lub tog raj kheej kawm tiav yog dab tsi?
Qhov kawm tiav lub tog raj kheej nplai yog qhov ntsuas ntsuas, thiab nws tau nyeem zoo li tus kav. Qhov ntsuas tau nyeem rau ib tus lej dhau qhov kev faib me me los ntawm kev kwv yees (interpolating) ntawm cov kev faib tawm no. Nrog rau 50-mL kawm tiav lub tog raj kheej, nyeem thiab sau cov ntim rau qhov ze tshaj 0.1 mL
Vim li cas lub tog raj kheej kawm tiav yog qhov tseeb dua?
Cov cylinders kawm tiav yog tsim los rau kev ntsuas qhov tseeb ntawm cov kua nrog qhov yuam kev me me dua li beakers. Lawv yog nyias dua li lub beaker, muaj ntau ntau cov qhab nia kawm tiav, thiab tsim kom muaj nyob rau hauv 0.5-1% yuam kev. Yog li ntawd, qhov tseeb ntawm tus txheeb ze ntawm lub beaker yog ib qho tseem ceeb rau yuav luag txhua chav kuaj