Vim li cas thiaj siv iav cuvettes?
Keeb kwm, reusable quartz cuvettes yuav tsum tau rau kev ntsuas nyob rau hauv lub ultraviolet ntau yam, vim hais tias iav thiab plastics feem ntau nqus ultraviolet lub teeb, tsim kev cuam tshuam. … Cov iav, yas thiab quartz cuvettes yog txhua yam tsim nyog rau kev ntsuas ntawm qhov ntev wavelengths, xws li nyob rau hauv lub teeb pom kev.
Vim li cas iav cuvette tsis haum rau UV?
iav hlwb feem ntau muaj nyob rau hauv tsev kawm ntawv thiab tsev kawm ntawv qib siab undergraduate laboratories vim lawv cov nqi qis. … Txawm li cas los xij, iav absorbs zoo nyob rau hauv cheeb tsam UV thiab nws daim ntawv thov tsis pom zoo rau wavelengths qis dua 340 nm.
Dab tsi yog qhov txawv ntawm quartz Cuvettes thiab iav Cuvettes?
Qhov no yog txoj hauv kev zoo tshaj plaws los txiav txim siab seb cov khoom siv dab tsi uas tsis paub cuvette yog ua los ntawm. Lwm qhov sib txawv ntawm quartz thiab iav cuvettes suav nrog cov hauv qab no:
- Cov khoom sib kis - raws li koj tuaj yeem pom los ntawm cov ntaub ntawv saum toj no quartz muaj qhov sib kis loj dua li iav.
- Thermal Properties - Cov khoom siv quartz muaj cov ntsiab lus melting ntau dua li iav.
- Chemical Compatibility - Cov qauv tshuaj ntawm quartz muaj zog dua li iav ua rau nws muaj peev xwm tswj tau ntau yam tshuaj uas yuav yaj lossis ua puas lub iav cuvette.
- Kev Hloov Kho - Ntawm no yog qhov uas iav cuvettes tiag tiag ci. Lub pyrex cuvette yog qhov yooj yim heev los hloov kho thiab ua txuas rau. Quartz cuvettes tuaj yeem hloov kho tab sis yog txheej txheem loj dua.
Cov yam ntxwv ntawm lub cev ntawm cuvette:
- High mechanical zog, muaj zog yoog raws qhov kub thiab txias, qhov sib txuas muaj zog heev, siab tsis kam mus rau ntau qhov cua kub.
- Cov txheej txheem kho qhov muag pom tseeb heev, kev ua haujlwm kho qhov muag ntawm lub teeb xa hluav taws xob yog qhov zoo heev, thiab kev ua haujlwm yuam kev yog ≤0.3%.
- Siv cov iav zoo quartz thiab iav kho qhov muag kom tsis muaj npuas thiab tsis muaj kab txaij. Lub quartz cuvette yog ntau dua 80% ntawm lub wavelength ntawm 200nm, thiab cov iav cuvette ntau dua 80% ntawm lub wavelength ntawm 340nm.
Tsis ntev los no tau pom tias qhov tsis muaj peev xwm ntsuas tau zoo lossis ua rau muaj qhov yuam kev loj vim yog kev xaiv tsis raug lossis siv cov cuvettes feem ntau tshwm sim hauv kev sim, thiab qhov teeb meem no yooj yim los ntawm tus kws sim. Cov lus piav qhia luv luv ntawm qhov kev xaiv raug ntawm cuvettes yog tam sim no muaj.
- Feem ntau cuvettes muab faib ua quartz thiab iav.
- Tsuas yog 200-400 nm hauv cheeb tsam ultraviolet tuaj yeem siv nrog quartz cuvettes. Lub iav cuvette lossis quartz cuvette tuaj yeem siv rau hauv thaj tsam pom lub teeb ntawm 400-1100 nm.
- tus qauv Q thiab S yog feem ntau quartz, tus qauv G yog feem ntau iav. Yog tias tsis muaj qhov cim lossis qhov cim tsis meej, qhov ntsuas tuaj yeem hloov kho rau thaj tsam ultraviolet ntawm txog 200 nm, thiab xaiv T% hom. Tom qab huab cua zeroed, cov zaub qhia 100% T, thiab cov cuvettes huv si tau muab tso rau hauv cov qauv ntawm tes tuav. (Ob-beam UV tsuas yog siv tau rau hauv cov qauv ntawm tes.) Yog tias qhov sib kis ntawm 60% thiab 90% T, nws yog quartz cuvette. Yog tias qhov sib kis tau qis dua 1%, nws yog iav cuvette.
- Cov cuvettes yuav tsum tau ua ke thiab siv. Kev xa tawm ntawm ob lub cuvettes yog ntsuas los ntawm txoj kev ntawm 3, thiab qhov sib txawv yog tsawg dua 0.5%.
Raws li Suav Laboratory glassware chaw tsim tshuaj paus, WUBOLAB ua raws li koj qhov xav tau ntawm kev yuav khoom iav.
