Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi

Cov txheej txheem:

Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi
Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi

Video: Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi

Video: Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi
Video: Difference between Rayleigh scattering and Raman scattering 2024, Kaum ib hlis
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Qhov sib txawv tseem ceeb ntawm spectrophotometer thiab spectrofluorometer yog qhov spectrophotometer suav nrog kev ntsuas kev nqus, qhov spectrofluorometer cuam tshuam txog kev hloov pauv ntawm polyatomic fluorescent molecules los ntawm lawv qib siab zog mus rau hauv av los ntawm kev txo lawv lub zog los ntawm kev tawm ntawm photons.

A spectrophotometer yog ib qho kev ntsuas ntsuas uas tuaj yeem ntsuas qhov concentration ntawm cov qauv los ntawm kev ntsuas lub teeb nqus. Spectrofluorometer yog ib qho kev ntsuas ntsuas uas siv cov khoom fluorescent ntawm qee cov tshuaj kom tau txais cov ntaub ntawv hais txog cov concentration thiab cov tshuaj lom neeg ntawm cov qauv.

Dab tsi yog Spectrophotometer?

A spectrophotometer yog ib qho kev ntsuas ntsuas uas tuaj yeem ntsuas qhov concentration ntawm cov qauv los ntawm kev ntsuas lub teeb nqus. Nws siv qhov kev xav lossis kev sib kis ntawm cov khoom siv raws li kev ua haujlwm ntawm wavelength. Cov cuab yeej no tuaj yeem ua haujlwm ntawm lub teeb pom kev, nyob ze UV, thiab ze IR teeb, thiab. Peb siv lub cuvette los tso cov qauv hauv qhov ntsuas. Tom qab ntawd ib lub teeb ci dhau los ntawm cov qauv thiab txav mus rau hauv ib qho spectrum ntawm wavelengths. Tom qab ntawd lub ntsuas ntsuas qhov kev siv zog ntawm cov khoom siv sib txuas. Thaum kawg, peb tau txais cov txiaj ntsig ntawm kev tshuaj ntsuam ntawm cov khoom siv tom qab dhau lub ntsuas ntsuas.

Spectrophotometer thiab Spectrofluorometer - Sib piv ib sab
Spectrophotometer thiab Spectrofluorometer - Sib piv ib sab

Daim duab 01: Spectrophotometer

Peb tuaj yeem siv qhov ntsuas no txhawm rau txheeb xyuas cov organic tebchaw thiab. Qhov ntawd yog los ntawm kev txiav txim siab qhov nqus qhov siab tshaj plaws. Ntxiv mus, peb tuaj yeem siv nws los txiav txim cov xim hauv ib qho spectral ntau. Qhov tseem ceeb tshaj plaws, peb siv nws los ntsuas qhov concentration ntawm cov khoom hauv ib qho piv txwv los ntawm kev txiav txim siab lub teeb absorbed los ntawm cov khoom ntawd.

Spectrofluorometer yog dab tsi?

Spectrofluorometer yog ib qho kev ntsuas ntsuas uas siv cov khoom fluorescent ntawm qee cov tshuaj kom tau txais cov ntaub ntawv hais txog cov concentration thiab cov tshuaj lom neeg ntawm cov qauv. Hauv qhov ntsuas no, peb yuav tsum xaiv qee qhov excitation wavelength. Peb tuaj yeem soj ntsuam qhov emission ntawm ib lub wavelength, los yog peb tuaj yeem luam theej tus qauv txhawm rau sau qhov kev siv zog tiv thaiv lub wavelength. Qhov no tseem hu ua emission spectrum. Peb tuaj yeem siv qhov ntsuas no hauv fluorescence spectroscopy.

Feem ntau, cov cuab yeej no siv lub teeb pom kev zoo rau kev foob pob ntawm cov qauv nrog ntau cov photons. Yog li ntawd, nws tso cai rau ntau tus lej ntawm cov molecules kom tau txais lub xeev zoo siab ntawm ib qho chaw ntawm lub sijhawm. Nyob rau hauv cov txheej txheem no, lub teeb yuav dhau los ntawm lub lim ntawm ib qho kev xaiv ruaj wavelength. Los yog lwm yam, lub teeb tuaj yeem dhau los ntawm monochromator uas tuaj yeem tso cai rau lub wavelength xaiv, tso cai rau nws siv lub teeb zoo siab. Hauv qhov ntsuas no, cov emission tau sau nyob rau hauv ib qho kev taw qhia uas yog perpendicular mus rau lub teeb emitted. Ntxiv mus, cov emissions yuav kis tau los ntawm lub lim los yog ib tug monochromator ua ntej nws yuav raug kuaj los ntawm ib tug photomultiplier raj, photodiode, los yog them-coupled ntaus ntawv detector. Tsis tas li ntawd, lub teeb liab tau muab los ua ib qho kev tso tawm digital lossis ua qhov tso tawm analog.

Spectrophotometer vs Spectrofluorometer hauv Daim Ntawv Tabular
Spectrophotometer vs Spectrofluorometer hauv Daim Ntawv Tabular

Daim duab 02: Spectrofluorometer

Muaj ntau lwm yam kev xaiv muaj nyob rau hauv qhov ntsuas no: polarizers, cryostats, txias ntiv tes dewars, LEDs rau lub neej, lim tuav, phau ntawv hlais, lim lub log, lub computer tswj cov slits, integrating spheres, thiab lwm yam.

Qhov txawv ntawm Spectrophotometer thiab Spectrofluorometer yog dab tsi?

Spectrophotometer thiab spectrofluorometer yog cov cuab yeej tshuaj ntsuam xyuas tseem ceeb. Qhov sib txawv tseem ceeb ntawm spectrophotometer thiab spectrofluorometer yog tias spectrophotometer cuam tshuam nrog kev ntsuas kev nqus thaum spectrofluorometer cuam tshuam txog kev hloov pauv ntawm polyatomic fluorescent molecules los ntawm lawv qib siab zog mus rau hauv av los ntawm kev txo lawv lub zog theem los ntawm emission ntawm photons.

Cov hauv qab no qhia txog qhov sib txawv ntawm spectrophotometer thiab spectrofluorometer hauv daim ntawv teev npe rau ib sab ntawm kev sib piv.

Summary – Spectrophotometer vs Spectrofluorometer

Spectrophotometer thiab spectrofluorometer yog cov cuab yeej tshuaj ntsuam xyuas tseem ceeb. Qhov sib txawv tseem ceeb ntawm spectrophotometer thiab spectrofluorometer yog tias spectrophotometer cuam tshuam nrog kev ntsuas ntawm kev nqus, qhov spectrofluorometer cuam tshuam nrog kev hloov pauv ntawm polyatomic fluorescent molecules los ntawm lawv qib siab zog mus rau hauv av los ntawm kev txo lawv lub zog los ntawm kev tawm ntawm photons.

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