YPhotometry vs Spectrophotometry
Photometry thiab spectrophotometric yog ob qho tseem ceeb ntawm kev ntsuas lub teeb. Ob txoj kev no muaj ntau yam kev siv hauv thaj chaw xws li chemistry, physics, optics thiab astronomy. Nws yog ib qho tseem ceeb kom muaj kev nkag siab zoo hauv cov ntsiab lus no kom ua tau zoo hauv cov haujlwm no. Kab lus no nthuav tawm cov ntsiab lus, kev siv, piv txwv, qhov sib xws thiab thaum kawg qhov sib txawv ntawm photometry thiab spectrophotometric.
Spectrophotometric yog dab tsi?
Txhawm rau nkag siab spectrophotometric, ib tus yuav tsum xub nkag siab lub tswv yim ntawm spectrum, tshwj xeeb tshaj yog cov spectrum haum. Lub teeb yog ib hom ntawm electromagnetic waves. Muaj lwm hom EM nthwv dej xws li X-Rays, Microwaves, Xov tooj cua nthwv dej, Infrared thiab Ultraviolet rays. Lub zog ntawm cov nthwv dej no yog nyob ntawm lub wavelength lossis qhov zaus ntawm nthwv dej. Cov nthwv dej ntau zaus muaj ntau lub zog, thiab cov nthwv dej tsis tshua muaj zog tsawg. Lub teeb nthwv dej yog tsim los ntawm cov pob ntawv me me ntawm cov nthwv dej lossis lub zog hu ua photons. Rau ib tug monochromatic rays, lub zog ntawm ib tug photon yog tsau. Lub electromagnetic spectrum yog cov zajlus ntawm kev siv zog piv rau zaus ntawm cov photons. Thaum ib lub teeb ntawm cov nthwv dej uas muaj tag nrho cov wavelengths dhau los ntawm cov kua lossis roj, cov ntawv cog lus lossis cov khoom siv hluav taws xob hauv cov ntaub ntawv no nqus tau qee cov photons los ntawm lub teeb. Nws yog vim lub quantum mechanical effect uas tsuas yog photons nrog qee lub zog tau nqus. Qhov no tuaj yeem nkag siab los ntawm kev siv lub zog ntawm cov duab kos duab ntawm atoms thiab molecules. Spectrophotometry yog qhov ntsuas ntau ntawm qhov kev xav lossis kev sib kis ntawm cov khoom siv raws li kev ua haujlwm ntawm wavelength. Rau thaj tsam pom, lub teeb dawb zoo meej muaj tag nrho cov wavelengths hauv cheeb tsam. Xav tias lub teeb dawb yog xa los ntawm kev daws teeb meem nqus cov photons nrog lub wavelength ntawm 570 nm. Qhov no txhais tau tias liab photons ntawm lub spectrum yog tam sim no txo. Qhov no yuav ua rau muaj qhov khoob lossis txo qis ntawm 570 nm cim ntawm cov phiaj xwm kev siv zog piv rau lub wavelength. Qhov kev siv ntawm lub teeb dhau los ua ib feem ntawm lub teeb pom kev tuaj yeem npaj rau qee qhov kev paub ntau ntxiv, thiab qhov tshwm sim los ntawm cov qauv tsis paub siv tau los txiav txim siab qhov concentration ntawm cov tshuaj.
Photometry yog dab tsi?
Lo lus "duab" txhais tau tias lub teeb thiab lo lus "metry" yog hais txog kev ntsuas. Photometry yog kev tshawb fawb ntawm kev ntsuas lub teeb, hais txog nws qhov pom kev ci ntsa iab rau tib neeg lub qhov muag. Hauv photometry, tus qauv yog tib neeg qhov muag. Lub rhiab heev ntawm tib neeg lub qhov muag rau cov xim sib txawv yog txawv. Qhov no yuav tsum tau txiav txim siab hauv photometry. Yog li ntawd, txoj kev amplification yog siv kom cov nyhuv ntawm txhua xim yuav zoo ib yam li qhov muag. Txij li thaum tib neeg lub qhov muag tsuas yog rhiab rau pom lub teeb, photometry tsuas yog poob rau hauv qhov ntau.
Dab tsi yog qhov txawv ntawm photometry thiab spectrophotometric?
• Spectrophotometry yog siv rau tag nrho cov electromagnetic spectrum, tab sis photometry tsuas yog siv tau rau lub teeb pom kev.
• Photometry ntsuas tag nrho cov ci ntsa iab raws li pom los ntawm tib neeg lub qhov muag, tab sis spectrophotometric ntsuas qhov kev siv ntawm txhua lub wavelength ntawm tag nrho cov kab hluav taws xob electromagnetic uas qhov ntsuas tsim nyog.
