Dab tsi yog qhov loj spectrum hauv chemistry?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

A loj spectrum yog qhov kev siv zog vs. m/z ( pawg -to-charge ratio) zaj sawv cev a tshuaj tsom xam. Li no, lub loj spectrum ntawm ib qho qauv yog tus qauv sawv cev rau kev faib cov ions los ntawm pawg (ntau yog: pawg -to-charge ratio) hauv ib qho piv txwv.

Hauv qhov no, dab tsi yog qhov loj spectrometry hauv chemistry?

Loj spectrometry (MS) yog cov txheej txheem analytical uas ntsuas cov pawg - rau-them nqi ntawm ions. Cov spectra no yog siv los txiav txim seb lub ntsiab lus lossis isotopic kos npe ntawm tus qauv, qhov loj ntawm cov khoom thiab ntawm cov molecules, thiab qhia qhov tseeb tshuaj tus kheej lossis cov qauv ntawm cov molecules thiab lwm yam tshuaj tshuaj sib xyaw.

Tom qab ntawd, lo lus nug yog, dab tsi yog qhov peaks nyob rau hauv ib pawg loj? A loj spectrum feem ntau yuav raug nthuav tawm raws li daim duab ntsug bar, uas txhua lub bar sawv cev rau ib qho ion muaj qhov tshwj xeeb pawg -rau-them piv (m / z) thiab qhov ntev ntawm qhov bar qhia txog qhov sib npaug ntawm cov ion. Cov ion khaus tshaj plaws yog muab ntau ntawm 100, thiab nws raug xa mus rau lub hauv paus. ncov.

Ua kom pom qhov no, qhov loj spectrum ua haujlwm li cas?

A loj spectrometer tsim cov khoom siv hluav taws xob (ions) los ntawm cov khoom siv tshuaj uas yuav tsum tau soj ntsuam. Cov loj spectrometer ces siv hluav taws xob thiab magnetic teb los ntsuas qhov pawg ("qhov hnyav") ntawm cov nqi them.

Dab tsi yog qhov kev thov ntawm huab hwm coj spectrometry?

Loj spectrometry sawv cev rau cov txheej txheem muaj zog nrog ntau yam sib txawv daim ntawv thov hauv biology, chemistry, thiab physics, tab sis kuj nyob rau hauv cov tshuaj kho mob thiab txawm qhov chaw tshawb nrhiav. Nws yog siv los txiav txim siab qhov hnyav molecular ntawm cov tebchaw los ntawm kev sib cais molecular ions raws li lawv pawg thiab them nqi.