Txoj Kev Sib Cais Sib Xyaws Chromatography
Pendahuluuan
Chromatography yog ib txoj kev siv tau zoo tshaj plaws thiab siv tau ntau yam rau kev cais cov tshuaj sib xyaw, siv rau ntau yam kev tshawb fawb thiab kev lag luam. Lub npe "chromatography" los ntawm cov lus Greek "chroma," txhais tau tias xim, thiab "graphein," txhais tau tias sau. Txawm hais tias cov txheej txheem no tau siv thawj zaug los cais cov tshuaj sib xyaw xim, niaj hnub no chromatography tuaj yeem siv los cais, txheeb xyuas, thiab tshuaj xyuas ntau yam tshuaj, ob qho tib si xim thiab tsis muaj xim.
Cov Ntsiab Cai Tseem Ceeb ntawm Chromatography
Yeej, chromatography muaj ob theem: theem ruaj khov thiab theem txav tau. Theem ruaj khov yog cov khoom siv uas tseem ruaj khov thiab lo rau ntawm ib kem lossis nto, thaum theem txav tau yog cov kua lossis roj uas ntws los ntawm theem ruaj khov. Cov tshuaj hauv cov qauv raug cais raws li qhov sib txawv ntawm lawv cov nqi tsiv teb tsaws chaw ntawm ob theem no.
Txoj Kev Siv Chromatography
1. Daim Ntawv Chromatography
Daim ntawv chromatography yog ib qho ntawm cov txheej txheem yooj yim tshaj plaws. Hauv txoj kev no, ib daim ntawv ua haujlwm ua theem ruaj khov, thiab cov kua (feem ntau yog dej lossis cov organic solvents sib xyaw) ua haujlwm ua theem txav tau. Cov qauv raug muab tso rau sab nraub qaum ntawm daim ntawv, tom qab ntawd daim ntawv raug dipped rau hauv cov kuab tshuaj. Cov kuab tshuaj ntws mus rau ntawm daim ntawv, nqa cov tshuaj ntawm cov sib xyaw nrog nws ntawm cov nqi sib txawv, raws li lawv cov affinities rau cov theem ruaj khov thiab txav tau. Qhov no yog ib qho txheej txheem yooj yim thiab zoo rau kev sib cais cov tshuaj nrog cov polarities sib txawv.
2. Kev Siv Tshuab Chromatography Txheej Nyias (TLC)
TLC yog lwm txoj kev yooj yim thiab ceev. Nws siv lub phaj iav, hlau, lossis yas uas muaj ib txheej nyias ntawm cov khoom nqus xws li silica gel lossis alumina ua theem ruaj khov. Cov qauv raug siv rau ntawm lub hauv paus ntawm lub phaj, tom qab ntawd lub phaj raug muab tso rau hauv lub thawv uas muaj ib txheej nyias ntawm cov kuab tshuaj (theem txav tau). Cov kuab tshuaj nce mus txog lub phaj los ntawm kev ua haujlwm capillary, nqa thiab sib cais cov khoom ntawm cov qauv. Cov txiaj ntsig sib cais tuaj yeem pom tau ncaj qha hauv qab lub teeb UV lossis los ntawm kev cuam tshuam nrog cov tshuaj reagents tshwj xeeb.
3. Kev siv tshuab Chromatography kem
Kev siv cov txheej txheem chromatography hauv kem ntsug yog siv cov txheej txheem ntsug uas muaj cov theem ruaj khov, xws li silica gel lossis alumina. Cov theem txawb, uas tuaj yeem yog cov kua organic lossis cov kuab tshuaj sib xyaw, raug xa mus rau hauv kem uas muaj cov qauv. Cov tshuaj hauv cov qauv raug cais raws li lawv qhov sib raug zoo rau theem ruaj khov thiab kev txav mus los hauv theem txawb. Cov txheej txheem chromatography hauv kem muaj ntau yam sib txawv, xws li cov kua chromatography siab (HPLC) thiab cov kua chromatography ceev ceev.
4. Kev Siv Roj Chromatography (Gas Chromatography - GC)
GC siv los cais thiab tshuaj xyuas cov tshuaj uas tsis muaj zog. Hauv cov txheej txheem no, theem ruaj khov feem ntau yog cov kua uas tau coated rau ntawm cov khoom tsis muaj zog thiab muab tso rau hauv ib lub capillary kem, thaum theem txav tau yog cov roj xws li helium lossis nitrogen. Cov qauv raug txhaj rau hauv kem, qhov twg cov tshuaj vaporize thiab raug nqa los ntawm cov roj inert. Kev sib cais tshwm sim hauv kem raws li qhov sib txawv ntawm volatility thiab kev sib cuam tshuam ntawm cov tshuaj nrog theem ruaj khov. Lub tshuab ntes ntawm qhov kawg ntawm kem ntsuas qhov ntau ntawm txhua cov tshuaj uas tso tawm, tso cai rau ob qho tib si kev tshuaj xyuas ntau thiab zoo.
5. Kev Siv Tshuaj Chromatography Uas Muaj Kev Ua Haujlwm Zoo (HPLC)
HPLC yog ib qho kev hloov kho dua ntawm cov qauv chromatography uas siv lub siab siab los tso cov theem txav mus los ntawm ib kab uas muaj cov khoom me me ua theem ruaj khov. Cov txheej txheem no muab kev daws teeb meem zoo dua thiab tso cai rau kev tshuaj xyuas sai dua thiab ua haujlwm tau zoo dua ntawm ntau yam khoom sib xyaw. Ntau yam khoom siv ntes tau siv tau hauv HPLC, suav nrog UV-Vis, fluorescence, thiab mass spectrometry, tso cai rau ntau yam kev siv hauv kev tshuaj xyuas tshuaj lom neeg, biological, thiab tshuaj.
Cov txiaj ntsig thiab qhov tsis zoo ntawm Chromatography
Ib yam li txhua txoj kev tshawb fawb, chromatography muaj qhov zoo thiab qhov tsis zoo uas yuav tsum tau xav txog.
Kev Zoo Tshaj Plaws:
1. Kev rhiab heev: Chromatography tuaj yeem ntes thiab cais cov tshuaj sib xyaw ua ke hauv cov khoom me me.
2. Kev Siv Tau Ntau Yam: Siv tau rau ntau hom qauv, suav nrog cov roj, cov kua, thiab cov khoom khov.
3. Kev Ceev: Cov txheej txheem siab heev xws li HPLC thiab GC tso cai rau kev tshuaj xyuas sai.
4. Kev Ntsuas Siab thiab Kev Ntsuas Tseeb: Zoo heev rau kev ntsuas kom muaj nuj nqis thiab zoo.
Tsis Muaj:
1. Tus nqi siab: Cov khoom siv chromatography zoo li HPLC thiab GC kim heev thiab xav tau kev saib xyuas tsis tu ncua.
2. Cov Kev Txwv ntawm Cov Tshuaj Sib Xyaws: Qee cov tshuaj sib xyaws yuav tsis haum rau qee cov txheej txheem, piv txwv li, cov tshuaj sib xyaws uas tsis hloov pauv tsis tuaj yeem tshuaj xyuas los ntawm GC.
3. Kev Txawj Ntse: Kev siv cov khoom siv chromatography thiab txhais cov txiaj ntsig xav tau kev txawj ntse siab.
Cov kev siv ntawm Chromatography
Chromatography siv rau ntau yam kev tshawb fawb thiab kev lag luam. Qee qhov kev siv tseem ceeb suav nrog:
1. Kev Tshuaj Xyuas Tshuaj: Txhawm rau cais thiab tshuaj xyuas cov khoom xyaw tshuaj, nrog rau kev sim qhov huv thiab ruaj khov ntawm cov khoom lag luam tshuaj.
2. Kev Tshawb Fawb Txog Khoom Noj: Siv los kuaj seb puas muaj cov tshuaj lom hauv cov khoom noj thiab dej haus, thiab tshuaj xyuas cov khoom noj muaj pes tsawg leeg thiab cov khoom ntxiv rau hauv.
3. Kev Tshawb Fawb Txog Kab Mob: Txhawm rau cais cov protein, nucleic acids, thiab cov metabolites hauv kev tshawb fawb txog biochemical thiab molecular.
4. Kev Tshuaj Xyuas Tshuaj: Siv rau hauv kev tshuaj xyuas ib puag ncig thiab kev tshuaj xyuas kev ua txhaum cai los nrhiav cov pa phem, cov tshuaj lom, thiab cov tshuaj lom neeg txaus ntshai.
5. Kev Lag Luam Petrochemical: Txhawm rau tshuaj xyuas cov khoom siv roj av thiab cov khoom lag luam petrochemical.
Xaus
Chromatography yog ib txoj kev tseem ceeb thiab siv tau ntau yam uas ua lub luag haujlwm tseem ceeb hauv chemistry, biology, thiab ntau yam kev lag luam. Nrog ntau txoj kev muaj, los ntawm cov ntawv yooj yim chromatography mus rau HPLC thiab GC uas muaj zog, nws txuas ntxiv muab cov kev daws teeb meem rau kev sib cais thiab kev tshuaj xyuas cov khoom sib xyaw ua ke. Nws cov txiaj ntsig hauv kev rhiab heev, kev ceev, thiab qhov tseeb ua rau nws yog ib qho cuab yeej tseem ceeb hauv kev tshawb fawb thiab kev siv ua haujlwm. Txawm hais tias tus nqi thiab qhov xav tau kev txawj ntse tuaj yeem ua rau muaj kev cuam tshuam, cov txiaj ntsig los ntawm chromatography ntau dua li nws qhov tseem ceeb hauv kev tshawb fawb thiab kev lag luam.
