Cov peev xwm ntawm kem muaj xws li 1, 3, 6, thiab 10 ml qhov ntau thiab tsawg, thiab lwm yam.
Peb cov txheej txheem tsim khoom txo qhov sib txawv thiab txhim kho cov txheej txheem rov qab thiab kev ntxuav
1.C18 Octadecyl uas muaj qhov kawg
2.C18 Octadecy Tsis Muaj Qhov Kawg
3.C8 Octyl
4.CN Cyanopropyl
5. PSA Thawj-Thib Ob Amine
6.NH2 Aminopropyl
7.SAX Muaj zog Anion pauv
8. SCX Kev Sib Pauv Cation Muaj Zog
Cov kem rho tawm cov khoom siv silica (SPE) yog cov cuab yeej tseem ceeb hauv kev tshuaj xyuas tshuaj, siv rau kev ntxuav thiab rho tawm cov tshuaj sib xyaw los ntawm cov qauv sib xyaw ua ke. Cov kem no yog tsim los nrog cov theem ruaj khov uas ua los ntawm silica, muab kev xaiv siab thiab ua haujlwm tau zoo hauv cov txheej txheem sib cais.
Peb cov kab SPE silica muaj ntau qhov loj me, suav nrog 1, 3, 6, thiab 10 ml, ua kom tau raws li ntau yam kev xav tau. Cov txheej txheem tsim khoom siv rau cov kab no tau tsim los kom txo qhov sib txawv thiab txhim kho cov txheej txheem rov qab thiab ntxuav, kom ntseeg tau tias muaj kev ua haujlwm zoo sib xws thiab txhim khu kev qha.
Cov theem ruaj khov ntawm peb cov silica base SPE columns muaj nyob rau hauv ntau yam tshuaj lom neeg, txhua tus tau tsim los rau cov kev xav tau sib cais tshwj xeeb. Cov no suav nrog C18 endcapped octadecyl, C18 unendcapped octadecyl, C8 octyl, CN cyanopropyl, PSA primary-secondary amine, NH2 aminopropyl, SAX strong anion exchange, thiab SCX strong cation exchange. Cov tshuaj lom neeg sib txawv no tso cai rau kev rho tawm thiab ntxuav ntau yam analytes, ua rau cov kem muaj ntau yam thiab hloov kho tau rau ntau yam kev sib tw analytics.
Piv txwv li, theem C18 endcapped octadecyl yog qhov zoo tagnrho rau kev khaws cia thiab kev sib cais ntawm cov tshuaj tsis-polar thiab cov tshuaj moderately polar, thaum theem CN cyanopropyl muab kev xaiv zoo dua rau cov tshuaj polar. Theem PSA thawj-theem nrab amine yog qhov tsim nyog rau kev rho tawm cov tshuaj acidic, thiab theem SAX thiab SCX yog tsim tshwj xeeb rau cov ntawv thov pauv ion.
Ntxiv rau lawv txoj kev xaiv ntau yam, peb cov kab SPE silica base kuj paub txog lawv lub peev xwm thauj cov qauv siab, rov ua dua zoo heev, thiab qib qis ntawm kev khi tsis tshwj xeeb, ua kom ntseeg tau tias muaj tseeb thiab txhim khu kev qha. Txawm siv rau hauv kev tshuaj, ib puag ncig, khoom noj, lossis kev tshuaj xyuas forensic, cov kab no muab kev ua tau zoo thiab ruaj khov, ua tau raws li qhov xav tau ntawm cov chaw soj ntsuam niaj hnub.
Xaus lus, cov kem SPE uas muaj silica yog cov cuab yeej tseem ceeb rau kev npaj cov qauv hauv kev tshuaj ntsuam xyuas, thiab peb cov kem, nrog rau lawv cov tshuaj sib txawv thiab kev ua tau zoo, tau tsim los ua kom tau raws li cov kev xav tau ntawm cov kws tshawb fawb tshuaj ntsuam xyuas. Nrog lawv cov kev xaiv siab, kev ua haujlwm zoo, thiab lub peev xwm, cov kem no ua lub luag haujlwm tseem ceeb hauv kev rho tawm thiab ntxuav cov tshuaj sib xyaw los ntawm cov qauv sib xyaw.
**Lub Npe: Qhib lub peev xwm ntawm cov kab SPE uas ua los ntawm silica rau kev npaj cov qauv zoo dua**
Hauv kev tshuaj xyuas tshuaj, qhov tseem ceeb ntawm kev npaj cov qauv tsis tuaj yeem hais ntau dhau. Ib qho ntawm cov cuab yeej zoo tshaj plaws rau lub hom phiaj no yog lub thawv rho tawm cov khoom siv silica (SPE) uas tsim los ua kom yooj yim rau cov txheej txheem rho tawm, cov thawv no muaj ntau yam peev xwm, suav nrog 1, 3, 6, thiab 10 mL qhov ntau thiab tsawg, kom haum rau ntau yam ntim thiab hom qauv.
Peb cov kab SPE uas ua los ntawm silica tau tsim los kom ua tib zoo kom ntseeg tau tias muaj kev hloov pauv tsawg kawg nkaus hauv kev ua haujlwm. Qhov no yog qhov tseem ceeb rau cov kws tshawb fawb thiab cov kws tshuaj ntsuam xyuas uas vam khom cov txiaj ntsig zoo sib xws. Cov txheej txheem tsim khoom uas peb siv tsis yog tsuas yog ua rau kom rov qab tau cov khoom siv tshuaj ntsuam xwb, tab sis kuj txhim kho cov txheej txheem ntxuav, ua rau nws yooj yim dua kom tau txais cov qauv huv si.
Ntawm ntau txoj kev xaiv muaj, peb cov kem muaj peb hom theem ruaj khov sib txawv: C18 Endcapped Octadecyl, C18 Unendcapped Octadecyl, thiab C8 Octyl. C18 Endcapped Octadecyl kem zoo rau ob qho tib si polar thiab non-polar compounds, muab kev khaws cia zoo heev thiab kev xaiv. C18 Unendcapped Octadecyl kem muaj cov txiaj ntsig zoo sib xws tab sis tshwj xeeb tshaj yog haum rau cov analytes tsis-polar, ua kom muaj kev ua tau zoo tshaj plaws thoob plaws ntau yam kev siv. Rau cov neeg ua haujlwm nrog cov sib xyaw polar tsawg dua, C8 Octyl kem muab txoj hauv kev sib npaug los ua kom tiav kev sib cais zoo thaum tswj hwm kev rov qab zoo.
Txawm koj ua haujlwm hauv kev tshuaj, kev sim ib puag ncig, lossis kev nyab xeeb zaub mov, peb cov kab SPE uas ua los ntawm silica tuaj yeem ua tau raws li koj cov kev xav tau kev tshuaj xyuas. Los ntawm kev xaiv cov kab uas haum rau koj daim ntawv thov tshwj xeeb, koj tuaj yeem txhim kho kev ua haujlwm ntawm cov txheej txheem npaj cov qauv, ua rau muaj kev ntseeg siab dua thiab rov ua dua tau. Paub txog lub zog ntawm cov kab SPE uas ua los ntawm silica hnub no thiab txhim kho koj cov peev xwm tshuaj xyuas!