A cikin dakin gwaje-gwaje na nazari na zamani, chromatography ya fi ka'idar yau da kullum; rawa ce mai rikitarwa ta hulɗar kwayoyin halitta. Ko kuna ƙididdige ƙazantar magunguna ko gano gurɓataccen muhalli a matakan ganowa, fahimtar mahimman ilimin kimiyyar lissafi na rabuwarku shine abin da ke bambanta ƙwararren masani daga ƙwararren chromatographer.
Nasara a cikin dakin gwaje-gwaje ba wai kawai ta fito ne daga saitunan kayan aiki masu tsayi ba. Yana rayuwa cikin haɗin kai tsakanin tsarin sinadarai na hanyar ku da ingantattun abubuwan amfani waɗanda ke kare amincin samfurin ku. Ga waɗanda ke kewaya da rikitattun abubuwan
HPLC vs LC-MS: Wanne za a zaɓa
, ko fafitikar da tushe mara tushe, wannan jagorar yana raba sirrin gefen benci don cimma manyan bayanai na duniya da haɓaka kayan aiki.
Fahimtar Hannun Hannun Hannun Hannu: Menene Juya Halin Chromatography?
Don amsa tambayar tushe-menene juzu'i na chromatography-dole ne mutum ya kalli bayan ma'anar littafin. A ainihinsa, shine rabuwa bisa "tsoron ruwa" (hydrophobicity). A cikin juzu'i na babban matsin ruwa na chromatography (RP-HPLC), muna amfani da lokacin da ba na iyakacin duniya ba da lokacin wayar hannu don warware kwayoyin ta hanyar halayensu na hydrophobic.
Chemistry na Sarkar C18 (Octadecyl).
Mafi yawan lokaci na tsaye ya ƙunshi ɓangarorin tushen silica waɗanda ke ɗaure da sarƙoƙi na C18 (octadecyl). Daga gwaninta na, yawan waɗannan sarƙoƙi na C18 da ingancin tallafin silica sun ƙayyade rashin ƙarfi na hanyar ku. Yawancin manazarta suna cin karo da wutsiya kololuwa yayin da suke nazarin mahalli na asali. Wannan sau da yawa yana haifar da saura ƙungiyoyin silanol a saman silica suna aiki azaman wuraren musayar ion maras so.
Don magance wannan, muna amfani da ginshiƙi mai rufe, inda ƙananan silanes "mask" waɗannan rukunin yanar gizon masu aiki. Koyaya, ko da mafi kyawun ginshiƙi ba zai iya gyara allura mara kyau ba. Idan kololuwar chromatographic ɗin ku ta yi kama da gurɓatacce tun kafin ta kai ga shafi, duba vial ɗin ku. Amfani da high-tsarki
9mm Short Thread Vials tare da Universal Fit
yana tabbatar da cewa analyte ɗinku baya shiga bangon vial kafin allura ta ɗauka.
Fasahar Mai Gyaran Halittu a Ci gaban Hanyar HPLC
Lokacin riƙe manazartan ku ana gudanar da shi ta hanyar tattarawar HPLC mai gyara kwayoyin halitta. Ta hanyar daidaita ma'aunin acetonitrile ko methanol zuwa buffer ɗin ruwa, kuna kunna "ƙarfin haske" na lokacin wayar hannu.
Rikici na gama gari da nake gani a hanyar canja wuri shine rashin fahimta mai lankwasa gradient elution. Idan kun yi saurin haɓaka kayan gyaran jikin ku da sauri, kuna rasa ƙuduri; a hankali a hankali, kuma kuna fama da ƙarar faɗaɗawa da ɓarnawar sauran ƙarfi. Lokacin canzawa tsakanin
Analytical vs Preparative HPLC
, Gudanar da gangaren gradient ya zama babban abu na farko a cikin nasara mai girma. Ka tuna, Acetonitrile yana ba da ƙarancin danko da ƙarfin haɓaka mai girma, yayin da Methanol zai iya ba da zaɓi daban-daban don mahaɗan polar da ACN na iya rasa.
Ƙididdigar odar hasashe ta GC: Hasashen Haɗin Kan
Hasashen odar gc elution yana ɗaya daga cikin ƙalubale masu lada ga mai chromatographer gas. Ba kamar HPLC ba, inda sunadarai masu ƙarfi shine babban lefa na farko, "Trinity of Separation" ke tsara rabuwar GC: wurin tafasa, polarity na kwayoyin halitta, da shirye-shiryen zafin jiki.
Thermodynamics vs. Dipole Interactions
A cikin lokacin da ba na polar ba, odar gc elution yana bin wurin tafasa sosai. Ƙarin mahalli masu canzawa suna fita da farko. Koyaya, wasan yana canzawa lokacin da kuke amfani da ginshiƙi na polar kamar PEG\/Wax. Kwanan nan na gudanar da aikin da ya ƙunshi isomers inda wuraren tafasa sun kusan kama. Ta hanyar canzawa zuwa lokaci na polar, haɗin gwiwar dipole-dipole ya ba mu damar raba waɗannan mahadi bisa tsarin su na lantarki maimakon girman su.
Don babban aiki mai hankali kamar bincike na gano muhalli, amincin kwandon samfurin ku yana da mahimmanci. Amfani
20mm Crimp Top Headspace Vials
yana hana hasarar sauye-sauyen manazarta, tabbatar da cewa yawan jujjuyawar ku ta dogara ne akan ainihin wakilcin samfurin ku, ba juzu'i ba.
HPLC vs LC-MS: Kewayawa Canjin Hankali
Tambaya akai-akai a cikin dakin binciken mu shine: "Yaushe zamu motsa daga HPLC vs LC-MS?" Amsar ta ta'allaka ne akan hankalin da ake buƙata. Yayin da HPLC tare da gano UV yana da kyau ga QC na yau da kullun a matakan microgram, ana buƙatar LC-MS lokacin da kuke buƙatar gano matakan picogram ko gano abubuwan da ba a sani ba a cikin matrices masu rikitarwa.
Idan kuna matsawa zuwa LC-MS, zaɓinku na vials ya zama mafi mahimmanci. Matsakaicin iyakoki na iya shigar da masu yin robobi zuwa lokacin wayar hannu, ƙirƙirar "Ghost Peaks" waɗanda ke damun chromatogram ɗin ku. Wannan shine dalilin da ya sa Aijiren
Ƙwallon Ƙwallon Ƙwallon Ƙwaƙwalwa
su ne madaidaici a cikin dakunan gwaje-gwajen MS-suna kawar da haɗarin faɗuwar septa a cikin vial ko leaching gurɓatawa a cikin ganowa.
Anatomy na Cikakkiyar Kololuwar Chromatographic
Kowane kololuwar chromatographic kayan aikin bincike ne. Ƙwararren Gaussian mai kaifi, mai siffa yana gaya muku cewa an inganta tsarin ku. "Kafada" ko "wutsiya" suna gaya muku cewa wani abu ba daidai ba ne, sau da yawa yana da alaƙa da hardware ko mataccen ƙarar.
Kawar da Matattu Ƙarar da Ƙarfin Rumbun
Ɗaya daga cikin masu kashe ƙuduri na shiru shine mataccen ƙarar. Idan akwai wata tazara tsakanin allurar ku da kasan vial, samfurin ya watse. Don ƙananan samfura, koyaushe ina ba da shawarar amfani da Conical Inserts. Waɗannan abubuwan da ake sakawa suna tilasta samfurin zuwa ƙunƙuntacciyar hanya, a tsaye, yana tabbatar da allurar "filogi mai kaifi". Wannan kai tsaye yana haifar da mafi girman kololuwa da mafi kyawun sigina-zuwa amo, musamman a cikin tsarin matsananciyar matsa lamba inda tarwatsewa shine abokan gaba.
Shirya matsala Kamar Pro: Daga Baseline Noise zuwa Septa Coring
A cikin shekarun da na yi na magance matsalar, na gano cewa kashi 70% na al'amuran kayan aiki ne ainihin abubuwan da ake amfani da su.
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Hayaniyar Baseline & Kololuwar fatalwa: Idan kun ga kololuwa inda bai kamata ba, masu tacewa na iya zama masu laifi. Koyaushe koma zuwa
Cikakken Jagora zuwa 0.22 Micron Filters
kafin zabar tacewa na sirinji.
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Septa Coring: Idan ka ga guntun silicone a cikin vial naka, allurarka tana "kore" septa. Wannan yana faruwa tare da iyakoki marasa inganci. Mu ND11 Crimp Caps da 10-425 Screw Caps an yi su daidai-injiniya don jure huda da yawa ba tare da rarrabuwa ba.
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Kwanciyar hankali a Ma'aji: Don hanyoyin EPA ko ajiya na dogon lokaci, ta amfani da
24-400 EPA Vials
wanda aka yi da gilashin borosilicate yana tabbatar da asarar ƙarfi da sifili.
Me Yasa Data Integrity farawa da Consumable
Sau da yawa muna kashe dalar Amurka 50,000 akan babban tsari, sannan muyi ƙoƙarin adana pennies akan vial. A cikin gogewa na, ƙaramin ƙaramin vial shine abu mafi tsada a cikin lab ɗin ku saboda yana haifar da "sake gudu" da "rashin inganci."
Ko kuna buƙatar 1ml Shell Vials don sauƙi na chromatography ko 18mm Screw Thread Headspace Vials don GC mai sarrafa kansa, Aijiren yana ba da daidaiton da masana ke buƙata. Muna tabbatar da cewa odar ku ta gc elution tana iya sakewa kowace rana, kuma kololuwar ku ta chromatographic ta kasance mai kaifi kamar ranar da kuka haɓaka hanyar.
Taimakon Kwararru & Tambayoyi: Shin kuna fuskantar sakamako marasa daidaituwa ko kuna fama da haɓaka hanyar? Bari mu inganta aikinku tare. Tuntube ni don tuntuɓar fasaha:
Kammalawa Kwarewar abin da ke jujjuya lokaci da ƙware abubuwan kayan aikin ku tafiya ce ta ci gaba da koyo. Ta zabar madaidaicin gyare-gyaren kwayoyin halitta na HPLC da mafi kyawun kayan masarufi, kuna saka hannun jari ga gaskiyar bayanan ku. Kada ku bari ƙaramin kwano ya lalata kyakkyawar hanyar da kuka shafe makonni tana haɓaka.
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