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Samenvatting Demo LC-MS bio-analytisch practicum

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Dit document omvat alle voorbereidende info omtrent het practicum 'demo LC-MS' van het vak Bio-analytisch practicum. Dit is te kennen leerstof voor het examen.

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Kwaliteitseisen waar LC-MS moet voldoen

Veel residuen worden in diverse matrices onderzocht => gebruik
LC-MS/MS om te detecteren en bevestigen => hier focus op
mycotoxinen in urine



1) Urinestaal
homogeniseren =
schudden
2) Hoeveelheid in
extractiebuis
3) Voeg extractiesolvent
toe
4) Schudden en
centrifugeren
5) Organische en waterige fase verkrijgen
6) De te bepalen componenten migreren naar organische fase
7) Organische fase afnemen en overbrengen naar extractiebuis
8) Na indampen van extractiesolvent wordt het residu heropgelost in
injectiesolvent van HPLC en overgebracht in HPLC-vile
9) Kleine hoeveelheid hiervan geïnjecteerd op HPLC kolom
10) Componenten gedetecteerd dmv tandem massaspectrometie



Schematische voorstelling
LC-MS

 HPLC (= scheidt
componenten)
 Massaspectrometer (=
detecteert en bevestigt
componenten)
 Processor (=
registreert resultaten)




Specifieke Zorbax kolom

Mobiele fasen worden met
vooraf bepaald
gradiëntprogramma over
kolom gepompt

,  kolom = vaste fase
elke component heeft specifieke retentie
 scheiding componenten
 mobiele fase A en
B worden in
verschillende
hoeveelheden
met elkaar
gemengd,
voordat ze over
de kolom
gepompt worden
 ifv tijd meer
mobiele fase B
over kolom (=
meer organische fase toevoegen)
 verandering polariteit mobiele fase
 scheiding componenten

!! na verwijderen v componenten herstelt originele samenstelling van
mobiele fase



Elke
component
die HPLC
verlaat wordt
naar




massaspectrometer gevoerd

 ionisatie van component




gescheiden componenten
betreden MS-apparaat via
klein capillair

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Uploaded on
October 30, 2025
Number of pages
14
Written in
2025/2026
Type
Summary
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