Post-gel permeation chromatography polymer blend analysis from a raster-deposited matrix-assisted laser desorption/ionization target

2003 ◽  
Vol 17 (21) ◽  
pp. 2450-2454 ◽  
Author(s):  
E. Peter Maziarz ◽  
X. Michael Liu ◽  
Gary A. Baker
Keyword(s):  
Polymer Blend ◽  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Laser Desorption Ionization ◽  
Desorption Ionization ◽  
Gel Permeation ◽  
Matrix Assisted Laser ◽  
Matrix Assisted Laser Desorption

A Modified Thermal Deposition Unit for Gel-Permeation Chromatography with Matrix-Assisted Laser Desorption/Ionization and Electrospray Ionization Time-of-Flight Analysis

2002 ◽  
Vol 8 (5) ◽  
pp. 397-401 ◽  
Author(s):  
E. Peter Maziarz ◽  
X. Michael Liu
Keyword(s):  
Time Of Flight ◽  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Laser Desorption Ionization ◽  
Thermal Deposition ◽  
Desorption Ionization ◽  
Gel Permeation ◽  
Continuous Deposition ◽  
Matrix Assisted Laser ◽  
Matrix Assisted Laser Desorption

We describe a modified commercially available thermal deposition unit that incorporates a post-column mixing cell for gel-permeation chromatography (GPC) effluent and matrix solution prior to continuous deposition onto a matrix-assisted laser desorption/ionization (MALDI) sample target. This modification overcomes the shortcomings of using a prefabricated matrix foil. This GPC MALDI method with time-of-flight (ToF) mass spectrometry is demonstrated by the analysis of a poly(dimethylsiloxane) (PDMS) sample used in the production of implantable device materials.

scholarly journals MALDI-TOF masa espektrometriaren erabilera polimeroak ezaugarritzeko

2019 ◽  
pp. 185-196
Author(s):  
Antonio Veloso ◽  
Rebeca Sola-Llano
Keyword(s):  
Gel Permeation Chromatography ◽  
Laser Desorption ◽  
Laser Desorption Ionization ◽  
Ionization Time ◽  
Maldi Tof ◽  
Flight Mass Spectrometry ◽  
Gel Permeation ◽  
Tof Ms ◽  
Matrix Assisted Laser ◽  
Matrix Assisted Laser Desorption

Gaur egun, materialak ezaugarritzekoerabiltzen diren teknikek informazio dezente uzten dute agerian, baina oraindik nahiko zaila da egiturari buruzko informazio osatua lortzea. Informazio hau garrantzi handikoa eta beharrezkoa da modu sakon batean polimero horietatik eratorritako materialen propietateak ezagutzeko. Polimeroak karakterizatzeko, Matrix Assisted Laser Desorption-Ionization Time of Flight Mass Spectrometry (MALDI/TOF MS) sortu zenetik, gero eta gehiago hedatu da teknika honen erabilera arlo desberdinetan.Masa-espektrometria teknika hau hedatu egin da polimeroen karakterizazioan, masa molarraren banaketaz gain, polimeroen unitate monomerikoa, polisakabanatzea eta kateen muturrak ezagutzea lor daitekeelako, hain zuzen ere.Lan honetan MALDI/TOF teknikaren oinarriak labur azalduko dira: masa espektrometroak nola funtzionatzen duen, zein den matrizearen garrantzia, zeintzuk diren matrize ohikoenak... Eta zenbait polimeroren karakterizazio adibideak aztertuko dira. Zehazki, bi karakterizazio-prozedura erakutsiko dira: Gel Permeation Chromatography (GPC) teknikan estandartzat erabiltzen den poliestireno homopolimeroa eta Latemul, emultsionatzaile polimerizagarri komertzial moduan erabiltzen den kopolimeroa.

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