Direct analysis of samples under ambient condition by high-voltage-assisted laser desorption ionization mass spectrometry in both positive and negative ion mode

2013 ◽  
Vol 27 (5) ◽  
pp. 613-620 ◽  
Author(s):  
Xinxin Ren ◽  
Jia Liu ◽  
Chengsen Zhang ◽  
Hai Luo
Keyword(s):  
Mass Spectrometry ◽  
High Voltage ◽  
Laser Desorption ◽  
Direct Analysis ◽  
Ambient Condition ◽  
Negative Ion ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Desorption Ionization ◽  
Negative Ion Mode

scholarly journals Laser Desorption/Ionization Mass Spectrometry as a Potential Tool for Evaluation of Hydroxylation Degree of Various Types of Titanium Dioxide Materials

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6848
Author(s):  
Małgorzata Kasperkowiak ◽  
Monika Kurowska ◽  
Maciej Zalas ◽  
Rafał Frański
Keyword(s):  
Mass Spectrometry ◽  
Surface Characterization ◽  
Laser Desorption ◽  
Negative Ion ◽  
Ionization Mass Spectrometry ◽  
Hydroxyl Group ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Desorption Ionization ◽  
Negative Ion Mode

For many applications, TiO2 must have a unique surface structure responsible for its desirable physicochemical properties. Therefore the fast and easy methods of TiO2 surface characterization are of great interest. Heated TiO2 samples and dye-modified TiO2 samples were analyzed by laser desorption/ionization mass spectrometry. In the negative ion mode, two types of ions were detected, namely (TiO2)n− and (TiO2)nOH−. It has been established that the samples can be differentiated based on the relative ion abundances, especially with respect to the free hydroxyl group population. It indicates that laser desorption ionization mass spectrometry has the potential for the investigation of the surface properties of various TiO2 materials.

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