Temat: matrix-free laser desorption/ionization - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Laser generated gold nanoparticles for mass spectrometry of low molecular weight compounds
Autorzy:: Płaza-Altamer, Aneta
Kołodziej, Artur
Nizioł, Joanna
Ruman, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/31342654.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:: gold nanoparticles
laser generated nanomaterial
low molecular weight compounds
mass spectrometry
matrix-free laser desorption/ionization
surface-assisted desorption/ionization
nanocząstki złota
nanomateriał generowany laserowo
związki o małej masie cząsteczkowej
spektrometria mas
bezmatrycowa laserowa desorpcja/jonizacja
desorpcja/jonizacja wspomagana powierzchnią
Opis:: Preparation of gold nanoparticles (AuNPs) by pulsed fiber laser (PFL) laser generated nanomaterial (LGN) with the use of 2D galvo-scanner (2D GS) is described. The procedure of covering of custom-made stainless steel MALDI targets containing studied objects via nebulization is also presented. Examples of application of new method (PFL-2D GS LGN and nebulization) in laser desorption/ionization mass spectrometry (LDI MS) analyses are shown. These include tests with amino acids and also low molecular weight polymer.
Źródło:: Chemical Technology & Biotechnology; 2022, 3; 61-69
2720-6793
Pojawia się w:: Chemical Technology & Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Nanomateriały w spektrometrii mas z laserową desorpcją/jonizacją wspomaganą powierzchnią
Nanomaterials applied in surface-assisted laser desorption/ionization mass spectrometry
Autorzy:: Arendowski, Adrian
Powiązania:: https://bibliotekanauki.pl/articles/2200434.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: laserowa desorpcja/jonizacja
metody bezmatrycowe
nanocząstki
SALDI
spektrometria mas
laser desorption/ionization
mass spectrometry
matrix-free methods
nanoparticles
Opis:: Laser desorption/ionization (LDI) is one of the most popular ionization techniques currently used in mass spectrometry (MS). This technique is most commonly used in a variant of matrix-assisted laser desorption/ionization (MALDI), which uses low molecular weight organic acid mixed with the sample to support the ionization process. However, this approach has some shortcomings such as: high chemical background in the spectral region below m/z 700 making it difficult to analyze compounds giving signals in this spectral region, inhomogeneous co-crystallization of analyte and matrix leading to the formation of so-called "sweet spots", i.e. inhomogeneous distribution of analyte in the crystallizing matrix. For these reasons, increasing research attention is focused on the possibilities offered by the use of matrix-free systems based on nanostructures in laser methods, which are referred to as surface-assisted laser desorption/ionization (SALDI). The use of nanostructures in LDI MS has made it possible to analyze low molecular compounds, often at very low concentrations, without the presence of matrix-derived chemical background, contributing to more applications of the LDI MS method. This work describes what the SALDI technique is and reviews the nanomaterials used in different variations of the approach. Among the described materials used in SALDI there are nanomaterials based on carbon and silicon, including the DIOS method, as well as techniques based on nanoparticles of gold, silver, platinum and titanium oxide. For each method, application examples are given for the detection of different classes of chemical compounds, often also in complex biological mixtures.
Źródło:: Wiadomości Chemiczne; 2022, 76, 9-10; 735--754
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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