Gold nanoparticles bridging infra-red spectroscopy and laser desorption/ionization mass spectrometry for direct analysis of over-the-counter drug and botanical medicines

2016 ◽  
Vol 919 ◽  
pp. 62-69 ◽  
Author(s):  
Siu-Leung Chau ◽  
Ho-Wai Tang ◽  
Kwan-Ming Ng
Keyword(s):  
Mass Spectrometry ◽  
Gold Nanoparticles ◽  
Laser Desorption ◽  
Direct Analysis ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Over The Counter ◽  
Desorption Ionization ◽  
Infra Red ◽  
Botanical Medicines

scholarly journals Diagnosis of Agglomeration and Crystallinity of Active Pharmaceutical Ingredients in Over the Counter Headache Medication by Electrospray Laser Desorption Ionization Mass Spectrometry Imaging

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 610
Author(s):  
Mariann Inga Van Meter ◽  
Salah M. Khan ◽  
Brynne V. Taulbee-Cotton ◽  
Nathan H. Dimmitt ◽  
Nathan D. Hubbard ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Mass Spectrometry Imaging ◽  
Laser Desorption ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Active Pharmaceutical Ingredients ◽  
Laser Desorption Ionization ◽  
Over The Counter ◽  
Pharmaceutical Ingredients ◽  
Desorption Ionization

Agglomeration of active pharmaceutical ingredients (API) in tablets can lead to decreased bioavailability in some enabling formulations. In a previous study, we determined that crystalline APIs can be detected as agglomeration in tablets formulated with amorphous acetaminophen tablets. Multiple method advancements are presented to better resolve agglomeration caused by crystallinity in standard tablets. In this study, we also evaluate three “budget” over-the-counter headache medications (subsequently labeled as brands A, B, and C) for agglomeration of the three APIs in the formulation: Acetaminophen, aspirin, and caffeine. Electrospray laser desorption ionization mass spectrometry imaging (ELDI-MSI) was used to diagnose agglomeration in the tablets by creating molecular images and observing the spatial distributions of the APIs. Brand A had virtually no agglomeration or clustering of the active ingredients. Brand B had extensive clustering of aspirin and caffeine, but acetaminophen was observed in near equal abundance across the tablet. Brand C also had extensive clustering of aspirin and caffeine, and minor clustering of acetaminophen. These results show that agglomeration with active ingredients in over-the-counter tablets can be simultaneously detected using ELDI-MS imaging.

Functional gold nanoparticles coupled with laser desorption ionization mass spectrometry for bioanalysis

2016 ◽  
Vol 8 (46) ◽  
pp. 8123-8133 ◽  
Author(s):  
Binesh Unnikrishnan ◽  
Chia-Yin Chang ◽  
Han-Wei Chu ◽  
Anisha Anand ◽  
Chih-Ching Huang
Keyword(s):  
Mass Spectrometry ◽  
Gold Nanoparticles ◽  
Gold Cluster ◽  
Pulsed Laser ◽  
Laser Desorption ◽  
Cluster Ions ◽  
Ionization Mass ◽  
Laser Desorption Ionization ◽  
Desorption Ionization ◽  
Surface Ligand

Monitoring of surface ligand and gold cluster ions produced by pulsed-laser-induced desorption/ionization of gold nanoparticles enables the transduction and amplification of mass signals for biosensing and bioimaging applications.

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