Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Coupling the liquid sampling – atmospheric pressure glow discharge, a combined atomic and molecular (CAM) ionization source, to a reduced-format mass spectrometer for the analysis of diverse species

Author affiliations

Abstract

The LS-APGD microplasma has shown potential as a combined atomic and molecular (CAM) ionization source, though to this point it has been solely interfaced with large, laboratory-scale instruments. There are many instances wherein reduced-format, lower operating overhead, analyzers are appropriate. To this end, the LS-APGD has been coupled with an Advion ExpressionL Compact Mass Spectrometry (CMS) for the analysis of diverse samples. This instrument has been previously travel hardened in accordance to MIL-SPEC-810, demonstrating its suitability for in-field analysis. The coupling of the LS-APGD to this instrument expands its capability for diverse analyses, with early-stage figures of merit presented here. With this new coupling, a thorough optimization of both the instrument ion optics and the LS-APGD operating parameters was necessary as this platform does not have a direct method for collisional dissociation of potentially-deleterious molecular species. Under the optimized conditions, analytical response curves were constructed for Na, Rb, Cs, and Tl, demonstrating detection limits between 17.6–146 ng mL−1 (single ng, absolute). Furthermore, CAM sampling capabilities can be realized upon changing from a 2% HNO3 to a 70 : 30 MeOH : H2O solvent system, providing molecular-level chemical information readily obtained from atomic ionization sources such as the inductively coupled plasma (ICP-MS). Here detection limits between 1–32 nM (single pg, absolute) were obtained for caffeine, acetaminophen, Δ9-tetrahydrocannabidiol, sulfadimethoxine, terfenadine, and reserpine. The unique features of the CAM ionization source on this flexible MS platform hold promise for many operation environments.

Graphical abstract: Coupling the liquid sampling – atmospheric pressure glow discharge, a combined atomic and molecular (CAM) ionization source, to a reduced-format mass spectrometer for the analysis of diverse species

Back to tab navigation

Supplementary files

Article information


Submitted
06 Mar 2020
Accepted
20 May 2020
First published
28 May 2020

J. Anal. At. Spectrom., 2020, Advance Article
Article type
Paper

Coupling the liquid sampling – atmospheric pressure glow discharge, a combined atomic and molecular (CAM) ionization source, to a reduced-format mass spectrometer for the analysis of diverse species

T. J. Williams and R. K. Marcus, J. Anal. At. Spectrom., 2020, Advance Article , DOI: 10.1039/D0JA00094A

Social activity

Search articles by author

Spotlight

Advertisements