Issue 5, 2017

Parametric evaluation of ambient desorption optical emission spectroscopy utilizing a liquid sampling-atmospheric pressure glow discharge microplasma

Abstract

An evaluation of the parametric dependence of emission responses for ambient desorption optical emission spectroscopy utilizing a liquid sampling-atmospheric pressure glow discharge (AD-OES-LS-APGD) microplasma is described. The influence of optical sampling position, acid type, sample matrix, solution flow rate, discharge current, sample displacement, angle of solution electrode interelectrode separation, and gas flow rates on the emission response of copper as the model matrix and analyte are investigated. The type of acid plays a major role in the emission response of copper suggesting a possible reaction-based desorption process on the surface of the sample. The physical make-up of the matrix (bulk or thin film) has no major effect on the emission response. The incidence angle between the solution electrode and the target surface is shown to have a major influence on emission response, indicating that the momentum of the sheath gas plays some role in desorption or transport of vaporized material to the plasma. There is positive correlation between solution flow rate, electrode distance, and emission response while only a minor emission dependence is seen from sheath gas flow rate. A region of intense emission is observed in spatial profiling experiments. Further development will be directed towards a field deployable ambient source for analysis of solid samples with no requirement of sample preparation.

Graphical abstract: Parametric evaluation of ambient desorption optical emission spectroscopy utilizing a liquid sampling-atmospheric pressure glow discharge microplasma

Article information

Article type
Paper
Submitted
25 Sun 2017
Accepted
24 Kul 2017
First published
05 Dzi 2017

J. Anal. At. Spectrom., 2017,32, 931-941

Parametric evaluation of ambient desorption optical emission spectroscopy utilizing a liquid sampling-atmospheric pressure glow discharge microplasma

H. W. Paing and R. K. Marcus, J. Anal. At. Spectrom., 2017, 32, 931 DOI: 10.1039/C7JA00035A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements