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Publication Citation: Heat-Assisted Argon Electrospray Interface for Low-Flow Rate Liquid Sample Introduction in Plasma Spectrometry

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Author(s): Ryan G. Brennan; Savelas A. Rabb; Gregory C. Turk; Kaveh Jorabchi; William Rutkowski; Akbar Montaser;
Title: Heat-Assisted Argon Electrospray Interface for Low-Flow Rate Liquid Sample Introduction in Plasma Spectrometry
Published: September 04, 2009
Abstract: A heated ({approximately equal}90 °C) laminar flow interface has been designed to assist in the development of an electrospray sample introduction system for low-flow applications using inductively coupled plasma (ICP) spectrometry. This approach improves the analytical performance of the ICP compared to the use of gas mixtures (e.g., Ar-N2) and more concentrated organic solvents (e.g., 50 % methanol-water), typically required to achieve stable electrospray formation. The turbulence and the consequent droplet loss caused by high gas velocity around the electrospray capillary are eliminated by using a laminar-flow nebulizer gas with the aid of a flow diffuser. With the current design, a stable spray of 5 % methanol-water in a pure argon environment is achieved and successfully installed on an ICP optical emission spectrometer (ICP-OES) and on an ICP mass spectrometer (ICP-MS) for the first time.
Citation: Analytical Chemistry
Volume: 81
Issue: 19
Pages: pp. 8126 - 8133
Keywords: "electrospray", "ICP spectrometry", "low-flow rate", "sample introduction"
Research Areas: Inorganic Analytical Chemistry
PDF version: PDF Document Click here to retrieve PDF version of paper (2MB)