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Updated: May 14, 2026

A Microfluidic Chip for ICPMS Sample Introduction

A Microfluidic Chip for ICPMS Sample Introduction

Published on: March 5, 2015

Dual-channel electrospray microchip.

Yu Lu¹, Fang Liu, Niels Lion

¹Laboratoire d'Electrochimie Physique et Analytique, Station 6, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

Journal of the American Society for Mass Spectrometry

|February 7, 2013

Summary

This summary is machine-generated.

A novel dual-channel electrospray microchip enables efficient mixing of aqueous samples with organic buffers for enhanced electrospray ionization mass spectrometry (ESI-MS) analysis, achieving high ion intensity.

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Area of Science:

Analytical Chemistry
Mass Spectrometry
Microfluidics

Background:

Electrospray ionization mass spectrometry (ESI-MS) is a powerful analytical technique.
Efficient sample introduction and ionization are crucial for high sensitivity in ESI-MS.
Conventional methods may face challenges in rapid mixing of aqueous samples with organic solvents.

Purpose of the Study:

To develop and characterize a dual-channel electrospray microchip for improved ESI-MS.
To investigate the effect of microchip geometry and buffer composition on ionization efficiency.
To achieve high ion intensity for aqueous samples in ESI-MS.

Main Methods:

Fabrication of a dual-channel electrospray microchip.
Integration of the microchip with an ESI-MS system.
Systematic investigation of geometric parameters (e.g., channel distance) and chemical parameters (organic buffer composition).

Main Results:

The dual-channel microchip facilitates rapid and effective mixing of aqueous samples with organic buffer at the Taylor cone.
Optimized geometric and chemical parameters lead to significantly enhanced ion intensity.
Demonstrated high ionization efficiency for aqueous samples.

Conclusions:

The developed dual-channel electrospray microchip offers a promising platform for sensitive ESI-MS analysis of aqueous samples.
The microchip design enables efficient ionization through rapid mixing at the Taylor cone.
This approach enhances ion signal intensity, improving analytical performance in ESI-MS.