alexa Reduction in Matrix-Related Signal Suppression Effects in Electrospray Ionization Mass Spectrometry Using On-Line Two-Dimensional Liquid Chromatography
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Rob Pascoe, Joe P Foley, Arkady I Gusev

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The effect of liquid chromatographic separation on matrix-related signal suppression in electrospray ionization mass spectrometry (LC−ESI-MS) was investigated. A method incorporating on-line two-dimensional liquid chromatography mass spectrometry (LC/LC−MS) was developed to compensate for matrix effects and signal suppression in qualitative and quantitative analysis. The LC/LC−MS(MS) approach was successfully applied for single-component and multicomponent analysis in a variety of complex matrixes. It was demonstrated that matrix-related signal suppression could be induced solely by (i) column overload, (ii) matrix component−analyte coelution, or a combination of each. Application of on-line orthogonal LC/LC separations can be effective in reducing both causes of matrix-related signal suppression effects i.e., column overload and matrix−analyte coelution for a variety of LCn/MSn applications.

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This article was published in Anal. Chem. and referenced in Journal of Chromatography & Separation Techniques

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