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Enhanced method performances for conventional and chiral CE-ESI/MS analyses in plasma.
Electrophoresis. 2006 Apr; 27(8):1537-46.E

Abstract

Due to its high efficiency, selectivity, and sensitivity, CE-ESI/MS has evolved as an efficient technique for the drugs and metabolites analysis in biological matrices. However, a sample preparation is mandatory prior to CE-ESI/MS analysis. To achieve fast and simplified sample preparation of plasma samples, protein precipitation (PP) and liquid-liquid extraction (LLE) were used with two injection techniques: hydrodynamic (HD) and electrokinetic (EK) injection. CE-ESI/MS analyses of pharmaceutical compounds and amphetamine derivatives were developed. Detection limits of 1 ppm were reached with PP and HD injection whereas 1 ppb was detected when samples were prepared with LLE and injected by EK. Same experiments were performed for stereoselective determinations in partial-filling mode and detection limits achieved were equivalent to conventional analysis (0.5 ppb per enantiomer). When complex matrices are analyzed, MS signal suppression or enhancement effects are generally not reproducible and could compromise results with ESI. Therefore, matrix effect was investigated in CE-ESI/MS with a commercially available coaxial sheath-liquid ESI interface used as postcapillary infusion system to determine MS signal alterations. Matrix effects were differentially evidenced according to the selected sample preparation. With PP, signal suppression was observed out of the analyses migration window, while for LLE no relevant matrix effect occurred in all experiments.

Authors+Show Affiliations

Schappler J
Laboratory of Pharmaceutical Analytical Chemistry, School of Pharmaceutical Sciences, University of Geneva, University of Lausanne,Geneva, Switzerland.
Guillarme D
No affiliation info available
Prat J
No affiliation info available
Veuthey JL
No affiliation info available
Rudaz S
No affiliation info available

MeSH

AmphetaminesElectrophoresis, CapillaryMethadonePharmaceutical PreparationsSpectrometry, Mass, Electrospray IonizationStereoisomerismTramadolgamma-Cyclodextrins

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16532520

Citation

Schappler, Julie, et al. "Enhanced Method Performances for Conventional and Chiral CE-ESI/MS Analyses in Plasma." Electrophoresis, vol. 27, no. 8, 2006, pp. 1537-46.
Schappler J, Guillarme D, Prat J, et al. Enhanced method performances for conventional and chiral CE-ESI/MS analyses in plasma. Electrophoresis. 2006;27(8):1537-46.
Schappler, J., Guillarme, D., Prat, J., Veuthey, J. L., & Rudaz, S. (2006). Enhanced method performances for conventional and chiral CE-ESI/MS analyses in plasma. Electrophoresis, 27(8), 1537-46.
Schappler J, et al. Enhanced Method Performances for Conventional and Chiral CE-ESI/MS Analyses in Plasma. Electrophoresis. 2006;27(8):1537-46. PubMed PMID: 16532520.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced method performances for conventional and chiral CE-ESI/MS analyses in plasma. AU - Schappler,Julie, AU - Guillarme,Davy, AU - Prat,Josiane, AU - Veuthey,Jean-Luc, AU - Rudaz,Serge, PY - 2006/3/15/pubmed PY - 2006/7/11/medline PY - 2006/3/15/entrez SP - 1537 EP - 46 JF - Electrophoresis JO - Electrophoresis VL - 27 IS - 8 N2 - Due to its high efficiency, selectivity, and sensitivity, CE-ESI/MS has evolved as an efficient technique for the drugs and metabolites analysis in biological matrices. However, a sample preparation is mandatory prior to CE-ESI/MS analysis. To achieve fast and simplified sample preparation of plasma samples, protein precipitation (PP) and liquid-liquid extraction (LLE) were used with two injection techniques: hydrodynamic (HD) and electrokinetic (EK) injection. CE-ESI/MS analyses of pharmaceutical compounds and amphetamine derivatives were developed. Detection limits of 1 ppm were reached with PP and HD injection whereas 1 ppb was detected when samples were prepared with LLE and injected by EK. Same experiments were performed for stereoselective determinations in partial-filling mode and detection limits achieved were equivalent to conventional analysis (0.5 ppb per enantiomer). When complex matrices are analyzed, MS signal suppression or enhancement effects are generally not reproducible and could compromise results with ESI. Therefore, matrix effect was investigated in CE-ESI/MS with a commercially available coaxial sheath-liquid ESI interface used as postcapillary infusion system to determine MS signal alterations. Matrix effects were differentially evidenced according to the selected sample preparation. With PP, signal suppression was observed out of the analyses migration window, while for LLE no relevant matrix effect occurred in all experiments. SN - 0173-0835 UR - https://www.unboundmedicine.com/medline/citation/16532520/Enhanced_method_performances_for_conventional_and_chiral_CE_ESI/MS_analyses_in_plasma_ DB - PRIME DP - Unbound Medicine ER -