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» Authors » Ralf Schiewek

Ralf Schiewek

Explore the profile of Ralf Schiewek including associated specialties, affiliations and a list of published articles. Areas
Snapshot
Articles 7
Citations 38
Followers 0
Related Specialties
Chemistry
Biomedical Engineering
Top 10 Co-Authors
Oliver J Schmitz
Thorsten Benter
Siegmar Gab
Matthias Lorenz
Klaus J Brockmann
Ronald Giese
Alberto Fernandez-Gutierrez
Andre M Deelder
Philippe Schmitt-Kopplin
Klaus Brockmann
Published In
Anal Bioanal Chem
J Chromatogr B Analyt Technol Biomed Life Sci
Angew Chem Int Ed Engl
J Am Soc Mass Spectrom
J Org Chem
Affiliations
Soon will be listed here.
Recent Articles
1.
Online spectral library for GC-atmospheric pressure chemical ionization-ToF MS
Pacchiarotta T, Derks R, Hurtado-Fernandez E, van Bezooijen P, Henneman A, Schiewek R, et al.
Bioanalysis . 2013 Jun; 5(12):1515-25. PMID: 23795930
Background: Invented more than three decades ago by Horning, GC-MS under atmospheric pressure chemical ionization (GC-APCI-MS) has only recently emerged from years of obscurity. However, the general acceptance of GC-APCI-MS...
2.
Efficient synthesis of carbazolyl- and thienyl-substituted beta-diketonates and properties of their red- and green-light-emitting Ir(III) complexes
Tian N, Thiessen A, Schiewek R, Schmitz O, Hertel D, Meerholz K, et al.
J Org Chem . 2009 Mar; 74(7):2718-25. PMID: 19260697
The efficient synthesis of novel beta-diketonates equipped with functional carbazolyl moieties and their subsequent transformations in 5-hexyl-thienyl substituted carbazole derivatives is presented by utilizing an effective Stille cross-coupling reaction. The...
3.
A universal ionization label for the APLI-(TOF)MS analysis of small molecules and polymers
Schiewek R, Monnikes R, Wulf V, Gab S, Brockmann K, Benter T, et al.
Angew Chem Int Ed Engl . 2008 Nov; 47(51):9989-92. PMID: 19009580
No abstract available.
4.
Development of a multipurpose ion source for LC-MS and GC-API MS
Schiewek R, Lorenz M, Giese R, Brockmann K, Benter T, Gab S, et al.
Anal Bioanal Chem . 2008 Jul; 392(1-2):87-96. PMID: 18661124
Over the past decade, multimode ion sources operating at atmospheric pressure (i.e., more than one ionization method is operative in the ion source enclosure) have received considerable interest. Simultaneous operation...
5.
Combining chip-ESI with APLI (cESILI) as a multimode source for analysis of complex mixtures with ultrahigh-resolution mass spectrometry
Schmitt-Kopplin P, Englmann M, Rossello-Mora R, Schiewek R, Brockmann K, Benter T, et al.
Anal Bioanal Chem . 2008 Jun; 391(8):2803-9. PMID: 18566804
Recently we have established atmospheric-pressure laser ionisation (APLI) as a method for coupling time-of-flight mass spectrometric detectors (TOF MS) with chromatographic systems (HPLC and GC) to allow two-photon ionisation of...
6.
The distribution of ion acceptance in atmospheric pressure ion sources: spatially resolved APLI measurements
Lorenz M, Schiewek R, Brockmann K, Schmitz O, Gab S, Benter T
J Am Soc Mass Spectrom . 2008 Jan; 19(3):400-10. PMID: 18187335
It is demonstrated that spatially resolved mass selected analysis using atmospheric pressure laser ionization mass spectrometry (APLI MS) represents a new powerful tool for mechanistic studies of ion-molecule chemistry occurring...
7.
Determination of the DNA methylation level of the marbled crayfish: an increase in sample throughput by an optimised sample preparation
Schiewek R, Wirtz M, Thiemann M, Plitt K, Vogt G, Schmitz O
J Chromatogr B Analyt Technol Biomed Life Sci . 2006 Dec; 850(1-2):548-52. PMID: 17175207
Using a previously described capillary electrophoretic method with laser-induced fluorescence detection the genomic methylation level can be determined exactly. We present a sample preparation that eliminates the surplus of fluorescence...