Mass Spectrometric Characterization of Oligo- and Polysaccharides and Their Derivatives

2011 ◽  
pp. 105-174 ◽  
Author(s):  
Petra Mischnick
Keyword(s):  
Mass Spectrometric

Fast Atom Bombardment Mass Spectrometric Characterization of Poly(O-Toluidine)

1991 ◽  
Author(s):  
K. Balasaunmugam ◽  
K. G. Owens ◽  
K. F. Hsueh ◽  
P. Hoontrakul ◽  
M. A. Olsen
Keyword(s):  
Fast Atom Bombardment ◽  
Mass Spectrometric

scholarly journals Mass Spectrometric Calibration Procedure for Real-Time Detection of Lighter Hydrocarbons

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2123
Author(s):  
Makuachukwu F. Mbaegbu ◽  
Puspa L. Adhikari ◽  
Ipsita Gupta ◽  
Mathew Rowe
Keyword(s):  
Real Time ◽  
Mass Spectrometer ◽  
Calibration Procedure ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Selection ◽  
Mass Spectrometric Method ◽  
Mass Spectrometers ◽  
Drilling Rig

Determining gas compositions from live well fluids on a drilling rig is critical for real time formation evaluation. Development and utilization of a reliable mass spectrometric method to accurately characterize these live well fluids are always challenging due to lack of a robust and effectively selective instrument and procedure. The methods currently utilized need better calibration for the characterization of light hydrocarbons (C1–C6) at lower concentrations. The primary goal of this research is to develop and optimize a powerful and reliable analytical method to characterize live well fluid using a quadruple mass spectrometer (MS). The mass spectrometers currently being used in the field have issues with detection, spectra deconvolution, and quantification of analytes at lower concentrations (10–500 ppm), particularly for the lighter (<30 m/z) hydrocarbons. The objectives of the present study are thus to identify the detection issues, develop and optimize a better method, calibrate and QA/QC the MS, and validate the MS method in lab settings. In this study, we used two mass spectrometers to develop a selective and precise method to quantitatively analyze low level lighter analytes (C1–C6 hydrocarbons) with masses <75 m/z at concentrations 10–500 ppm. Our results suggest that proper mass selection like using base peaks with m/z 15, 26, 41, 43, 73, and 87, respectively, for methane, ethane, propane, butane, pentane, and hexane can help detect and accurately quantify hydrocarbons from gas streams. This optimized method in quadrupole mass spectrometer (QMS) will be invaluable for early characterization of the fluid components from a live hydrocarbon well in the field in real time.

Isolation and mass spectrometric characterization of an oxidized form of vasostatin I, anN-terminal chromogranin A-derived protein, from bovine chromaffin cells

1995 ◽  
Vol 30 (11) ◽  
pp. 1599-1604 ◽  
Author(s):  
L. Dillen ◽  
X. Y. Zhang ◽  
M. Claeys ◽  
F. Liang ◽  
W. P. De Potter ◽  
...  
Keyword(s):  
Chromogranin A ◽  
Chromaffin Cells ◽  
Mass Spectrometric ◽  
Bovine Chromaffin Cells

ChemInform Abstract: Mass Spectrometric Studies on the Fragmentation and Structural Characterization of Aminoacyl Derivatives of Kanamycin A.

ChemInform ◽  
2010 ◽  
Vol 30 (2) ◽  
pp. no-no
Author(s):  
S. I. KOTRETSOU ◽  
V. CONSTANTINOU-KOKOTOU
Keyword(s):  
Structural Characterization ◽  
Mass Spectrometric ◽  
Derivatives Of

Mass spectrometric and NMR characterization of metabolites of roxifiban, a potent and selective antagonist of the platelet glycoprotein IIb/IIIa receptor

Xenobiotica ◽  
2000 ◽  
Vol 30 (11) ◽  
pp. 1091-1110 ◽  
Author(s):  
A. E. Mutlib ◽  
S. Diamond ◽  
J. Shockcor ◽  
R. Way ◽  
G. Nemeth ◽  
...  
Keyword(s):  
Mass Spectrometric ◽  
Platelet Glycoprotein ◽  
Selective Antagonist ◽  
Nmr Characterization

scholarly journals Lipopeptides from the Banyan Endophyte, Bacillus subtilis K1: Mass Spectrometric Characterization of a Library of Fengycins

2012 ◽  
Vol 23 (10) ◽  
pp. 1716-1728 ◽  
Author(s):  
Khyati V. Pathak ◽  
Haresh Keharia ◽  
Kallol Gupta ◽  
Suman S. Thakur ◽  
Padmanabhan Balaram
Keyword(s):  
Bacillus Subtilis ◽  
Mass Spectrometric
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