Characterization of blood in an encrustation on an African mask: spectroscopic and direct analysis in real time mass spectrometric identification of haem

The Analyst ◽  
2013 ◽  
Vol 138 (16) ◽  
pp. 4470 ◽  
Author(s):  
Daniel Fraser ◽  
Cathy Selvius DeRoo ◽  
Robert B. Cody ◽  
Ruth Ann Armitage
Keyword(s):  
Real Time ◽  
Direct Analysis ◽  
Mass Spectrometric ◽  
Spectrometric Identification ◽  
Mass Spectrometric Identification

Mass spectrometric identification and characterization of a new long-term metabolite of metandienone in human urine

2006 ◽  
Vol 20 (15) ◽  
pp. 2252-2258 ◽  
Author(s):  
Wilhelm Schänzer ◽  
Hans Geyer ◽  
Gregor Fußhöller ◽  
Natalia Halatcheva ◽  
Maxie Kohler ◽  
...  
Keyword(s):  
Human Urine ◽  
Mass Spectrometric ◽  
Spectrometric Identification ◽  
Mass Spectrometric Identification ◽  
Identification And Characterization

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.

scholarly journals Mass Spectrometric Identification of Increased C16 Ceramide Levels During Apoptosis

1999 ◽  
Vol 274 (43) ◽  
pp. 30580-30588 ◽  
Author(s):  
Rexford L. Thomas ◽  
Christopher M. Matsko ◽  
Michael T. Lotze ◽  
Andrew A. Amoscato
Keyword(s):  
Mass Spectrometric ◽  
Spectrometric Identification ◽  
Mass Spectrometric Identification
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