Nonionic surfactants used as exact mass internal standards for the 700-2100 Dalton mass range in fast atom bombardment mass spectrometry

1990 ◽  
Vol 62 (4) ◽  
pp. 322-327 ◽  
Author(s):  
Marshall M. Siegel ◽  
Rushung. Tsao ◽  
Steven. Oppenheimer ◽  
T. T. Chang
Keyword(s):  
Mass Spectrometry ◽  
Nonionic Surfactants ◽  
Fast Atom Bombardment ◽  
Mass Range ◽  
Exact Mass ◽  
Internal Standards

The study of organoarsenic compounds in fish and alga by exact mass measurement using fast atom bombardment mass spectrometry

Chemosphere ◽  
1987 ◽  
Vol 16 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Toshikazu Kaise ◽  
Shigenobu Watanabe ◽  
Kazutoshi Ito ◽  
Ken'ichi Hanaoka ◽  
Shoji Tagawa ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Mass Measurement ◽  
Exact Mass Measurement ◽  
Exact Mass

Wide mass range scanning for the fast atom bombardment mass spectrometry of very large compounds

1985 ◽  
Vol 57 (7) ◽  
pp. 1479-1480 ◽  
Author(s):  
R. J. Cotter ◽  
B. S. Larsen ◽  
D. N. Heller ◽  
J. E. Campana ◽  
Catherine. Fenselau
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Mass Range ◽  
Range Scanning

Effects of Doping on the Electrochemical and Electrical Properties of Poly(2,5-di(2-thienyl)pyrrole)

1999 ◽  
Vol 64 (8) ◽  
pp. 1357-1368 ◽  
Author(s):  
Enric Brillas ◽  
José Carrasco ◽  
Ramon Oliver ◽  
Francesc Estrany ◽  
Víctor Ruiz
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Oxidation Potential ◽  
Ethanolic Solution ◽  
Pt Electrode ◽  
Reversible Process ◽  
Oxidation Potentials ◽  
Lower Productivity ◽  
Polymeric Chains ◽  
Linear Molecules

The electropolymerization of 2,5-di(2-(thienyl)pyrrole) (SNS) on a Pt electrode from ethanolic solution with LiClO4 or LiCl as electrolyte has been studied by cyclic voltammetry (CV) and chronoamperometry (CA). In both media, a quasi-reversible process has been indicated by CV, reversing the scan at low oxidation potentials. Under these conditions, reducible positive charges formed in both oxidized polymers are compensated by the entrance of anions from solution. Elemental analysis reveals that polymers generated at a low oxidation potential by CA contain a 21.03% (w/w) of ClO4- or a 9.56% (w/w) of Cl-. The poly(SNS) doped with Cl- presents higher proportion of reducible positive charges, higher polymerization charge and lower productivity. A much higher electrical conductivity, however, has been found for the poly(SNS) doped with ClO4-. Both polymers are soluble in DMSO, acetone and methanol. The dimer, trimer, tetramer and pentamer have been detected as soluble and neutral linear oligomers by mass spectrometry-fast atom bombardment. The analysis of polymers by infrared spectroscopy confirms the predominant formation of linear molecules with α-α linkages between monomeric units. A condensation mechanism involving one-electron oxidation of all electrogenerated linear and neutral polymeric chains is proposed to explain the SNS electropolymerization.

Characterization of drug interferences caused by coelution of substances in gas chromatography/mass spectrometry confirmation of targeted drugs in full-scan and selected-ion monitoring modes

1994 ◽  
Vol 40 (2) ◽  
pp. 216-220 ◽  
Author(s):  
A H Wu ◽  
D Ostheimer ◽  
M Cremese ◽  
E Forte ◽  
D Hill
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography Mass Spectrometry ◽  
Spectrometric Analysis ◽  
Targeted Drugs ◽  
Selected Ion Monitoring ◽  
Internal Standards ◽  
Target Drug ◽  
Full Scan ◽  
Chromatographic Mass

Abstract Interference by substances coeluting with targeted drugs is a general problem for gas chromatographic/mass spectrometric analysis of urine. To characterize these interferences, we examined human urine samples containing benzoylecgonine and fluconazole, and other drug combinations including deuterated internal standards that coelute (ISd,c) with target drugs, by selected-ion monitoring (SIM) and full-scan mass spectrometry. We show that, by SIM analysis, detecting the presence of an interferent is dependent on the specific IS used for the assay. When an ISd,c is used, the presence of another coeluting substance (interferent) suggests that the intensity of IS ions is substantially diminished, because the interferent affects both the ISd,c and target drug. When a noncoeluting IS (ISnc) is used, the interferent cannot be discerned unless it coincidently contains one or more of the ions monitored for either the target drug or ISnc. Under full-scan analysis, a coeluting interferent is directly discernable by examining the total ion gas chromatogram.

scholarly journals A combined flow injection/reversed phase chromatography – high resolution mass spectrometry workflow for accurate absolute lipid quantification with 13C- internal standards

The Analyst ◽  
2021 ◽  
Author(s):  
Harald Schoeny ◽  
Evelyn Rampler ◽  
Yasin El Abiead ◽  
Felina Hildebrand ◽  
Olivia Zach ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Resolution ◽  
Flow Injection ◽  
High Resolution Mass Spectrometry ◽  
Reversed Phase ◽  
Internal Standards ◽  
Lipid Quantification ◽  
High Resolution Mass ◽  
Resolution Mass

We propose a fully automated novel workflow for lipidomics based on flow injection- followed by liquid chromatography high resolution mass spectrometry (FI/LC-HRMS). The workflow combined in-depth characterization of the lipidome...

scholarly journals A revised primary structure for neocarzinostatin based on fast atom bombardment and gas chromatographic-mass spectrometry.

1984 ◽  
Vol 259 (17) ◽  
pp. 10801-10806
Author(s):  
B W Gibson ◽  
W C Herlihy ◽  
T S Samy ◽  
K S Hahm ◽  
H Maeda ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Primary Structure ◽  
Fast Atom Bombardment ◽  
Chromatographic Mass

scholarly journals Assignment of disulfide bonds in proteins by fast atom bombardment mass spectrometry.

1987 ◽  
Vol 262 (6) ◽  
pp. 2507-2513
Author(s):  
R. Yazdanparast ◽  
P.C. Andrews ◽  
D.L. Smith ◽  
J.E. Dixon
Keyword(s):  
Mass Spectrometry ◽  
Disulfide Bonds ◽  
Fast Atom Bombardment
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