Mitigation of signal suppression caused by the use of trifluoroacetic acid in liquid chromatography mobile phases during liquid chromatography/mass spectrometry analysis via post-column addition of ammonium hydroxide

2012 ◽  
Vol 26 (12) ◽  
pp. 1507-1514 ◽  
Author(s):  
Chang-Ching Chan ◽  
Mark S. Bolgar ◽  
Dilusha Dalpathado ◽  
David K. Lloyd
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Trifluoroacetic Acid ◽  
Ammonium Hydroxide ◽  
Mass Spectrometry Analysis ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatography Mass Spectrometry ◽  
Signal Suppression ◽  
Mobile Phases

scholarly journals Liquid chromatography–mass spectrometry analysis of dyes formed by in situ oxidative methods then purified by absorption and extraction from hair wefts

2020 ◽  
pp. 174751982097862
Author(s):  
M John Plater ◽  
Andrea Raab
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Complex Mixture ◽  
Ammonium Salts ◽  
Mass Spectrometry Analysis ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatography Mass Spectrometry ◽  
Didecyldimethylammonium Chloride

The dye mixtures formed from three commercial hair colour formers were purified by absorption onto human hair wefts, washed and dried, extracted with dichloromethane:trifluoroacetic acid (75:25) and then analysed by liquid chromatography–mass spectrometry. Only 1–2 dyes were identified from each complex mixture of commercial aromatic amines along with a broad UV absorption mainly consisting of mixtures of quaternary ammonium salts from shampoos and some surfactants. Mecetronium ethyl sulfate and didecyldimethylammonium chloride were the main ammonium salts.

scholarly journals LIQUID CHROMATOGRAPHY–MASS SPECTROMETRY ANALYSIS OF FRUITS OF AN ECONOMICALLY IMPORTANT PLANT SCHISANDRA CHINENSIS BAIL. FROM CHINA AND EAST RUSSIA

2018 ◽  
Vol 11 (9) ◽  
pp. 65
Author(s):  
Luferov An ◽  
Kartashova Nv ◽  
Strelyaeva Av ◽  
Kuznetcov Rm
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Mass Spectra ◽  
Mass Spectrometry Analysis ◽  
Schisandra Chinensis ◽  
Liquid Chromatography Mass Spectrometry ◽  
Spectrometry Analysis ◽  
Chromatography Mass Spectrometry ◽  
East Russia ◽  
Phytochemical Constituents

Objective: The study was carried out with an objective to characterize the possible bioactive phytochemical constituents from fruits of Schisandra chinensis Bail. by liquid chromatography–mass spectrometry analysis.Methods: Plant material was collected from Schisandra chinensis during August–October. The dried plant fruits were extracted with solvents using ethanol 95% extractor. The results of chromatography–MS analysis performed on the instrument Agilent Technologies established the presence of major and minor components. It was conducted a qualitative and quantitative comparison of infusions using software ChemStationE 02.00 and full library of mass spectra NIST 05.

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