US EPA

1453320 

Journal Article 

Analysis of Enantiomeric Glycidyl Fatty Acid Esters by Chiral-phase HPLC/MS with Atmospheric Pressure Chemical Ionization 

Yoshioka, S; Nishimura, K; Takamura, T; Suzui, M; Tsuda, H; Itabashi, Y 

2012 

1 

Bunseki Kagaku / Analysis Chemistry
ISSN: 0525-1931 

61 

9 

783-790 

WOS:000309332900005 

A simple device has been developed to deposit elemental lithium onto plasma facing components in the National Spherical Torus Experiment. Deposition is accomplished by dropping lithium powder into the plasma column. Once introduced, lithium particles quickly become entrained in scrape-off layer flow as an evaporating aerosol. Particles are delivered through a small central aperture in a computer-controlled resonating piezoelectric disk on which the powder is supported. The device has been used to deposit lithium both during discharges as well as prior to plasma breakdown. Clear improvements to plasma performance have been demonstrated. The use of this apparatus provides flexibility in the amount and timing of lithium deposition and, therefore, may benefit future fusion research devices. (C) 2010 Elsevier B.V. All rights reserved. 

glycidyl fatty acid ester; enantiomer; diacylglycerol-rich oil; chiral-phase HPLC; atmospheric pressure chemical ionization mass spectrometry