HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC SEPARATION OF VITAMIN D3 3-FATTY ACID ESTERS AND THEIR LIQUID CHROMATOGRAPHY/MASS SPECTROMETRY

1999 ◽  
Vol 22 (3) ◽  
pp. 367-377 ◽  
Author(s):  
K. Mitamura ◽  
Y. Nambu ◽  
M. Tanaka ◽  
A. Kawanishi ◽  
J. Kitahori ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Fatty Acid ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Fatty Acid Esters ◽  
Liquid Chromatography Mass Spectrometry ◽  
Liquid Chromatographic Separation ◽  
Liquid Chromatographic ◽  
Acid Esters

Gas Chromatographic and Gas Chromatographic-Mass Spectrometric Confirmation of 2,4- and 2,6-Toluenediamine Determined by Liquid Chromatography in Aqueous Extracts

1982 ◽  
Vol 65 (6) ◽  
pp. 1388-1394 ◽  
Author(s):  
Roger C Snyder ◽  
William C Brumley ◽  
Charles V Breder ◽  
Thomas Fazio
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Mass Spectrometric ◽  
Gas Liquid Chromatography ◽  
Aqueous Extracts ◽  
Chromatographic Procedure ◽  
Liquid Chromatographic ◽  
Chromatographic Mass

Abstract The confirmation of 2,4- and 2,6-toluenediamine (TDA) in aqueous extracts from boil-in-bags and retortable pouches is described. The extracts were initially analyzed by a high performance liquid chromatographic procedure and any apparent 2,4- and/or 2,6-TDA were quantitated. The liquid chromatographic effluent corresponding to any apparent 2,4- or 2,6-TDA was collected. TDA was then partitioned into ethyl acetate and reacted with trifluoroacetic anhydride (TFAA). The TDA-TFAA derivative formed was confirmed by gas-liquid chromatography (GLC) using a 1.2 m × 0.32 cm nickel column packed with 6% OV-17 on Superpak-20M. Results obtained from analyzing extracts of several retortable pouches and boil-in-bags showed levels of TDA migration ranging from <0.1 to 2.2 ppb (μg/L). Additional confirmation of the TDA-TFAA derivative from retortable pouches by multiple ion detection GC/mass spectrometry is also described.

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