Thermospray high-performance liquid chromatographic mass spectral analyses of the photoproducts of dTpdT and dTpdU

1992 ◽  
Vol 21 (5) ◽  
pp. 259-266 ◽  
Author(s):  
René Bérubé ◽  
Danielle G. E. Lemaire ◽  
Bé La P. Ruzsicska
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Spectral Analyses ◽  
Mass Spectral ◽  
Liquid Chromatographic ◽  
Chromatographic Mass

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.

High performance liquid chromatographic-mass spectrometric assay for the quantitation of BMS-204352 in dog K3EDTA plasma

2002 ◽  
Vol 16 (3) ◽  
pp. 175-182 ◽  
Author(s):  
Ming Yao ◽  
Subbarao Mantha ◽  
Vinod R. Shah ◽  
Nimish N. Vachharajani ◽  
Mark E. Arnold ◽  
...  
Keyword(s):  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Mass Spectrometric ◽  
Liquid Chromatographic ◽  
Chromatographic Mass

On the Nature of the So-Called Methoxychelidonine

1994 ◽  
Vol 59 (2) ◽  
pp. 429-434 ◽  
Author(s):  
Jiří Slavík ◽  
Eva Táborská ◽  
Hana Bochořáková
Keyword(s):  
High Resolution ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Individual Compound ◽  
Chelidonium Majus ◽  
Mass Spectral ◽  
Hplc Technique ◽  
Liquid Chromatographic ◽  
Hplc Analyses ◽  
Resolution Mass

The so-called methoxychelidonine, an alkaloid isolated in 1924 from Chelidonium majus L. (Papaveraceae), is not an individual compound, but a mixture of three related alkaloids (+)-chelamine (III), (+)-homochelidonine (V) and (+)-chelamidine (IV) as it was deduced from high resolution mass spectral, thin-layer chromatographic and high-performance liquid chromatographic (HPLC) analyses of the authentic Gadamer's sample. The content of III, V and IV in "methoxychelidonine" found by HPLC technique was 67, 28, and 5 wt.%, respectively.

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