Improved Method for Extraction and LC-MS Analysis of Pyrrolizidine Alkaloids and TheirN-Oxides in Honey:  Application toEchium vulgareHoneys

2005 ◽  
Vol 53 (6) ◽  
pp. 1894-1902 ◽  
Author(s):  
Keith Betteridge ◽  
Yu Cao ◽  
Steven M. Colegate
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Improved Method ◽  
Ms Analysis

scholarly journals Improved Method for Isolation of Lycopsamine from Roots of Comfrey (Symphytum officinale)

2012 ◽  
Vol 7 (7) ◽  
pp. 1934578X1200700
Author(s):  
Damjan Janeš ◽  
Boštjan Kalamar ◽  
Samo Kreft
Keyword(s):  
High Performance ◽  
Pyrrolizidine Alkaloids ◽  
Ion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Improved Method ◽  
Isolation And Purification ◽  
H Nmr ◽  
Symphytum Officinale ◽  
Layer Chromatography ◽  
Preparative Layer Chromatography

An improved method for the isolation and purification of pyrrolizidine alkaloids from comfrey ( Symphytum officinale L.) roots was developed, introducing very fast, selective and ion residue-free reduction of N-oxides followed by ion-exchange chromatography giving a non-aqueous solution of alkaloids, from which solvents can be easily removed. With this procedure the use of large volumes of organic solvents, very slow reduction of N-oxides and input of additional impurities was avoided. Lycopsamine, which proved to be the major alkaloid, was additionally purified by preparative layer chromatography (PLC) and high performance liquid chromatography (HPLC). The identity of the alkaloid was confirmed by 1H NMR spectroscopy and mass spectrometry.

scholarly journals Pyrrolizidine alkaloids from Bulgarian species of the genus Senecio

2006 ◽  
Vol 71 (12) ◽  
pp. 1275-1280 ◽  
Author(s):  
Nadezhda Kostova ◽  
Veselin Christov ◽  
Maia Cholakova ◽  
Elena Nikolova ◽  
Liuba Evstatieva
Keyword(s):  
Spectral Data ◽  
Pyrrolizidine Alkaloids ◽  
Immunosuppressive Effect ◽  
Ms Analysis ◽  
Different Types ◽  
First Time

Nine Bulgarian species from the genus Senecio were studied phytochemically and/or by GC-MS analysis. Senecivernine-N-oxide was isolated and identified by spectral data for the first time. Different types of pyrrolizidine alkaloids were tested for cytotoxicity on murine lymphocytes. At a concentration of 100 ?g/ml, the alkaloid retroisosenine showed immunosuppressive effect. .

An Improved Method of UPLC-PDA-MS/MS Analysis of Lycopene Isomers

2015 ◽  
Vol 8 (8) ◽  
pp. 1962-1969 ◽  
Author(s):  
Bangalore Prabhashankar Arathi ◽  
Poorigali Raghavendra Rao Sowmya ◽  
Kariyappa Vijay ◽  
Pullancheri Dilshad ◽  
Bhattacharya Saikat ◽  
...  
Keyword(s):  
Improved Method ◽  
Ms Analysis

An Improved Method for Preparing Dimethyl Disulfide Adducts for GC/MS Analysis

2007 ◽  
Vol 85 (1) ◽  
pp. 93-94 ◽  
Author(s):  
Akira Shibahara ◽  
Kouhei Yamamoto ◽  
Akemi Kinoshita ◽  
Barbara L. Anderson
Keyword(s):  
Dimethyl Disulfide ◽  
Improved Method ◽  
Ms Analysis

scholarly journals Improved Method Supporting Maldi-Ms Analysis of Sialyloligosaccharides Including Their Structural Isomers

2020 ◽  
Vol 118 (3) ◽  
pp. 622a
Author(s):  
Takashi Terabayashi ◽  
Kenji Fukuda ◽  
Minoru Morita ◽  
Tadasu Urashima
Keyword(s):  
Maldi Ms ◽  
Improved Method ◽  
Structural Isomers ◽  
Ms Analysis

scholarly journals Pyrrolizidine alkaloids in bee pollen identified by LC-MS/MS analysis and colour parameters using multivariate class modeling

Heliyon ◽  
2020 ◽  
Vol 6 (3) ◽  
pp. e03593 ◽  
Author(s):  
Luciana De Jesus Inacio ◽  
Roberta Merlanti ◽  
Lorena Lucatello ◽  
Vittoria Bisutti ◽  
Barbara Contiero ◽  
...  
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Bee Pollen ◽  
Ms Analysis ◽  
Colour Parameters

Alkaloid Profile of Bulgarian Species from Genus Senecio L.

2003 ◽  
Vol 58 (3-4) ◽  
pp. 300-302 ◽  
Author(s):  
Veselin Christov ◽  
Liuba Evstatieva
Keyword(s):  
Pyrrolizidine Alkaloids ◽  
Phytochemical Study ◽  
Ms Analysis

Twenty-seven pyrrolizidine alkaloids were identified by a detailed phytochemical study and GC/MS analysis on twelve Bulgarian species from genus Senecio. Twenty of them are new for the corresponding species. Other six structures reimain tentatively identified.

Solid-Phase Extraction and LC−MS Analysis of Pyrrolizidine Alkaloids in Honeys

2004 ◽  
Vol 52 (21) ◽  
pp. 6664-6672 ◽  
Author(s):  
Kerrie A. Beales ◽  
Keith Betteridge ◽  
Steven M. Colegate ◽  
John A. Edgar
Keyword(s):  
Solid Phase Extraction ◽  
Pyrrolizidine Alkaloids ◽  
Solid Phase ◽  
Phase Extraction ◽  
Ms Analysis
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