Identification of toxic oligopeptides in Amanita fungi employing capillary electrophoresis-electrospray ionization-mass spectrometry with positive and negative ion detection

Electrophoresis
Jan RittgenUte Pyell

Abstract

The identification of toxic oligopeptides employing CE-ESI-MS is presented. The analytes studied ama- and phallotoxins are of significant forensic interest because over 90% of the lethal cases of fungus poisoning in man are caused by species of Amanita which contain these toxins. A CE method was developed to separate the toxins alpha-, beta- and gamma-amanitin, phalloidin and phallacidin. Their fragmentation patterns in MS(n) experiments were investigated in the positive and in the negative ion mode, also the influence of the sheath liquid mixture of the used interface on the S/N. Method validation included the determination of the LOD and the repeatability of the migration time and peak area for both detection modes. With the optimized method LODs of 13-79 ng/mL (17-87 nmol/L) were reached. The CE-MS procedure was successfully applied to the identification of ama- and phallotoxins in extracts of air-dried mushroom samples.

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Citations

Oct 20, 2009·Analytical and Bioanalytical Chemistry·C HuhnG W Somsen
Sep 17, 2015·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Juliana GarciaFélix Carvalho
Apr 21, 2009·Electrophoresis·Virginia Rodríguez Robledo, William Franklin Smyth
Oct 31, 2009·Journal of Separation Science·María Asensio-RamosSalvatore Fanali
Apr 11, 2009·Electrophoresis·Lidia M Ravelo-PérezMiguel Angel Rodríguez-Delgado
Dec 8, 2011·Electrophoresis·Heide R RabanesJoselito P Quirino
Aug 14, 2012·Proteomics·Shuai Sherry ZhaoDavid D Y Chen
Dec 2, 2009·Electrophoresis·Franco TagliaroFederica Bortolotti
Dec 2, 2009·Electrophoresis·Václav Kasicka
Feb 18, 2014·Forensic Science International. Genetics·Christian GaustererThomas Stimpfl

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