Multi-mycotoxin analysis in complex biological matrices using LC-ESI/MS: experimental study using triple stage quadrupole and LTQ-Orbitrap.
J Sep Sci
; 32(7): 939-48, 2009 Apr.
Article
en En
| MEDLINE
| ID: mdl-19224629
ABSTRACT
In the present study, we report the application of LC-MS based on two different LC-MS systems to mycotoxin analysis. The mycotoxins were extracted with an ACN/water/acetic acid mixture and directly injected into a LC-MS/MS system without any dilution procedure. First, a sensitive and reliable HPLC-ESI-MS/MS method using selected reaction monitoring on a triple quadrupole mass spectrometer (TSQ Quantum Ultra AM) has been developed for determining 32 mycotoxins in crude extracts of wheat and maize. This method was operated both in positive and in negative ionization modes in two separate chromatographic runs. The method was validated by studies of spiked recoveries, linearity, matrix effect, intra-assay precision and sensitivity. Further, we have developed and evaluated a method based on accurate mass measurements of extracted target ions in full scan mode using micro-LC-LTQ-Orbitrap as a tool for fast quantitative analysis. Both instruments exhibited very high sensitivity and repeatability in positive ionization mode. Coupling of micro-LC to Orbitrap technology was not applicable to the negatively ionizable compounds. The LC triple quadrupole MS method has proved to be stable in quantitation, as it is with respect to the matrix effects of grain samples.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Cromatografía Líquida de Alta Presión
/
Espectrometría de Masa por Ionización de Electrospray
/
Micotoxinas
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J Sep Sci
Año:
2009
Tipo del documento:
Article
País de afiliación:
Alemania