INQUISUR 21779
INSTITUTO DE QUIMICA DEL SUR
Unidad Ejecutora - UE
artículos
Título:
Headspace-Mass Spectrometry with Alternative ChromatographicSeparation Using a Column Switching System for the Screening andDetermination of BTEX and Styrene in Comestible Oil
Autor/es:
CARLA TOLEDO; ENRÍQUEZ PEDRO ; GARRIDO MARIANO; FERNÁNDEZ BAND BEATRIZ; PABLO RICHTER
Revista:
ANALYTICAL LETTERS
Editorial:
TAYLOR & FRANCIS INC
Referencias:
Año: 2010 vol. 43 p. 843 - 850
ISSN:
0003-2719
Resumen:
A headspacemass spectrometry with alternative chromatographic separation using a
column switching system was developed for the screening and confirmation of BTEX and
styrene in comestible oils. According to the position of the switching valve, the chromatographic
column can be bypassed and the volatile sample constituents are transferred directly
from the headspace sampler to the mass spectrometer providing a global, non resolved, signal
in less than 1 min after injection. In this way, a set of samples can be rapidly processed in
order to determine if they are (or not) contaminated with BTEX and styrene. Subsequently,
only the samples with positive response in the previous screening can be processed by gas
chromatographymass spectrometry in the same analytical system by switching the position
of the valve, thus confirming the presence of the analytes in the sample.
The method presents good analytical features and it is applicable to the analysis of
real samples. Detection limits were lower than 0.1 ngmL1, and recoveries were between 97
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
1, and recoveries were between 97
and 105% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
% with relative standard deviations lower than 4%.
Analysis of real comestible oils showed the presence of toluene, benzene, and styrene
in some samples packed in plastic bottles.
