A rapid multidimensional liquid-gas chromatography method for the analysis of mineral oil saturated hydrocarbons in vegetable oils.
J Chromatogr A
; 1218(42): 7476-80, 2011 Oct 21.
Article
em En
| MEDLINE
| ID: mdl-21774942
ABSTRACT
The present paper describes an investigation directed toward the development of a rapid heart-cutting LC-GC method for the analysis of mineral oil saturated hydrocarbons contained in vegetable oils. The automated LC-GC experiments were carried out by using a system equipped with a syringe-type interface, capable of both heart-cutting and comprehensive (LC × GC) two-dimensional analysis. The first dimension separation was achieved on a 100 mm × 3 mm ID × 5 µm d(p) silica column, operated under isocratic conditions (hexane). A single 30-s cut, corresponding to a 175 µL volume, was transferred to a programmed temperature vaporizer. After the large volume injection, the target analytes were separated in a rapid manner (~9 min) using a 15 m × 0.1mm ID × 0.1 µm micro-bore GC capillary. The overall LC-GC run time enables the analysis of ca. 4 samples/hour. Quantification was performed by using external calibration, in the 1-200 mg/kg range. The method was validated in terms of linearity, precision, limits of detection and quantification, and accuracy. A series of commercial samples were subjected to analysis. Various degrees of contamination were found in all samples, in the 7.6-180.6 mg/kg range.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óleos de Plantas
/
Óleo Mineral
/
Cromatografia Gasosa
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Idioma:
En
Revista:
J Chromatogr A
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Itália