1.
J Chromatogr A
; 985(1-2): 313-9, 2003 Jan 24.
Article
in English
| MEDLINE
| ID: mdl-12580499
ABSTRACT
The direct determination by GC-MS analysis of the products from the limonene disproportionation obtained from the catalytic hydrogenation of castor oil is not possible since a transesterification of the oil is required before injection. Therefore, a method for the determination of those products is proposed here: a solid-phase microextraction (SPME) followed by GC-MS. With the optimization of SPME it was possible to isolate a great number of products of the disproportionation of limonene used as hydrogen donor in the catalytic hydrogenation of castor oil by Pd/C. This system also proved to be appropriate to monitor castor oil hydrogenation by following and identifying the limonene disproportionated products.
Subject(s)
Castor Oil/chemistry , Terpenes/chemistry , Catalysis , Cyclohexenes , Esterification , Gas Chromatography-Mass Spectrometry/methods , Limonene
2.
Mem Inst Oswaldo Cruz
; 91(5): 561-2, 1996.
Article
in English
| MEDLINE
| ID: mdl-9137742