title: Determination of the disproportionation products of limonene used for the catalytic hydrogenation of castor oil.
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.
authors.affiliation: Universidade de Santa Cruz do Sul (UNISC), Rio Grande do Sul, Brazil.
authors.forename: R C S
authors.initials: RC
authors.lastname: Schneider
authors.forename: V Z
authors.initials: VZ
authors.lastname: Baldissarelli
authors.forename: M
authors.initials: M
authors.lastname: Martinelli
authors.forename: M L A
authors.initials: ML
authors.lastname: von Holleben
authors.forename: E B
authors.initials: EB
authors.lastname: Caramão
mesh_terms: D002368:Castor Oil / Q000737:chemistry*; D002384:Catalysis; D053138:Cyclohexenes; D004951:Esterification; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D000077222:Limonene; D013729:Terpenes / Q000737:chemistry*
chemical_list: D053138:Cyclohexenes; D013729:Terpenes; D002368:Castor Oil; D000077222:Limonene