摘要:

AbstractMultidimensional gas chromatography (MDGC) employing heart‐cutting from a Carbowax 20M coated precolumn onto a heptakis (2, 3, 6‐tri‐O‐methyl)‐β‐cyclodextrin coated chiral main column allows the direct stereodifferentiation of α‐pinene, β‐pinene and limonene from complex matrices. Commercially available essential oils of Rutaceae and Gramineae, as well as self‐prepared peel extracts of Rutaceae were directly analysed without any further clean‐up. The enantiomeric distribution of the monoterpenes from the essential oils and the peel ext

ISSN:0882-5734    

DOI:10.1002/ffj.2730050402

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe enantiomers of α‐pinene, β‐pinene and limonene were directly determined in complex matrices by multidimensional gas chromatography using a non‐chiral‐chiral column combination.Essential oils, used for the preparation of perfumes and cosmetics, and commercially available perfumery products were analysed without sample clean‐up. The enantiomeric distribution of the monoterpenes investigated allows a quality control of perfumes, a validation of essential oils as well as a differentiation of their natural or artifi

ISSN:0882-5734    

DOI:10.1002/ffj.2730050403

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe volatile fraction of ‘Mapo’ tangelo essential oil was studied using chromatography on a neutral alumina column and gas chromatography with a SE 52 capillary column. Its composition has been compared with that of the essential oils of mandarin and grapefruit.The olfactory characteristics and the composition of the essential oil are in relation to the origin of tangelo which was obtained in Sicily by crossbreeding mandarin with grapefr

ISSN:0882-5734    

DOI:10.1002/ffj.2730050404

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractMentha×verticillataclone 7303 (38% menthofuran, 20% menthol, 9% limonene) was crossed toMentha spicataL. (40–50% carvone). This cross produced a PO–F1population particularly rich in piperitenone oxide (62%). Backcrosses of the PO–F1hybrids to theM. spicataparent produced a ratio of 1:3 carvone‐odoured to non carvone‐odoured individuals; 1:3 piperitenone oxide‐odoured to non piperitenone oxide‐odoured individuals; 1:7 ratio of sesquiterpene‐odoured to non sesquiterpene‐odoured individuals and a 1:15 ratio of pulegone‐odoured to non pulegone‐odoured individuals, suggesting for the PO–F1hybrid the genotype ‘ii, lmlm, cc, cc, ArAr, PrPr, PsPs, Psps, RrRr, rsrs, oo, oo, EE’. The sesquiterpene individuals almost

ISSN:0882-5734    

DOI:10.1002/ffj.2730050405

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe chemical composition of the volatile flower oil ofRosa rugosaThunb. var.plenaRegal growing in central China was examined by a combination of chemical separation, column chromatography, GC and GC–MS techniques.A total of 108 compounds were identified. This rose essential oil was high in citronellol (60.0%), geraniol (8.6%), nerol (2.8%), citronellyl acetate (2.7%),E, E‐farnesol (2.4%) and tridecan‐2‐one (2.3%), accounting for 78.8%

ISSN:0882-5734    

DOI:10.1002/ffj.2730050406

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractThe level of ( + )‐ α‐santalol (1) and ( − )‐ β‐santalol(Z) (2) measured by capillary gas chromatography (CGC) constitutes a better criterion than the currently accepted index, viz. ‘not less than 90% of alcohol calculated as santalol’ to judge East Indian sandalwood oil. The limits proposed are: 40% to 55% (1) and 17% to 27% (2). This novel approach deserves inclusion in all official specificat

ISSN:0882-5734    

DOI:10.1002/ffj.2730050407

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

AbstractA comparative study of someThymusandThymbraspecies growing wild in Yugoslavia, was carried out in order to determine the possibilities of using regional resources of medicinal plants. The essential oil contents (0.70–1.60% vol./dry wt) were determined by hydrodistillation, and the oil compositions analysed by gas chromatography.The oil ofThymus glabrescensWilld. contained 29% 1, 8‐cineole, 0.2% thymol and 2% carvacrol. Oil samples ofThymus pulegioidesL. contained less than 0.7% 1, 8‐cineole, but 6–15%p‐cymene, 1–22% thymol and 10–30% carvacrol, while one of these samples consisted of 50% linalol. In the oil ofThymus longicaulisC. Presl, the main components werep‐cymene (26%), thymol (40%) and carvacrol (8%). The oil ofThymbra capitata(L.) Cav. [ =Coridothymus capitatus(L.) Rchb. f.] was characterized by large amounts of car

ISSN:0882-5734    

DOI:10.1002/ffj.2730050408

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

摘要:

Abstractα‐Phellandrene is widely distributed in spices and herbs. In the essential oils, the (−)‐form appears more commonly inMentha, Pinus, LavandulaandZanthoxylumspecies.1.2The (+)‐form of α‐phellandrene is most significant inRidolfaspecies,2and has been recently associated in the dill herb3with a strong and typical dill‐like aromatic note. In order to clarify, and to confirm by synthesis, the odour characteristics related to the stereochemical properties of the (+)‐form, it was necessary to provide the pure enantiomer with the known absolut

ISSN:0882-5734    

DOI:10.1002/ffj.2730050409

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

ISSN:0882-5734    

DOI:10.1002/ffj.2730050410

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY

ISSN:0882-5734    

DOI:10.1002/ffj.2730050411

出版商:John Wiley&Sons, Ltd.    

年代:1990

数据来源: WILEY