This is the first part in the series of ‘The bitter orange tree: bigarade, petitgrain, orange leaf, neroli, and orange blossom’.
Seville, Spain, is famous for its abundance of bitter orange trees (Citrus aurantium subspecies amara) that line the streets. Their prolific blossoms perfume the air in spring. They were brought in the ninth century by the Moors that ruled the south of Spain. The local bitter orange fruits are not directly consumed due to its intense sourness and bitterness, but are prized for their high pectin content — perfect for making marmalade.
The peel is, however, valued for its fragrant essential oils extracted by cold pressing. Bigarade oil is sourced from various places, but especially from Argentina and Ivory Coast. Despite being strongly citrusy, it is remarkably different from sweet orange oil (Citrus sinensis). Bigarade oil is less aldehydic, and possesses a fresh floral and bergamot-like character. Its pronounced bitterness is due to the presence of non-volatile, polar components that also set it apart from sweet orange oil. Certain molecularly distilled quality of bigarade oil provides a more intense fruity, zesty orange note with a balance between aldehydic character and fruity sweetness. Some main constituents are aliphatic aldehydes, oxygen-containing mono- and sesquiterpenes. Aldehyde C-8 to C-14, linalool, linalyl acetate, nootkatone, and α-selinenone could contribute to its odour character.
In perfumes, bigarade oil imparts distinct freshness to the composition, and for instance, is featured in Cologne Bigarade (Frédéric Malle, 2001) with as much as 50% bitter orange oil.
Sources: andalucia.com, Scent and Chemistry, The Molecular World of Odors, parfumo.de
- Ling Zhengkui, Hua Yingfang, and Gu Yuhong, The Chemical Constituents Of the Essential Oil from the Flowers, Leaves and Peels of Citrus Aurantium; in: Proc of the Intl Conf on Ess Oils, Flavours, Fragrances and Cosmetics, 380-381, Beijing, China, 9-13 October (1988).
- Mans H Boelens, Critical Review on the Chemical Composition of Citrus Oils, Perf & Flav, 16(2), 17-34 (1991).
- Mans H Boelens and Rafael Jimenez Sindreu, Essential Oils from Seville Sitter Orange (Citrus aurantium L. ssp. amara L.), BM Lawrence, BD Mookherjee and BJ Wllis (Editors), Flavors and Fragrances: A World Perspective. Proc of the 10th Intl Congr of Ess CMs, Fragrances and Flavors, Washington, DC, Elsevier Sci Publ BV, Amsterdam (1988).
- Mans H Boelens and Rafael Jimenez, The Chemical Composition of the Peel Oils from Unripe and Ripe Fruits of Bitter Orange, Citrus aurantium L ssp amara Engl, Flavour Fragr J, 4, 139-142 (1989).