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Abstract
A Study of the Botanical Origin and Essential Oil Components of the Herb Phak Chee La
Sirirat Pukphaknham, Tanit Padumanonda
Faculty of Pharmacy, Khon Kaen University
Phak chee la is a crude drug commonly used in Thai traditional herbal remedies. Fruits of phak chee la
are used as an antiflatulent, mineral supplement, thirst quencher, anti-nausea/vomiting and treatment for
sore eye. Despite its availability in Thai herbal drugstores, the botanical identity and the official scientific
name of phak chee la is still unclear. There is also no obvious definition of the name “phak chee la” and there
are several plants called “phak chee” in Thailand, such as phak chee Lao, phak chee loom, and phak chee jean.
To reveal its botanical origin, the crude drug was traced back from herbal dispensaries in Bangkok to its
natural habitats in combination with the information gathered from interviews with traditional healers and
the data from intensive literature reviews. Fruits of phak chee la were purchased from several herbal dispen-
saries in Bangkok and Chiang Mai. Evaluation of crude drugs was conducted according to Thai Herbal
Pharmacopeia guidelines as well as the determination of the chemical content of essential oils made from phak
chee la fruits. According to the studies, the content of foreign matter, acid-insoluble ash, total ash and mois-
ture was determined; the amounts were as follows: 0.07 ±± ±± ± 0.01, 0.003 ±± ±± ± 0.001, 7.25 ±± ±± ± 0.40 and 1.93 ±± ±± ± 0.28%,
whereas the ethanol-soluble extractive, and water-soluble extractive were determined to be 4.42 ±± ±± ± 0.03, 3.28 ±± ±± ±
0.22%, respectively. The major components in the oil extracted from the fruits of phak chee la were linalool,
camphor, gamma-terpinene and alpha-pinene. The overall chemistry study in combination with the informa-
tion obtained in the interviews and literature reviews supported the botanical origin of the crude drug phak
che la to be Coriandrum sativum L. However, further studies on such aspects as plant genetics and chemistry
are necessary for confirmation.
Key words: phak chee la, botanical origin