Calling all Organic Chemists: HELP!!

Bubafat · 10-06-2001, 06:49 PM

Hey all,

I'm having a beast of a time analyzing a C13 NMR of an oil isolated from Cumin seed. I know the major product was cuminalyhyde but there are many other bands on the CNMR that suggest contaminants and I can't figure out any online sources that will tell me what other essecial oils are found in cumin seeds. If anyone knows, I'd be much appreciative.

Thanks.

Buba

**Ninong** · 10-06-2001, 07:47 PM

Hmmm... I entered "cumin seed essential oils" in my search engine and up popped the following:

"The odor and flavor of cumin is derived largely from the essential oil, which contains cuminaldehyde as the main constituent. Other ingredients of the oil are dihydrocuminaldehyde, d,1-pinene, d--pinene, para-cymene, -pinene, dipentene, and cuminyl alcohol (14.1-7). Synthetic cuminaldehyde is an adulterant to cumin oil and is very difficult to detect chemically. The dried seed of cumin has 2.5 to 5 percent essential oil on a dry weight basis and is obtained by steam distillation. The characteristic odor of cumin is caused primarily by aldehydes that are present in the oil (6.4-114)." http://newcrop.hort.purdue.edu/newcr...ets/CUMIN.html

Also search under Cuminum cyminum and Cuminum odorum. Here are 1,314 hits under Cuminum cyminum: http://search.msn.com/results.asp?q=...cfg=SMCINITIAL

Ninong

10-06-2001, 06:49 PM	#1
Bubafat Tenant Join Date: May 2001 Location: MN: To damn cold to reef here Posts: 52	Calling all Organic Chemists: HELP!! Hey all, I'm having a beast of a time analyzing a C13 NMR of an oil isolated from Cumin seed. I know the major product was cuminalyhyde but there are many other bands on the CNMR that suggest contaminants and I can't figure out any online sources that will tell me what other essecial oils are found in cumin seeds. If anyone knows, I'd be much appreciative. Thanks. Buba

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10-06-2001, 07:47 PM	#2
Ninong Moderator Join Date: Jun 2000 Location: Louisiana Posts: 20,336	Hmmm... I entered "cumin seed essential oils" in my search engine and up popped the following: "The odor and flavor of cumin is derived largely from the essential oil, which contains cuminaldehyde as the main constituent. Other ingredients of the oil are dihydrocuminaldehyde, d,1-pinene, d--pinene, para-cymene, -pinene, dipentene, and cuminyl alcohol (14.1-7). Synthetic cuminaldehyde is an adulterant to cumin oil and is very difficult to detect chemically. The dried seed of cumin has 2.5 to 5 percent essential oil on a dry weight basis and is obtained by steam distillation. The characteristic odor of cumin is caused primarily by aldehydes that are present in the oil (6.4-114)." http://newcrop.hort.purdue.edu/newcr...ets/CUMIN.html Also search under Cuminum cyminum and Cuminum odorum. Here are 1,314 hits under Cuminum cyminum: http://search.msn.com/results.asp?q=...cfg=SMCINITIAL Ninong

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