Determination of alliin and allicin in the plant of Allium scorodoprasum L. subsp. rotundum by using the infrared spectroscopy technique

In this study, alliin and allicin have been investigated in the leaf and bulb parts of Allium scorodoprosum L. subsp. rotundum by the Fourier transform infrared (FTIR) spectroscopy.
The plant samples were obtained from three different locations in Amasya where naturally grows.
Different spectra have been obtained from the plantRSQUOs leaf and bulb parts.
The obtained peaks and their groups can be assigned like this; in the spectrum of the bulb part of the plant; 1^st peak (3285.35 cm^-1) belongs to (CH=CH₂) group of allyl, 2^nd peak (2950.9 cm^-1) belongs to group of aliphatic CH, 3^rd peak (1638.15 cm^-1) belongs to C=C, 4^th peak (1032 cm^-1) belongs to S=O, 6^th peak (891.88 cm^-1) belongs to C-S, and 7^th peak (707.45 cm^-1) belongs to S-S single bond.
In the spectrum of the leaf part of the plant,1^st peak (3372.57 cm^-1) belongs to OH group in the group of (COOH), 2^nd peak (2916.72-2848.93 cm^-1, doublet) belongs to the group of NH₂, 3^rd peak (1734.36 cm^-1) belongs to C=O group in the group of (COOH), 4^th peak (1638.04 cm^-1) belongs to C=C double bond in the group of allyl, 5^th peak (1172.24 
cm^-1) belongs to C-O single bond, 6^th peak (1100.5 cm ^-1) belongs to C-N, 7^th peak (1011.15 cm^-1) belongs to S=O bond, and 8^th peak (958.4 cm^-1) belongs to C-S single bond.
When the peak giving parts of the functional groups in the structural formulas of allicin and alliin are analysed, the existence of both compounds are observed as a result of the spectral measurement.
In the leaf part of plant, alliin was the main component because of the NH₂ double peaks while in the bulb part of plant, allicin was the main component.

VII International Symposium on Edible Alliaceae

B. Tasci, H. Kutuk, I. Koca

allicin, alliin, Allium, IR

https://doi.org/10.17660/ActaHortic.2016.1143.19