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Campa, C.* ; Schmitt-Kopplin, P. ; Cataldi, T.R.I.* ; Bufo, S.A.* ; Freitag, D. ; Kettrup, A.

Analysis of cyanogenic glycosides by micellar capillary electrophoresis.

J. Chromatogr. A 739, 95-100 (2000)

Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.

Abstract
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he separation of amygdalin, prunasin and their isomers neoamygdalin and sambunigrin could be achieved with micellar capillary electrophoresis (MEKC). The two isomers were obtained in alkaline conditions and were produced in less than 15 min at pH 11.0. The developed methods showed a good selectivity in the separation of the isomers only in the presence of SDS micelles. The working pH was optimized to allow best resolution and quantitative analysis of these compounds, With a linear calibration over an injection time from 1 to 20 s, the detection limit was found to be in the range of 5 mu M (S/N=3; 20 a injection time). Two pH buffer systems (pH 5.2 and pH 9.1) were chosen to confirm the peak attributions of the compounds in the apple and peach seeds samples. Sambunigrin was found in both apple and peach seeds but could not be quantified because of missing standards. Prunasin and amygdalin were not found in the apple sample, while they were quantified in the peach seeds in concentrations of 50 mu g/g and 90 mu g/g (dry weight), respectively.

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