Determination of Sibiromycin (cas 12684-33-2) and its natural derivatives using new analytical and structural approaches

Add time:08/23/2019    Source:sciencedirect.com

A new separation and quantification method using ultra high-performance liquid chromatography (UHPLC) with UV detection was developed for the detection of Sibiromycin (cas 12684-33-2) in fermentation broth of Streptosporangium sibiricum. The solid phase extraction method based on cation-exchange was employed to pre-concentrate and purify fermentation broth containing sibiromycin prior to UHPLC analysis. The whole assay was validated and showed a linear range of detector response for the quantification of sibiromycin in a concentration from 3.9 to 250.0 μg mL−1, with correlation coefficient of 0.999 and recoveries ranging from 71.66 ± 3.55% to 74.76 ± 5.18%. Method limit of quantification of the assay was determined as 0.18 μg mL−1 and was verified with resulting RSD of 9.6% and accuracy of 97.6%. The developed assay was used to determine the sibiromycin production in 12 different fermentation broths. Moreover, several natural sibiromycin analogues/derivatives were described with pilot characterization using off-line mass spectrometry: the previously described dihydro-sibiromycin (DH-sibiromycin) and tentative bis-glycosyl forms of sibiromycin and its dihydro-analogue.

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