<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>This paper presents the results of a study aimed at developing the extraction process and determining long-term stability of (E)-azastilbene derivatives in order to explore their possible use as preservative, antiseptic and disinfectant substances. The study was performed in three different matrices: distilled, surface and waste water. Test substances included bromide of (E)-N-(o-bro-mobenzyl)-4′-hydroxystilbazole-4 and chloride of (E)-N-(p-chlorobenzyl)-4′-hydroxystilbazole-4. The extraction process involved the use of three stationary phases: octyl, octadecyl and naphthylpropyl. The highest recovery values (amounting to approx. 95%) were obtained in the naphthylpropyl column for all of the above-mentioned matrices. A decline in the stability of the analysed derivatives after a 28-day period was below 14% in all matrix types.</p></abstract>

This paper presents the results of a study aimed at developing the extraction process and determining long-term stability of (E)-azastilbene derivatives in order to explore their possible use as preservative, antiseptic and disinfectant substances. The study was performed in three different matrices: distilled, surface and waste water. Test substances included bromide of (E)-N-(o-bro-mobenzyl)-4′-hydroxystilbazole-4 and chloride of (E)-N-(p-chlorobenzyl)-4′-hydroxystilbazole-4. The extraction process involved the use of three stationary phases: octyl, octadecyl and naphthylpropyl. The highest recovery values (amounting to approx. 95%) were obtained in the naphthylpropyl column for all of the above-mentioned matrices. A decline in the stability of the analysed derivatives after a 28-day period was below 14% in all matrix types.

A new method for isolating (E)-azastilbene derivatives with antimicrobial properties from aqueous samples

Siedlce University of Natural Sciences and Humanities

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This paper presents the results of a study aimed at developing the extraction process and determining long-term stability of (E)-azastilbene derivatives in...

Compound	Concentration range (μg ml⁻¹)	Linear regression equation	R²	LOD (μg ml⁻¹)	LOQ (μg ml⁻¹)
(Al)	5–300	y = 0.5060x + 0.0499	0.9999	0.152	0.457
(A2)	5–300	y = 0.4998x + 0.0421	0.9999	0.149	0.473

Compound	M.p. °C	IR (KBr) (cm⁻¹) δ_CH=CH	¹H-NMR δ(ppm) -ch_2^-+N
(A1)	217–220	981	5.91
(A2)	240–243	986	5.82

A new method for isolating (E)-azastilbene derivatives with antimicrobial properties from aqueous samples

Article Category: Original research paper

Publié en ligne: 13 mars 2018

Pages: 19 - 26

Reçu: 13 juil. 2017

Accepté: 08 sept. 2017

DOI: https://doi.org/10.1515/ohs-2018-0003

© 2018 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Concentration range of analytical compounds at which calibration curves are linear, and sensitivity of the HPLC method

Chemical and physical data of the analysed compounds