A comparison study of nanofiber, microfiber, and new composite nano/microfiber polymers used as sorbents for on-line solid phase extraction in chromatography system

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dc.contributor.author Hakova Martina cs
dc.contributor.author Chocholousova Havlikova Lucie cs
dc.contributor.author Chvojka Jiří cs
dc.contributor.author Erben Jakub cs
dc.contributor.author Solich Petr cs
dc.contributor.author Švec František cs
dc.date.accessioned 2018-09-25T12:19:48Z
dc.date.available 2018-09-25T12:19:48Z
dc.date.issued 2018 cs
dc.identifier.issn 0003-2670 cs
dc.identifier.uri https://dspace.tul.cz/handle/15240/32013
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S000326701830504X?via=ihub
dc.description.abstract Three different approaches has been used to obtain nano/micro fibers and their diversity and extraction properties were examined. The effect of their structure on stability in an ultra-high-performance liquid chromatography (UHPLC) system during on-line SPE procedure was monitored. Five types of various nano/micro fiber polymers were used as sorbents: polyamide 6 nanofibers, polyvinylidene difluoride nanofibers, polyethylene microfibers, and two new polycaprolactone microfiber/nanofiber and polycaprolactone microfibers/polyvinylidene difluoride nanofibers composite polymers. The fiber polymers were filled in a cartridge directly connected to the UHPLC system and tested. For each polymer, the optimal conditions of the on-line extraction were found and potential applicability on real samples was tested. The determination of ochratoxin A (OTA) in beer matrix was chosen as a case study. Relevant factors such as the mechanical and chemical stability of the nano/microfibers, filling the cartridges, fiber reusability and the possibility and the repeatability of all processes were involved in the proposed study. A new nano/micro composite sorbent consisting of polycaprolactone microfibers/polyvinylidene difluoride nanofibers was chosen as the most suitable sorbent for the on-line extraction of OTA from a beer matrix. The tested validation parameters had the value of intra-day precision lower than 1.48%, linearity in the range from 0.5 to 100 μg L−1 with r2 ≥ 0.9999 for standard and matrix calibration curve, and recovery in the range 99.1–103.9% at five concentration levels. Long-term precision evaluated for 31 analyses over the period of three months did not exceed 2.9% RSD. It confirmed the column reusability and perfect stability of nano/micro composite sorbent in the presence of organic solvents and after repeated injection of a complex beer matrix. en
dc.format.extent 9 cs
dc.language.iso eng cs
dc.publisher Elsevier Ltd. cs
dc.relation.ispartofseries 1 cs
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S000326701830504X?via=ihub cs
dc.subject Polyamide 6 cs
dc.subject Polyvinylidene difluoride cs
dc.subject Polycaprolactone cs
dc.subject Polyethylene nanofibers cs
dc.subject On-line extraction cs
dc.subject Ochratoxin A cs
dc.title A comparison study of nanofiber, microfiber, and new composite nano/microfiber polymers used as sorbents for on-line solid phase extraction in chromatography system cs
dc.identifier.doi https://doi.org/10.1016/j.aca.2018.04.023
local.relation.issue SEP 6 2018 cs
local.identifier.wok 000432351500005 en
local.citation.spage 44-52 cs
local.citation.epage 44-52 cs
local.identifier.publikace 5484
dc.rights.SHERPA/RoMEO Analytica Chimica Acta (ISSN: 0003-2670, ESSN: 1873-4324), author cannot archive publisher's version/PDF


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