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In-syringe extraction using dissolvable layered double hydroxide-polymer sponges templated from hierarchically porous coordination polymers


Ghani, M and Frizzarin, RM and Maya, F and Cerda, V, In-syringe extraction using dissolvable layered double hydroxide-polymer sponges templated from hierarchically porous coordination polymers, Journal of Chromatography A, 1453 pp. 1-9. ISSN 0021-9673 (2016) [Refereed Article]

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© 2016 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.chroma.2016.05.023


Herein we report the use of cobalt porous coordination polymers (PCP) as intermediates to prepare advanced extraction media based on layered double hydroxides (LDH) supported on melamine polymer foam. The obtained dissolvable Ni–Co LDH composite sponges can be molded and used as sorbent for the in-syringe solid-phase extraction (SPE) of phenolic acids from fruit juices. The proposed sorbent is obtained due to the surfactant-assisted self-assembly of Co(II)/imidazolate PCPs on commercially available melamine foam, followed by the in situ conversion of the PCP into the final dissolvable LDH coating. Advantageous features for SPE are obtained by using PCPs with hierarchical porosity (HPCPs). The LDH-sponge prepared using intermediate HPCPs (HLDH-sponge) is placed in the headspace of a glass syringe, enabling flow-through extraction followed by analyte elution by the dissolution of the LDH coating in acidic conditions. Three phenolic acids (gallic acid, p-hydroxybenzoic acid and caffeic acid) were extracted and quantified using high performance liquid chromatography. Using a 5 mL sample volume, the obtained detection limits were 0.15–0.35 μg L−1. The proposed method for the preparation of HLDH-sponges showed a good reproducibility as observed from the intra- and inter-day RSD’s, which were <10% for all analytes. The batch-to-batch reproducibility for three different batches of HLDH-sponges was 10.6–11.2%. Enrichment factors of 15–21 were obtained. The HLDH-sponges were applied satisfactorily to the determination of phenolic acids in natural and commercial fruit juices, obtaining relative recoveries among 89.7–95.3%.

Item Details

Item Type:Refereed Article
Keywords:sample preparation, chromatography, layered double hydroxide, porous coordination polymer, hierarchically porous materials, in-syringe extraction, phenolic acids
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Separation science
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Maya, F (Mr Fernando Maya Alejandro)
ID Code:127837
Year Published:2016
Web of Science® Times Cited:16
Deposited By:Chemistry
Deposited On:2018-08-19
Last Modified:2018-09-07

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