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Gao Y, Xu M, Zheng Z, Wan Y, Wu S, Li C. Preparation of ZIF-8 and Its Application in Determination of Pyridoxine and Pyridoxal in Ginkgo Seeds by Ultra-Performance Liquid Chromatography. Foods 2022; 11:foods11142014. [PMID: 35885257 PMCID: PMC9319451 DOI: 10.3390/foods11142014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 11/28/2022] Open
Abstract
A new rapid and accurate method was developed for simultaneous determination of pyridoxine and pyridoxal in ginkgo seeds, using ultra-performance liquid chromatography (UPLC) equipped with a fluorescence detector. Diluted hydrochloric acid solution was used as the extracting solvent. For the pretreatment of extracts, a zeolitic imidazolate framework material (ZIF-8) was prepared and characterized. An ODS-BP column (4.6 mm × 250 mm × 5 μm) was used for separation. The conditions of sample extraction, cleaning and separation were optimized. The linear correlation coefficient (R2) of the analyte was better than 0.9999, indicating good linearity. The limits of detection (LODs) of pyridoxal and pyridoxine were 0.0065 mg/kg and 0.0057 mg/kg, respectively, and limits of quantitation (LOQs) were 0.022 mg/kg and 0.019 mg/kg, respectively. The recovery of the two substances ranged from 86.2% to 110.4%, and the relative standard deviation (n = 6) was less than 7.5%. The method was applied to determine the contents of pyridoxine and pyridoxal in actual ginkgo seed samples with satisfactory results.
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Affiliation(s)
- Yuan Gao
- College of Chemistry, Nanchang University, Nanchang 330047, China; (Y.G.); (M.X.); (Y.W.)
| | - Mengjia Xu
- College of Chemistry, Nanchang University, Nanchang 330047, China; (Y.G.); (M.X.); (Y.W.)
| | - Zhe Zheng
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang), Key Laboratory of Bioactive Polysaccharides of Jiangxi Province, Nanchang University, Nanchang 330047, China;
| | - Yiqun Wan
- College of Chemistry, Nanchang University, Nanchang 330047, China; (Y.G.); (M.X.); (Y.W.)
| | - Shihang Wu
- Affiliated School, Nanchang University, Nanchang 330047, China;
| | - Chang Li
- State Key Laboratory of Food Science and Technology, China-Canada Joint Laboratory of Food Science and Technology (Nanchang), Key Laboratory of Bioactive Polysaccharides of Jiangxi Province, Nanchang University, Nanchang 330047, China;
- Correspondence:
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De Pascale M, Benedetti FM, Lasseuguette E, Ferrari MC, Papchenko K, Degli Esposti M, Fabbri P, De Angelis MG. Mixed Matrix Membranes Based on Torlon ® and ZIF-8 for High-Temperature, Size-Selective Gas Separations. MEMBRANES 2021; 11:membranes11120982. [PMID: 34940483 PMCID: PMC8703552 DOI: 10.3390/membranes11120982] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/05/2021] [Accepted: 12/07/2021] [Indexed: 11/16/2022]
Abstract
Torlon® is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced He/CO2 and H2/CO2 separations, by compounding Torlon® with a highly permeable filler, ZIF-8, to fabricate Mixed Matrix Membranes (MMMs). The effect of filler loading, gas size, and temperature on the MMMs permeability, diffusivity, and selectivity was investigated. The He permeability increased by a factor of 3, while the He/CO2 selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to Torlon®; similar trends were observed for the case of H2. The MMMs permeability and size-selectivity were both enhanced by temperature. The behavior of MMMs is intermediate between the pure polymer and pure filler ones, and can be described with models for composites, indicating that such materials have a good polymer/filler adhesion and their performance could be tailored by acting on the formulation. The behavior observed is in line with previous investigations on MMMs based on glassy polymers and ZIF-8, in similar conditions, and indicates that ZIF-8 can be used as a polymer additive when the permeability is a controlling aspect, with a proper choice of loading and operative temperature.
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Affiliation(s)
- Matilde De Pascale
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- GVS S.p.A via Guido Rossa 30, 40069 Zola Predosa, Italy
| | - Francesco Maria Benedetti
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- Osmoses Inc., 444 Somerville Ave, Somerville, MA 02143, USA
| | - Elsa Lasseuguette
- School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UK; (E.L.); (M.-C.F.)
| | - Maria-Chiara Ferrari
- School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UK; (E.L.); (M.-C.F.)
| | - Kseniya Papchenko
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UK; (E.L.); (M.-C.F.)
| | - Micaela Degli Esposti
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- Italian Consortium for Science and Technology of Materials (INSTM), 50121 Firenze, Italy
| | - Paola Fabbri
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- Italian Consortium for Science and Technology of Materials (INSTM), 50121 Firenze, Italy
| | - Maria Grazia De Angelis
- Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy; (M.D.P.); (F.M.B.); (K.P.); (M.D.E.); (P.F.)
- School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UK; (E.L.); (M.-C.F.)
- Italian Consortium for Science and Technology of Materials (INSTM), 50121 Firenze, Italy
- Correspondence:
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