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Graphene‐encapsulated silica as matrix solid‐phase dispersion extraction sorbents for the analysis of poly‐methoxylated flavonoids in the leaves of Murraya panaculata (L.) Jack
Author(s) -
Sun Ting,
Li Xuwen,
Yang Jie,
Li Lanjie,
Jin Yongri,
Shi Xiaolei
Publication year - 2015
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201500002
Subject(s) - extraction (chemistry) , graphene , solid phase extraction , adsorption , silica gel , fourier transform infrared spectroscopy , dispersion (optics) , materials science , scanning electron microscope , matrix (chemical analysis) , chromatography , chemistry , nuclear chemistry , chemical engineering , organic chemistry , nanotechnology , composite material , optics , physics , engineering
In this study, graphene‐encapsulated silica was synthesized by a hydrothermal reduction strategy. The presence of silica in graphene was identified by Fourier‐transform infrared spectrometry, X‐ray diffraction and scanning electron microscopy. The graphene‐encapsulated silica subsequently was used as adsorbent for matrix solid‐phase dispersion extraction of poly‐methoxylated flavonoids from the dried leaves of Murraya panaculata (L.) Jack. Compared with the other adsorbents (graphene, silica gel, C 18 silica, neutral alumina, diatomaceous earth) and without any adsorbents, better results were obtained. Then a method for analysis of poly‐methoxylated flavonoids was established by coupling matrix solid‐phase dispersion extraction with ultra high performance liquid chromatography and UV detection. Compared with reflux extraction and ultrasonic extraction, the proposed method is quicker, more efficient and more environmental protection. Less than 10 min is needed from extraction to detection.