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Graphene grafted silica‐coated F e 3 O 4 nanocomposite as absorbent for enrichment of carbamates from cucumbers and pears prior to HPLC
Author(s) -
Sun Meng,
Ma Xiaoxing,
Wang Juntao,
Wang Weina,
Wu Qiuhua,
Wang Chun,
Wang Zhi
Publication year - 2013
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.201201036
Subject(s) - nanocomposite , high performance liquid chromatography , pirimicarb , chromatography , chemistry , carbamate , carbaryl , nuclear chemistry , nanoparticle , materials science , pesticide , organic chemistry , nanotechnology , agronomy , biology
In this paper, a novel graphene ( G ) grafted silica‐coated F e 3 O 4 nanocomposite was fabricated by the chemical bonding of G onto the surface of silica‐coated F e 3 O 4 nanoparticles. Some carbamates (metolcarb, carbaryl, pirimicarb, and diethofencarb) in cucumber and pear samples were enriched by this nanocomposite prior to their determination by HPLC with UV detection. Experimental parameters that may affect the extraction efficiency were investigated. Under the optimum conditions, a linear response was achieved in the concentration range of 0.5–100.0 ng/g for metolcarb, carbaryl, and diethofencarb, and 1.0–100 ng/g for pirimicarb with the correlation coefficients ( r ) ranging from 0.9956 to 0.9984. The LOD (S/N = 3) of the method were found to be in the range from 0.08 to 0.2 ng/g. The RSD s were in the range from 2.4 to 5.8%. The results indicated that the G grafted silica‐coated F e 3 O 4 nanocomposite was stable and efficient for magnetic SPE and has a great application potential for the preconcentration of other organic pollutants from real samples.