4.7 Article

Chemical bonding of oxygenated carbon nitride nanosheets onto stainless steel fiber for solid-phase microextraction of phthalic acid esters

期刊

ANALYTICA CHIMICA ACTA
卷 1084, 期 -, 页码 43-52

出版社

ELSEVIER
DOI: 10.1016/j.aca.2019.08.015

关键词

Layer-by-layer chemical bonding; Oxygenated carbon nitride nanosheets; Phthalic acid esters; Solid-phase microextraction

资金

  1. National Natural Science Foundation of China [21575028, 21605022]
  2. Program for Changjiang Scholar and Innovative Research Team in University, China [IRT15R11]
  3. Collaborative Innovation Center of Chinese Oolong Tea Industry-Collaborative Innovation Center of Fujian Province

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In this work, oxygenated carbon nitride nanosheets (OCNNSs) were first introduced to the field of analytic chemistry for solid-phase microextraction (SPME). The rich hydroxyl and carboxyl contents of OCNNSs provided abundant adsorption sites. The coated stainless steel fibers, synthesized by the layerby-layer chemical bonding method, had good chemical stability (in organic solvents), long life (durability >= 150 cycles), and good reproducibility (RSDs <= 9.2%). This novel OCNNSs-coated fiber was used for SPME with gas chromatography-mass spectrometry (GC-MS) for the analysis of phthalic acid esters (PAEs) in three types of food products (seafood, samshu, and instant noodles). Under optimal conditions, the limits of detection (LODs) for the PAEs ranged from 0.1 to 10.0 pg mL(-1), and recovery was in the range of 80.0-118.1%. These novel coated SPME fibers displayed excellent separation and enrichment properties, which suggest a pretreatment application for analysis of PAEs. (C) 2019 Elsevier B.V. All rights reserved.

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