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Citation: ZHANG Yi, HAN Xiaoyan, ZHAO Peili, GUO Weiyi, ZHANG Zhengpu. Sulfonation Modification of the Polytetrafluoroethene Fiber for Solid Extraction Coupled with High-performance Liquid Chromatography for Determination of Trace Melamine in Milk Preparations[J]. Chinese Journal of Applied Chemistry, ;2011, 28(4): 448-453. doi: 10.3724/SP.J.1095.2011.00395 shu

Sulfonation Modification of the Polytetrafluoroethene Fiber for Solid Extraction Coupled with High-performance Liquid Chromatography for Determination of Trace Melamine in Milk Preparations

1.
a Department of Experimental Teaching, Tianjin University of Traditional Chinese Medicine, Tianjin 300193;
2.
b Institute of Chinese Medical, Tianjin Key Laboratory of Chemistry and Analysis of Chinese Material Medical, Tianjin University of Traditional Chinese Medicine, Tianjin 300193;
3.
c Institute of Polymer Chemistry, The Education Ministry Key Laboratory of Function Polymeric Materials, Nankai University, Tianjin

Corresponding author: HAN Xiaoyan,
Received Date: 6 July 2010
Available Online: 28 September 2010

A preconcentration column packed with home-made sulfonated glycidyl methacrylate(GMA)-grafted-polytetrafluoroethylene(PTFE) polymer(PTFE-g-GMA-SO₃H) fiber,coupled with high-performance liquid chromatography(HPLC) and flow injection,fiber was developed for trace melamine determination in the samples.The on-line determination method using the fiber as adsorbent for trace melamine in two milk sample was demonstrated.The conditions for preconcentration and elution of melamine were optimized.In addition,analytical performance of trace melamine determination was acquired in this article.The enrichment factor for melamine was 300 and the detection limits was 1.13×10^-2 mg/L.The relative standard derivation was 7.6%(n=9) when the melamine concentration was 0.2 mg/L,and the recovery of samples was 98% and 102.5%,respectively.
- sulfonated glycidylmethacrylate grafted polytetrafluoroethylene,
- on line solid extraction,
- melamine
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