• 文献标题:   Application of Graphene as a Sorbent for the Preconcentration and Determination of Trace Amounts of Copper in Urine Samples Prior to Flame Atomic Absorption Spectrometry
  • 文献类型:   Article
  • 作  者:   DONG YL, ZHANG JW, WANG YK, LI JC, MA JJ
  • 作者关键词:   graphene, solidphase extraction, preconcentration, flame atomic absorption spectrometry, copper
  • 出版物名称:   JOURNAL OF THE CHEMICAL SOCIETY OF PAKISTAN
  • ISSN:   0253-5106
  • 通讯作者地址:   Agr Univ Hebei
  • 被引频次:   2
  • DOI:  
  • 出版年:   2013

▎ 摘  要

The potential of graphene as solid-phase extraction adsorbent for the separation and preconcentration of copper (Cu) has been investigated. Cu could be adsorbed quantitatively on graphene in the pH range of 4.0-7.0, and then eluted completely with 2.0 mL of 2.0 mol L-1 HNO3 solution at a flow rate of 2.0 mL min(-1). A new method using a microcolumn packed with graphene as the sorbent was developed for the preconcentration of trace amounts of Cu prior to their determination by flame atomic absorption spectrometry (FAAS). Several effective parameters on the extraction and complex formation were selected and optimised. Under optimum conditions, an enrichment factor of 150 was obtained. The calibration graph was linear in the concentration range of 10.0-180.0 mu g L-1 with a detection limit of 0.27 mu g L-1. The relative standard deviation for ten replicate measurements of 10.0 and 70.0 mu g L-1 of Cu were 3.68% and 3.35%, respectively. The method has been applied for the determination of trace amount of Cu in urine samples with satisfactory results.