Chinese Journal of Applied Chemistry

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Preparation of Imidazolyl Substituted β-Cyclodextrin Polymers as a Solid-phase Extractant and Its Analytical Application

ZHOU Nan, ZHU Xiashi*   

  1. (College of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China)
  • Received:2013-07-01 Revised:2013-08-07 Online:2014-04-10 Published:2014-04-10
  • Contact: zhu

Abstract: Mono-6-deoxy-6-imidazole-β-cyclodextrin polymer(β-CDIMCP) was synthesized and used as a new solid phase adsorbent to pre-concentrate/separate trace amount of safranine T in solutions. The results from UV-visible spectroscopy measurements show that β-CDIMCP had a better adsorption performance than β-CDCP. Safranine T was adsorbed by β-CDIMCP rapidly with an adsorption efficiency of 95% at room temperature and pH=11.0. When 3.0 mL of anhydrous ethanol was used as the eluant, the elution efficiency reached 90% in 8 minutes. Under the optimum condition, the preconcentration factor of the proposed method was 10. The detection limit(DL), RSD, linear range, and correlation coefficient was found to be 4.9 μg/L, 3.4%(n=3, ρ=3.00 mg/L), 0.09~6.0 mg/L and 0.9972, respectively. This proposed method was successfully applied to the determination of safranine T in real samples. The molecular interaction between β-CDIMCP and safranine T was studied through the inclusion constant study.

Key words: safranine T, imidazole-&, beta, -cyclodextrin polymer, solid-phase extraction, ultra-violet spectroscopy

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