Applied Chemistry (응용화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Selective and Sensitive Determination Method of Fe(II) ion using DTPA in Luminol-H2O2 System

Fe(II)-DTPA 착물의 촉매작용을 이용한 루미놀 화학발광 시스템의 선택적 Fe(II) 정량

  • Lee, Sang Hak (Department of Chemistry, Kyungpook National University) ;
  • Kim, Kyung Min (Department of Chemistry, Kyungpook National University) ;
  • Hong, Suk Joo (Department of Sensor and Display Engineering, Kyungpook National University) ;
  • Kim, Gyu-Man (School of Mechanical Engineering, Kyungpook National University) ;
  • Jo, Hae Jin (Department of Chemistry, Kyungpook National University) ;
  • Jang, Taek Gyun (Department of Chemistry, Kyungpook National University) ;
  • Kim, Young Ho (Research Institute of Advanced Energy Technology, Kyungpook National University)
  • 이상학 (경북대학교 화학과) ;
  • 김경민 (경북대학교 화학과) ;
  • 홍석주 (경북대학교 센서 및 디스플레이 공학과) ;
  • 김규만 (경북대학교 기계공학부) ;
  • 조해진 (경북대학교 화학과) ;
  • 장택균 (경북대학교 화학과) ;
  • 김영호 (경북대학교 차세대에너지 기술연구소)
  • Published : 2011.11.30

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Abstract

A sensitive and selective determination method of Fe(II) ion by luminol-H2O2 system using a chelating reagent has been presented. A metal ion-chelating ligand complex such as Fe(II)-diethylenetriamine pentaacetic acid (DTPA) produced higher chemiluminescence (CL) intensity as well as longer lifetime in luminol-H2O2 system than metal exist as free ions. Furthermore, the catalytic activity of Cu(II) and Pb (II) complexes with chelating reagents in luminol-H2O2 system was lost since chelating reagents act as a masking agent although free Cu(II) and Pb(II) ions have high catalytic activity. On the optimized conditions, the calibration curve of Fe(II) ion was linear over the range from 1.0×10-7 to 2.0×10-5 M with correlation coefficient of 0.996. The detection limit was calculated to be 4.0×10-8 M.

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Acknowledgement

This work was supported by the Korea Research Council of Fundamental Science and Technology (KRCF) through Basic Research Project managed by the Korea Research Institute of Standards and Science (KRISS). This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093819).