Study on the Spectrophotometric Determination of Rare Earth by Ternary Complex Using Xylenol Orange and Surfactant

Xylenol Orange와 계면활성제의 삼성분 착물에 의한 희토류원소의 분광광도법 정량에 관한 연구

  • 차기원 (인하대학교 이과대학 화학과) ;
  • 박찬일 (인하대학교 이과대학 화학과) ;
  • 강선희 (인하대학교 이과대학 화학과) ;
  • 장병두 (시립 인천대학교 이과대학 화학과)
  • Received : 1994.07.04
  • Published : 1994.09.25


The spectrophotometric determination of rare earth elements with XO was investigated in the presence of cetylpyridium chloride(CPC), dodecyltrimethylammonium bromide(DTMAB), cetyltrimetylammonium bromide (CTMAB), Triton X-100 at pH 6.2. The complex between XO and rare earth elements in the presence of cationic surfactants was very stable and more sensitive than in the absence of surfactants. The largest absorbance increase was provided by CTMAB, which was therefore chosen for determination of rare earth elements. REE-XO-CTMAB complex has absorption maxima at 618nm and obeys the Beer's law in the range of 0~0.5 ppm. Molar absorptivity was $1.5{\times}10^5mol^{-1}cm^{-1}l$.