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Study on the Spectrophotometric Determination of Rare Earth by Ternary Complex Using Xylenol Orange and Surfactant
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.3, pp.277-284
Cha,
K., Park,
C., Kang,
S., &
Chang,
B.
(1994). Study on the Spectrophotometric Determination of Rare Earth by Ternary Complex Using Xylenol Orange and Surfactant. Analytical Science and Technology, 7(3), 277-284.
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Abstract
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 <TEX>$1.5{\times}10^5mol^{-1}cm^{-1}l$</TEX>.
- keywords
- Xylenol Orange, CTMAB, CPC, Ternary Complex
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