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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 47, Number 6
JKCSEZ 47(6)
December 20, 2003 
 
Title
 Separation and Determination of Co(II) and Ni(II) Ion as their 4-(2-Pyridylazo) resorcinol Chelates by Reversed-Phase Capillary High-Performance Liquid Chromatography

역상 모세관-고성능 액체 크로마토그래피에 의한 코발트와 니켈 이온의 4-(2-피리딜아조)레조루신올 킬레이트로서의 분리 및 정량
Author
 Yongsoon Chung*, Wonseog Chung

정용순*, 정원석
Keywords
 역상 모세관 고성능액체크로마토그래피(Capillary-HPLC), 코발트(II)이온, 니켈(II)이온, 4-(2-피리딜아조) 레조루신올(PAR) , Reversed-Phase Capillary-HPLC, Cobalt(II) ion, Nickel(II) ion, 4-(2-Pyridylazo) Resorcinol (PAR)
Abstract
 코발트와 니켈 이온을 4-(2-피리딜아조)레조루신올(PAR) 리간드와 킬레이트를 만들고 이 금속-PAR 킬레이트들을 역상 모세관 고성능 액체 크로마토그래피(RP-CpHPLC)로 분리와 정량을 하였다. 컬럼은 주로 Vydac C4 모세관 컬럼을, 이동상은 아세토니트릴(MeCN) 수용액을 사용하였다. 머무름 인자, k와 봉우리 높이에 대한 이동상의 pH와 MeCN 농도의 영향을 검토하여 분리와 정량의 최적 조건을 얻었다. 결과, 분리의 최적 이동상은 22.5% MeCN, pH 5.6이었고, Co(II) 이온의 정량은 이 조건에서 할 수 있었다. 그러나 Ni(II) 이온의 정량은 분리와 봉우리의 높이로부타 22.5% MeCN, pH 7.20이 보다 적합함을 확인하였다. 각각의 조건에서 Co(II)와 Ni(II) 이온의 검출한계(D.L., S/N=3)는 각각 2.0x10-7 M(14.9 ppb)와 1,0x10-6 M(59.2 ppb)였다.

Separation and determinations of Co(II) and Ni(II) ions as their 4-(2-pyridylazo)resorcinol(PAR) chelates by reversed-phase capillary high-performance liquid chromatography(RP-CpHPLC) were performed. Among many capillary columns, Vydac C4 column was selected and acetonitrile solution was used as mobile phase. The effect of pH and MeCN concentration(%) on the retention factor, k and peak intensity was examined and discussed. As a results, it was found that 22.5% MeCN and pH 5.60 was adequate as mobile phase for the separation of the two metal ions and determination of Co(II) ion, but the mobile phase condition for Ni(II) ion determination was 22.5% MeCN of pH 7.20. Detection limit(D.L., S/N=3) of Co(II) and Ni(II) ions were 2.0x10-7 M(14.9 ppb) and 1,0x10-6 M(59.2 ppb), respectively.

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