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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 43, Number 5
JKCSEZ 43(5)
October 20, 1999 

Spectrophotometric Determination of Iron with 2-HydroxybenzaIdehyde-5-nitro-pyridylhydrazone after Separation with Amberlite XAD-7 Nonionic Resin

Amberlite XAD-7 비이온성 수지로 분리후 2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone을 이용한 철의 분광학적 정량
Chan-Il Park, Byung-Doo Chung, Duck-Chae Jung, Ki-Won Cha

박찬일, 장병두, 정덕채, 차기원
2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone(2HB-5NPH)를 합성하여 철의분광학적 정량에 응용하였다. 이 시약은 pH 6.0-7.5 범위에서 철과 반응하여 메탄올 용액에서 매우 안정한 노란색의 1:2킬레이트를 형성한다. 철의 농도범위가 0.05∼2.0 gmLㅢ일 때 Beer's law에 적용되고 미량의 철을 분광학적으로 정량하기 위하여 Amberlite XAD-7 비이온성 킬레이트 수지로 채워진 짧은 컬럼을 사용하여 분리과정에 적용하였다·몇가지 이온들의 방해 효과를 연구하였다. 혼합용액으로부터 철이온의 분리는 완충용액(pH 5.0)과 용리액으로서 0.25M HCl을 가지고 수행하였다.

2-Hydroxybenzaldehyde-5-nitro-pyridylhydrazone (2HB-5NPH) was synthesized and its application to the spectrophotometric determination of iron was studied. The reagent reacts with iron in the pH range 6.0-7.5 to form a yellow coIored 1:2 chelate which is very stable in methanol solution. Beer's law is obeyed in the concentration range 0.05∼2.0 gmL-l iron and separation procedure using a short column filled with Amberlite XAD-7 nonionic chelating resin is proposed for the spectrophotometric determination of traces of iron. The influence of several ions as interference was discussed. The separation of Fe(III) ion from the mix-ture solution were carried out with the buffer solution (pH 5.0) and 0.25M HCl as eluents.

522 - 526
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