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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 50, Number 1
JKCSEZ 50(1)
February 20, 2006 

 
Title
Preconcentration and Extraction of Copper on Activated Carbon Using 4-Amino-2, 3-dimethyl-1-phenyl-3-pyrazoline or 4-(4-methoxybenzylidenimin) thiophenole

4-Amino-2,3-dimethyl-1-phenyl-3-pyrazoline 또는 4-(4-Methoxybenzylidenimin)thiophenole을 이용한 활성탄에서의 구리의 예비 농축 및 추출
Author
Mehrorang Ghaedi*, Farshid Ahmadi, Hajir Karimi, Shiva Gharaghani

Mehrorang Ghaedi*, Farshid Ahmadi, Hajir Karimi, Shiva Gharaghani
Keywords
4-Amino-2,3-dimethyl-1-phenyl-3-pyrazoline(ADMPP), 4-(4-Methoxybenzylidenimin)thiophenole(MBITP), Cu(II) 이온, 고체상추출, 활성탄, 원자흡수분광법 , 4-Amino-2, 3-dimethyl-1-phenyl-3-pyrazoline (ADMPP), 4-(4-Methoxybenzylidenimin) thiophenole (MBITP), Cu (II) ions, Solid
Abstract
불꽃 원자흡수분광법을 사용하여 실제 시료 중의 구리를 예비 농축하고 정량하는데 활성탄 변형법을 사용하였다. 구리 이온을 4-amino-2,3-dimethyl-1-phenyl-3-pyrazoline(ADMPP) 또는 4-(4-methoxybenzylidenimin)thiophenole(MBITP)과 착물을 형성시켜 활성탄에 정량적으로 흡착시키고, 고체상에 흡착된 구리를 소량의 질산을 사용하여 정량적으로 용리시켰다. 최대 회수율을 얻는데 있어서 중요한 pH, 운반체의 양, 흐름속도, 활성탄의 양, 용리제의 종류 및 농도와 같은 파라미터의 영향을 조사하였다. 최적 조건에서 ADMPP와 MBITP를 사용하는 이 방법은 0.05-1.5 μg mL-1 and 0.05-1.2 μg mL-1의 구리 농도 범위에서 각각 상관계수 0.9997 및 0.9994의 선형성을 보이며 검출한계는 1.4 ngmL-1 였다. 예비 농축의 농축인자는 310에 이르며 돌파부피는 두 리간드에서 모두 1550 mL였다. 이 방법은 방해 이온에 대한 공차한계와 선택성이 좋아서 수돗물, 샘물, 강물 및 폐수와 같은 실제 시료 중의 구리 함량을 정량하는 데 성공적으로 사용되었다.

Activated carbon modified methods were used for the preconcentration and determination of copper in some real samples using the flame atomic absorption spectrometry. The copper ions was adsorbed quantitatively on the activated carbon due to their complexation with 4- amino-2, 3-dimethyl-1-phenyl-3-pyrazoline (ADMPP) or 4-(4- methoxybenzylidenimin) thiophenole (MBITP). The adsorbed copper on solid phase was eluted quantitatively using small amount of nitric acid. The influence of important parameters including pH, amount of carrier, flow rate, amount of activated carbon and type and concentration of eluting agent for obtaining maximum recovery were investigated. The methods based on ADMPP and MBITP at optimum conditions is linear over concentration range of 0.05-1.5 ig mL-1 and 0.05-1.2 ig mL-1 of copper with correlation coefficient of 0.9997 and 0.9994 and both detection limit of 1.4 ng mL-1, respectively. The preconcentration leads to enrichment factor of 310 and break through volume of 1550 mL for both ligands. The method has a good tolerance limit of interfering ion and a selectivity that has been successfully applied for the determination of copper content in real sample such as tap, spring, river and waste water.

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