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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 56, Number 2
JKCSEZ 56(2)
April 20, 2012 

Spectrophotometric Quantitative Analysis of Cu(II) Ion Using N,N'-bis(4-methoxysalicylidene)phenylendiamine

N,N'-bis(4-methoxysalicylidene)phenylendiamine를 이용한 Cu(II) 이온의 분광학적 분석
Sun Deuk Kim, Jong Min Seol

김선덕, 설종민
4-CH3O-salphen, Spectrophotometric quantitative analysis of Cu(II), Limit of determination
A N2O2 Schiff base ligand, N,N'-bis(4-methoxysalicylidene)phenylendiamine (4-CH3O-salphen) was synthesized. Using the 4-CH3O-salphen, the spectrophoto-metric quantitative analysis of Cu(II) ion in aqueous solution was performed. The optimum condition for the quantitative analysis of Cu(II) ion was determined as the following; the concentration of 4- CH3O-salphen is 2.0×10-4 mol/L, ratio between solvent DMSO and water is 50/50(v/v), pH is 5.5. After 1 hr water incubation at 55 oC and then the absorbance measurements at 388 nm, a calibration curve (ε=3.6×104 mol-1cm-1) with a correlation coefficient (R2=0.9963) was obtained in this condition. Using this optimized condition, the quantitative analysis of Cu(II) ion was performed with various samples such as hot spring water, semiconductor factory waste water and treated water from sewage treatment plant. The average value of the measured values agreed well with standard value with a range of 0.6~5.4%. The limit of determination was 31.77 ng/mL (5.0×10-7 mol/L).
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