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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 16, Number 6
JKCSEZ 16(6)
December 20, 1972 

Complexes of Alkaline Earth Metals with Organic Acids

알칼리토류 금속의 유기산 착물
Sang Up Choi, Hi Chun Kang

최상업, 강희천
방사성의 Ba++, Sr++, Ca++ 이온과 양이온 교환수지를 이용한 평형교환법에 의하여 알칼리토류 금속이온과 2염기 유기산 이온사이에 어떤 착물이 형성되는가를 실온에서 조사하였다. 유기산으로써 썩신산과 타르타르산을 사용하였고, 용매로서는 H2O, 20% 아세톤-H2O 및 20% 에탄올-H2O를 사용하였다. 용액의 pH 는 7.2∼7.4로 조절하였고 용액의 이온 강도는 약 0.1로 조절하였다. 본 연구결과 알칼리토류 금속이온과 썩신산 또는 타르타르산 사이에 1:1 착물이 용액내에서 형성됨을 알았고 또 착물의 상대적 안정도가 다음 순으로 증가함을 알았다. Ba++ < Sr++ < Ca++; 썩신산 < 타르타르산; 수용액 < 혼합용매

Formation of the complexes of barium, strontium and calcium ions with dibasic organic acid ions in dilute solution was studied at room temperature, utilizing the equilibrium exchange technique which involved the uses of radioactive alkaline earth metal ions and cation excbange resin. The organic acids used in this study were succinic and tartaric acids, and the solvents used were water, 20 % acetone-water and 20 % ethanol-water. The pH of the solutions was controlled to 7.2∼7.4, and the ionic strength of the solutions was kept at approximately 0.1. The experimental results indicated that the alkaline earths formed one-to-one complexes in solution with the dibasic acids examined, and that the relative stabilities of the complexes increased in the order: Ba++ < Sr++ < Ca++; succinic < tartaric acid; aqueous < mixed solvent system

354 - 360
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