Complexation of calcium and copper with carbohydrates: Implications for seawater speciation
Complexation of calcium and copper with carbohydrates: Implications for seawater speciation
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钙和铜与碳水化合物的络合：对海水形态的影响
DOI：
10.1016/0304-4203(86)90051-4
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发表时间：
1986
期刊：
影响因子：
3
通讯作者：
J. W. Haas
中科院分区：
文献类型：
--
作者：
J. W. Haas
钙（II）和铜（II）与海水中发现的33种碳水化合物的络合程度已确定电位使用钙和铜离子选择性电极。测量在25°C下在0.70 M KNO3中在基本上中性的水性介质中进行。中性糖与Ca（II）和Cu（II）离子形成非常弱的1：1络合物。含羧酸根的糖与强得多的络合物形成的络合物（K′Cu（II）>K′Ca（II））。络合的程度取决于糖配体的构象。
The extent of complexation of calcium(II) and copper(II) with 33 carbohydrates found in seawater has been determined potentiometrically using calcium and copper ion-selective electrodes. The measurements were performed in an essentially neutral aqueous medium at 25°C in 0.70 M KNO3.Neutral sugars form very weak 1:1 complexes with Ca(II) and Cu(II) ions. Sugars with carboxylate groups from much stronger complexes.K′Cu(II)>K′Ca(II)) for a given sugar. The extent of complexation is dependent on the conformation of the sugar ligand.