摘要
本研究对不同ｐＨ值下，不同抗坏血酸水平及不同时间内硫酸亚铁溶液中以不同化学状态存在的铁进行了定量分析和研究。结果表明，低ｐＨ有利于硫酸亚铁以溶解、离子化及二价形式存在，ｐＨ的升高则具有相反的作用，特别是随时间的延长更加明显。抗坏血酸的存在可以促进硫酸亚铁的溶解，促进其离子化以及保持离子态铁稳定地以二价形式存在，有效地防止了硫酸亚铁在高ｐＨ环境下的不溶及二价铁被氧化为三价铁。抗坏血酸的这些作用是通过其还原及络合作用实现的。
The chemical forms of iron in ferrous sulphate soltition at different pH values,different ascorbic adic levels and different times were dirtemined quantitatively in this study.The results showed that low pH condition was favourable for the solubilization、ionizationand ferrous state keeping of ferrous sulphate solution,hight pH valtie played a opposite roleon it,especially in a long time. Ascorbic acid could improve solubilization and ioniazation offerrous sulphate,and could hold ionized iron with ferrous form. It was effective to preventferrous sulphate solution form insolubildzatuion and oxidationof ferrous to ferric in high pHcondition. All these functions of ascorbic acid was presented through redtiction and complex- ing.
基金
国家自然科学基金会资助
关键词
硫酸亚铁
化学状态
PH
维生素C
ferrous sulphate chemical state of iron pH value ascorbic acid.
