氧化铝微柱预富集分光光度法测定天然水体中微量磷酸根  

Spectrophotometric Determination of Orthophosphate in Natural Water After Preconcentration by Activated Alumina Micro column

作　　者：丁健华[1] 谢军辉[1] 

机构地区：[1]佛山科学技术学院,广东佛山528000

出　　处：《分析科学学报》2002年第3期222-225,共4页Journal of Analytical Science

摘　　要：提出了以活性氧化铝微柱预富集分光光度法测定天然水体中的磷酸根。系统研究了氧化铝微柱的吸附性能 ,确定了分离富集磷酸根的最佳条件 ,并且对光度法测定条件进行了优化。本法用于天然水体中微量磷酸根的测定 。A new micro column preconcentration system with actived alumina being used as sorbent was developed for spectrophotometric determination of trace phosphate in natural water. The optimum conditions of the determination of phosphorus were tested. The adsorption of orthophosphate on the micro column packed with activated alumina has been thoroughly studied. The optimal condition of enrichment and separation of phosphorus is established. Under the condition of pH=2.0, orthophosphate was adsorbed rapidly on the activated alumina micro column, the ratained phosphate was eluted quantitatively with a sulfuric acid of 2.5 mol·L -1 . The proposed method was used in the determination of phosphate in natural water with satisfactory results.

关 键 词：测定 天然水体 活性氧化铝 微柱 预富集 分光光度法 磷酸根 微量分析 

分 类 号：O613.62[理学—无机化学] O661.1[理学—化学]