测定痕量钴的超高灵敏催化光度法的建立及应用  

Catalytic spectrophotometric determination of ultra trace amount of cobalt based on oxidation of gallic acid by hydrogen peroxide

作　　者：胡玉龙[1] 梁冰[1] 廖晓祥[1] 李延芳[1] 顾永祚[2] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学化学学院,四川成都610064

出　　处：《化学研究与应用》2010年第5期622-624,共3页Chemical Research and Application

摘　　要：A novel catalytic spectrophotometric method for determination of trace cobalt has been developed.It was based on the strong catalytic effect of Co(II) on the oxidation of gallic acid by hydrogen peroxide in alkaline medium.The optimum experimental conditions were investigated,the results exhibited that the proposed method had higher sensitivity and good selectivity compared with those reported methods.The calibration graph was linear over the range 2.5×10–3～3.0×10–2ng/mL with a detection limit(3σ) of 6.0×10–4ng/mL.The method had been applied to the determination of cobalt in human hair and water samples with satisfactory results.A novel catalytic spectrophotometric method for determination of trace cobalt has been developed.It was based on the strong catalytic effect of Co（II） on the oxidation of gallic acid by hydrogen peroxide in alkaline medium.The optimum experimental conditions were investigated,the results exhibited that the proposed method had higher sensitivity and good selectivity compared with those reported methods.The calibration graph was linear over the range 2.5×10–3～3.0×10–2ng/mL with a detection limit（3σ） of 6.0×10–4ng/mL.The method had been applied to the determination of cobalt in human hair and water samples with satisfactory results.

关 键 词：钴 催化光度法 没食子酸 过氧化氢 

分 类 号：O657.32[理学—分析化学]