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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2010年第5期622-624,共3页
Chemical Research and Application
关键词
钴
催化光度法
没食子酸
过氧化氢
cobalt
catalytic spectrophotometry
gallic acid
hydrogen peroxide
