摘要
本文采用含磷10μg/ml的5×10^(-3)mol/L钼酸铵-0.5mol/L硫酸-20％(V/V)丙酮溶液为电极修饰液,制备了性能优良的以玻碳为基体的PMo_(12)薄膜修饰电极,并应用于植酸中无机磷的测定。检测限为0.04μg/ml磷;相对标准偏差(n=5)为4.32％,加标回收率为98％～108％。本法还可应用于植酸及其它含磷试样的分析。
The PMo_(12)-modified glassy carbon electrode has been prepared by electrochemical method in a solution containing 10μg/ml of phosphorus—5×10^(-3) mol/L of molydbate -0.5mol/L of sulfuric acid -20%(V/V), acetone, by 10 scans between 600～100 mV(vs. Ag/AgCl) at a scan rate of 100 nV/s. The electrode has been applied to the determination of inorganic phosphorus in phytic acid by cyclic voltammetry. The detection limit is 0.04μg/ml for phosphorus. The relative standard deviation(n=5) is 4.3%, the recovery is 98%～108%.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1992年第8期945-947,共3页
Chinese Journal of Analytical Chemistry
关键词
修饰电极
循环伏安法
植酸
磷
Modified electrode
Cyclic voltammetry
Phytic acid
Phosphorus.
