摘要
将纳米氧化铁修饰电极制备成电位型传感器用于抗坏血酸的测定,并研究其性能、测定条件及干扰物质的影响。结果表明:该传感器在pH6.5的磷酸缓冲溶液中对抗坏血酸标准溶液的线性范围1.0×10-6～1.0×10-3mol/L呈良好的线性关系(r=-0.9969),斜率为-30.2,检出限为8.9×10-7mol/L。利用该传感器测定橙汁和VC药片中的抗坏血酸,获得令人满意的结果。
Nano-Fe2O3-modified graphite electrode was prepared and used as a new potentiometric sensor for the detection of ascorbic acid.The properties,determination conditions and factors of this potentiometric sensor were explored.Results indicated that the linear range of this sensor in phosphate buffer solution with pH 6.5 ranged from 1.0×10^-6 to 1.0×10^-3 mol/L（r=-0.9969） with-30.2 mV/pC slope and 8.9×10^-7 mol/L detection limit.This sensor has been used for determining ascorbic acid in orange juice and vitamin C tablets with satisfactory results.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第6期311-313,共3页
Food Science
