戊二醛
电位滴定法
检出限
磁性纳米粒子
纳米颗粒
化学
色谱法
共价键
材料科学
电极
核化学
纳米技术
有机化学
物理化学
作者
Jianping Li,Huiling Gao
标识
DOI:10.1002/elan.200704094
摘要
Abstract A renewable potentiometric immunosensor for detection of immunoglobulin G (IgG) has been developed by magnetic force attraction of Fe 3 O 4 nanoparticles immobilized goat‐anti‐human IgG antibody. For preparing sensitive film of the sensor, cysteine was bonded on the nano‐Fe 3 O 4 particles surface. The cysteine functionalized magnetic nanoparticles was attracted on a solid paraffin carbon paste electrode surface to covalently immobilize of anti‐immunoglobulin G (anti‐IgG) by employing a conventional glutaraldehyde‐crosslinking method. The immunosensor showed a specific response to human immunoglobulin G in the range of 0.1–1.2 ng/mL with a detection limit of 0.023 ng/mL. The immunosensor based on the magnetic nanoparticles was made easily by this method. It can be used expediently, renewed easily and low‐cost relatively. The renewable potentiometric immunosensor with better stability and higher sensitivity can be employed extensively in clinical diagnosis, monitoring of disease and environmental studies and etc.
科研通智能强力驱动
Strongly Powered by AbleSci AI