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Citation: LIU Jingjing, HE Bo. Determination of Trace Cadmium in Water by Wireless Magnetoelastic Immunosensor[J]. Chinese Journal of Applied Chemistry, ;2013, 30(7): 821-825. doi: 10.3724/SP.J.1095.2013.20407 shu

Determination of Trace Cadmium in Water by Wireless Magnetoelastic Immunosensor

LIU Jingjing ,
HE Bo

School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China

Received Date: 17 September 2012
Revised Date: 13 December 2012

A new method for the determination of Cd in the water with a wireless magnetoelastic immunosensor was introduced. In the method,the specific binding of antigen with the antibody made precipitation adhere to the surface of the immunosensor and resulted in a decrease in the resonance frequency of the magnetoelastic foil. The shift of the resonance frequency was related to the concentration of Cd. The influence of some factors such as polyethylene imine dosage,glutaraldehyde dosage and reaction time on the determination was discussed. At the optimized conditions,the linear range for the determination of Cd was in the range of 0.90~10.0 μg/L,with the detection limit of 0.42 μg/L. The proposed method was applied successfully to the determination of Cd in water samples with the recoveries of 96.5%~103.6%. The determination results are basically consistent with that of dithizone colorimetric method.
- Cd,
- wireless magnetoelastic immunosensor,
- immunization,
- wireless detection
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