Determination of albumin concentration by MIP-QCM sensor

Biosens Bioelectron. 2004 Jul 30;20(1):75-81. doi: 10.1016/j.bios.2004.01.028.

Abstract

An MIP-QCM sensor able to detect micro-determine albumin concentrations was prepared by imprinting albumin with 3-dimethylaminopropyl methacrylamide-acrylate. The albumin MIP was coated on a QCM Au electrode. The adsorption characteristics of different electrodes, such as Au-OH, Au-COOH, Au-NH2 and Au electrodes, with albumin or mixture was examined. In the tetraethyleneglycol dimethacrylate crosslinking agent system, the adsorption capacity of different Au electrodes is in the order Au-OH > Au-COOH > Au-NH2 > Au. Additionally, the time taken to receive a steady-state frequency is in the order Au-NH2 < Au-OH < Au-COOH < Au. However, in the trimethylolpropane trimethacrylate crosslinking agent system, the adsorption capacity is in the order Au > Au-NH2 > Au-OH > Au-COOH electrode. Hence, the crosslinking agent had a significant effect on the MIP-QCM. On the adsorption selectivity, the albumin MIP-QCM exhibited higher response to albumin, the adsorption mass ratio of cytochrome c:lysozyme:albumin:myoglobin was 160:1:1942:30. On the other hand, in the non-MIP-QCM, the adsorption mass ratio of cytochrome c:lysozyme:albumin:myoglobin was 13:1:249:86. Additionally, a linear fitting was established and a clinical real sample was tested. This novel potential application of molecular imprinting to the recognition element of an MIP-QCM sensor appears to be promising.

Publication types

  • Evaluation Study
  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adsorption
  • Albumins / analysis*
  • Albumins / chemistry*
  • Biosensing Techniques / instrumentation*
  • Biosensing Techniques / methods
  • Coated Materials, Biocompatible / chemistry
  • Complex Mixtures / analysis
  • Complex Mixtures / chemistry
  • Electrochemistry / instrumentation*
  • Electrochemistry / methods
  • Electrodes*
  • Equipment Design
  • Equipment Failure Analysis
  • Humans
  • Polymers / chemistry
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Serum Albumin / analysis*
  • Transducers

Substances

  • Albumins
  • Coated Materials, Biocompatible
  • Complex Mixtures
  • Polymers
  • Serum Albumin