A new restricted access molecularly imprinted polymer capped with albumin for direct extraction of drugs from biological matrices: the case of chlorpromazine in human plasma

Anal Bioanal Chem. 2013 Sep;405(24):7687-96. doi: 10.1007/s00216-013-7275-5. Epub 2013 Aug 13.

Abstract

A new restricted access molecularly imprinted polymer coated with bovine serum albumin (RAMIP-BSA) was developed, characterized, and used for direct analysis of chlorpromazine in human plasma samples. The RAMIP-BSA was synthesized using chlorpromazine, methacrylic acid, and ethylene glycol dimethacrylate as template, functional monomer, and cross-linker, respectively. Glycerol dimethacrylate and hydroxy methyl methacrylate were used to promote a hydrophilic surface (high density of hydroxyl groups). Afterward, the polymer was coated with BSA using glutaraldehyde as cross-linker, resulting in a protein chemical shield around it. The material was able to eliminate ca. 99% of protein when a 44-mg mL(-1) BSA aqueous solution was passed through it. The RAMIP-BSA was packed in a column and used for direct analysis of chlorpromazine in human plasma samples in an online column switching high-performance liquid chromatography system. The analytical calibration curve was prepared in a pool of human plasma samples with chlorpromazine concentrations ranging from 30 to 350 μg L(-1). The correlation coefficient obtained was 0.995 and the limit of quantification was 30 μg L(-1). Intra-day and inter-day precision and accuracy presented variation coefficients and relative errors lower than 15% and within -15 and 15%, respectively. The sample throughput was 3 h(-1) (sample preparation and chromatographic analysis steps) and the same RAMIP-BSA column was efficiently used for about 90 cycles.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Albumins / chemistry*
  • Animals
  • Cattle
  • Chlorpromazine / blood*
  • Chromatography, High Pressure Liquid
  • High-Throughput Screening Assays
  • Humans
  • Microscopy, Electron, Scanning
  • Molecular Imprinting*
  • Molecular Structure
  • Polymers / chemistry*
  • Reproducibility of Results
  • Serum Albumin, Bovine

Substances

  • Albumins
  • Polymers
  • Serum Albumin, Bovine
  • Chlorpromazine