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Reference type: Journal
Authors: Yilmaz H, Basan H
Article Title: Preconcentration of indapamide from human urine using molecularly imprinted solid-phase extraction.
Publication date: 2015
Journal: Journal of Separation Science
Page numbers: n/a.
DOI: 10.1002/jssc.201500427

Abstract: A simple, sensitive, and selective molecularly imprinted solid-phase extraction and spectrophotometric method has been developed for the clean-up and preconcentration of indapamide from human urine. Molecularly imprinted polymers were prepared by a non-covalent imprinting approach using indapamide as a template molecule, 2-(trifluoromethyl) acrylic acid as a functional monomer, ethylene glycol dimethacrylate as a crosslinker, N,N-azobisisobutyronitrile as a thermal initiator and acetonitrile as a porogenic solvent. A non-imprinted polymer was also prepared in the same way, but in the absence of template. Molecularly imprinted polymer and non-imprinted polymer sorbents were dry-packed into solid-phase extraction cartridges. Eluates from cartridges were analyzed using a spectrophotometer for the determination of indapamide by referring to the calibration curve in the range 0.14-1.50 μg mL-1. Preconcentration factor, LOD, and LOQ were 16.30, 0.025 μg mL-1, 0.075 μg mL-1, respectively.A relatively high imprinting factor (9.3) was also achieved and recovery values for the indapamide spiked into human urine were in the range of 80.1-81.2%. In addition, relatively low within-day (0.17-0.42%) and between-day (1.1-1.4%) precision values were obtained as well. The proposed molecularly imprinted solid-phase extraction and spectrophotometric method was successfully applied to selective extraction, preconcentration, and determination of indapamide from human urine samples. This article is protected by copyright. All rights reserved
Author keywords: Human urine, indapamide, Molecularly imprinted polymers, Preconcentration solid-phase extraction


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