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Reference type: Journal
Authors: Han DM, Fang GZ, Yan XP
Article Title: Preparation and evaluation of a molecularly imprinted sol-gel material for on-line solid-phase extraction coupled with high performance liquid chromatography for the determination of trace pentachlorophenol in water samples.
Publication date: 2005
Journal: Journal of Chromatography A
Volume: 1100
Issue: (2)
Page numbers: 131-136.
DOI: 10.1016/j.chroma.2005.09.035
Alternative URL: http://www.sciencedirect.com/science/article/B6TG8-4H68T3G-6/2/570015acc24b540b2b8fcb3c97988f85

Abstract: A highly selective imprinted amino-functionalized silica gel sorbent was prepared by combining a surface molecular imprinting technique with a sol-gel process for on-line solid-phase extraction-HPLC determination of trace pentachlorophenol (PCP) in water samples. The PCP-imprinted amino-functionalized silica sorbent was characterized by FT-IR, SEM, nitrogen adsorption and the static adsorption experiments. The imprinted functionalized silica gel sorbent exhibited high selectivity and offered a fast kinetics for the adsorption and desorption of PCP. The prepared sorbent was shown to be promising for on-line solid-phase extraction for HPLC determination of trace levels of PCP in environmental samples. With a sample loading flow rate of 5 ml min-1 for 2 min, an enhancement factor of 670 and a detection limit (S/N = 3) of 6 ng l-1 were achieved at a sample throughput of five samples h-1. The precision (RSD) for nine replicate on-line sorbent extractions of 10 μg l-1 PCP was 3.8%. The sorbent also offered good linearity (r = 0.9997) for on-line solid-phase extraction of trace levels of PCP. The method was applied to the determination of PCP in local lake water, river water and wastewater samples
Template and target information: pentachlorophenol, PCP
Author keywords: pentachlorophenol, Solid-phase extraction, molecular imprinting, high performance liquid chromatography


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