Determination of phenformin hydrochloride using molecular imprinting technology coupled with flow-injection chemiluminescence.

A novel method was developed using molecular imprinting technology (MIT) coupled with flow-injection chemiluminescence (FI-CL) for highly sensitive detection of phenformin hydrochloride (PH). The phenformin imprinted polymer was synthesized with methacrylic acid (MAA) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross-linker. Newly synthesized molecularly imprinted polymer (MIP) particles were packed into a column as a selective recognition element for determination of PH. A CL method for the determination of PH was developed based on the CL reaction of PH with N-bromosuccinimide sensitized by eosin Y in basic media. The optimization of detection conditions was investigated. The CL intensity responded linearly to the concentration of PH in the range 0.092.0?mu g/mL, with a correlation coefficient of 0.9920. The detection limit was 0.031?mu g/mL. The relative standard deviation for the determination of 1.0?mu g/mL PH solution was 1.0% (n?=?11). The method was applied to the determination of PH in urine samples, with satisfactory results. Copyright (c) 2011 John Wiley & Sons, Ltd.