Issue 117, 2015

Selective determination of monosodium glutamate (Ajinomoto) in food samples using a potentiometric method with a modified multiwalled carbon nanotube based molecularly imprinted polymer

Abstract

The aim of the present work was to test the use of a surface modified multi-walled carbon nanotube based molecularly imprinted polymer (MWCNT-MIP) for the selective identification of monosodium glutamate (MSG) in food samples. The hydroxylated MWCNTs were reacted with allyl bromide to form vinylated MWCNTs (MWCNT-CH[double bond, length as m-dash]CH2). The MWCNT-MIP was synthesized by selective polymerization of MWCNT-CH[double bond, length as m-dash]CH2 with itaconic acid (IA) as the functional monomer in the presence of MSG using ethylene glycol dimethacrylate (EGDMA) as a cross-linker and α,α′-azobisisobutyronitrile (AIBN) as the initiator. The organized material was characterized using different instrumental techniques. The proposed sensor has a response time of ∼1 min and the calculated detection limit for MSG was 1.0 × 10−9 mol L−1. The sensitivity obtained for the MWCNT-MIP sensor is 56 mV per decade. The linear range obtained for the sensor is 10−9 to 10−5 mol L−1. The MWCNT-MIP sensor membrane is an effective tool for the identification of MSG in food samples.

Graphical abstract: Selective determination of monosodium glutamate (Ajinomoto) in food samples using a potentiometric method with a modified multiwalled carbon nanotube based molecularly imprinted polymer

Article information

Article type
Paper
Submitted
03 Sep 2015
Accepted
18 Oct 2015
First published
11 Nov 2015

RSC Adv., 2015,5, 96840-96850

Selective determination of monosodium glutamate (Ajinomoto) in food samples using a potentiometric method with a modified multiwalled carbon nanotube based molecularly imprinted polymer

T. S. Anirudhan and S. Alexander, RSC Adv., 2015, 5, 96840 DOI: 10.1039/C5RA17885A

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