Surface Polymers on Multiwalled Carbon Nanotubes for Selective Extraction and Electrochemical Determination of Rhodamine B in Food Samples

Abstract

In this study, we combine magnetic solid phase extraction (MSPE), with the screen-printed carbon electrode (SPCE) modified by a molecular imprinted polymer (MIP) for sensitive and selective extraction and electrochemical determination of Rhodamine B in food samples. A magnetic solid phase extraction (MSPE) was carried out using magnetic poly(styrene-co-divinylbenzene) (PS-DVB) and magnetic nanoparticles (MNPs) synthetized on the surface of multiwalled carbon nanotubes (MWCNTs). An MIP was prepared on the surface of MWCNTs in the presence of titanium oxide nanoparticles (TiO2NPs) modifying the SPCE for the rapid electrochemical detection of Rhodamine B. The MIPs synthesis was optimized by varying the activated titanium oxide (TiO2) and multiwalled carbon nanotubes (MWCNTs) amounts. The MSPE and electrochemical detection conditions were optimized as well. The present method exhibited good selectivity, high sensitivity, and good reproducibility towards the determination of Rhodamine B, making it a suitable method for the determination of Rhodamine B in food samples.

Silver Nanoparticles Coupled with Graphene Nanoplatelets Modified Screen-Printed Carbon Electrodes for Rhodamine B Detection in Food Products

“…A previous study has shown that the concentration of RhB resulting in a decrease in cell viability was 25 μg/mL, which is equivalent to ∼52 μM . Benmassaoud et al showed a modified SPCE using multiwalled carbon nanotube/TiO 2 that performed a greater sensitivity with an LOD of 0.003 μM of RhB; however, our fabricated sensor’s electrode is still possible to be applied in detecting the presence of RhB in food samples as well.…”

“…As far as we know, only one SPCE modification for the detection of RhB has been reported. 24 Graphene is a monolayer material composed of carbon atoms with an sp 2 bond and π orbital. Graphene is a one-atomthick two-dimensional hexagonal lattice.…”

“…Although the SPCE has been used for the detection of various electroactive compounds including RhB, however, straight detection of RhB using the SPCE is rarely studied. As far as we know, only one SPCE modification for the detection of RhB has been reported …”

A designed miniature sensor for the trace level detection and degradation studies of the toxic dye Rhodamine B

“…Table 1 presents a comparison of the RhB sensing performance of our designed sensor with reported sensors. [39][40][41][42][43][44][45][46][47][48][49][50] Hence, GCE modied with functionalized multiwalled carbon nanotubes is a promising tool for the trace level detection of Rhodamine B dye.…”

Voltammetric Behaviour of Rhodamine B at a Screen-Printed Carbon Electrode and Its Trace Determination in Environmental Water Samples

“…Rhodamine B has been studied at a number of different electrode materials [28][29][30][31][32][33][34][35]. However, it is believed that this study represents the first report on the voltammetric behaviour and determination of Rhodamine B in an environmental water sample at an unmodified SPCE.…”