Abstract
A colorimetric assay method is described for the environmental detection of 2-mercaptobenzimidazole (MBI) using surface plasmon resonance of gold nanoparticles (AuNPs). Stable and dispersed AuNPs with intensified plasmon resonance were prepared in situ using a simple, rapid, and eco-friendly procedure by applying ascorbic acid as a reducer and cetyltrimethylammonium bromide as a stabilizer. The presence of MBI has a strong effect on the plasmon absorbance of AuNPs, which was employed for the detection of MBI. The calibration curve was linear in the range of 1.0 × 10−6–5.5 × 10−5 mol/L of MBI; the detection limit was 8.4 × 10−7 mol/L. The relative standard deviations for eight replicate measurements of 3.0 × 10−6 and 5 × 10−5 mol/L MBI were 3.9 and 1.4 %, respectively. The method was successfully applied to the determination of MBI in tap, river, sea, and heat exchanger cooling water samples.
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The authors are grateful to the Shahid Chamran University Research Council for financial support of this work (grant 1391).
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Rastegarzadeh, S., Barkat Rezaei, Z. Environmental assessment of 2-mercaptobenzimidazole based on the surface plasmon resonance band of gold nanoparticles. Environ Monit Assess 185, 9037–9042 (2013). https://doi.org/10.1007/s10661-013-3233-0
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DOI: https://doi.org/10.1007/s10661-013-3233-0