title: Environmental assessment of 2-mercaptobenzimidazole based on the surface plasmon resonance band of gold nanoparticles.
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.
authors: Department of Chemistry, College of Science, Shahid Chamran University, Ahvaz, 6135743135, Iran, rastegarz@yahoo.com.
authors: Saadat
authors: S
authors: Rastegarzadeh
authors: Zeinab
authors: Z
authors: Barkat Rezaei
mesh_terms: D001562:Benzimidazoles / Q000032:analysis*; D005591:Chemical Fractionation / Q000379:methods; D003124:Colorimetry; D004784:Environmental Monitoring / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D057230:Limit of Detection; D053768:Metal Nanoparticles / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D001562:Benzimidazoles; C030698:2-mercaptobenzimidazole; D006046:Gold
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