A Sensitive Hydride Generation-Nanogold Spectrophotometric Method for Trace As(III)

Abstract

In H2SO4 solution, the arsenic was reduced to arsine (AsH3) by NaBH4, and absorbed by solution of H3PO4-HAuCl4-NH4SCN-gum arabic. The Au3+ was reduced to nanogold, which led to the absorption value at 555nm increased. Under the selected conditions, the value was linear to the concentration of As (III) in the range of 0.07-1.10 μg/mL, a detection limit of 0.03 μg/mL. The proposed method was applied to detect As (III) in water samples, with satisfactory results.

A new SERS strategy for quantitative analysis of trace microalbuminuria based on immunorecognition and graphene oxide nanoribbon catalysis

“…[1][2][3][4] In analytical chemistry, catalysis such as molecular reaction and nanoparticle reaction can be used to amplify signals to enhance sensitivity and have been utilized in absorption, fluorescence, resonance Rayleigh scattering (RRS), and surface-enhanced Raman scattering (SERS). [5][6][7][8] A label-free DNAzyme-cleaving fluorescence method was developed for the determination of trace Pb 2+ based on the catalysis of AuPd nanoalloy on the reduction of rhodamine 6G. 5 Qu et al reported a colorimetric platform for visual detection of 0.1-10 ng/mL cancer biomarker based on intrinsic peroxidase activity of graphene oxide (GO).…”

“…[5][6][7][8] A label-free DNAzyme-cleaving fluorescence method was developed for the determination of trace Pb 2+ based on the catalysis of AuPd nanoalloy on the reduction of rhodamine 6G. 5 Qu et al reported a colorimetric platform for visual detection of 0.1-10 ng/mL cancer biomarker based on intrinsic peroxidase activity of graphene oxide (GO). 6 He et al prepared Au@Pt nanorods, which showed multiple enzyme properties and were used for spectrophotometric determination of 4.5×10 -5 -1×10 -3 mol/L glucose (Glu).…”