The formation of zirconium hexacyanoferrate(ii) nanoparticles and their application in the highly sensitive determination of dopamine based on enhanced resonance Rayleigh scattering

Abstract

The formation of zirconium hexacyanoferrate(II) nanoparticles has been developed as a new resonance Rayleigh scattering (RRS) platform for the sensitive detection of trace amounts of dopamine (DA). The determination mechanism is based on dopamine reacting with hexacyanoferrate(III) ions to produce hexacyanoferrate(II) ions in acidic solution, which further react with zirconium ions to produce zirconium hexacyanoferrate(II) complexes. The zirconium hexacyanoferrate(II) complexes aggregate to form zirconium hexacyanoferrate(II) nanoparticles with an average diameter of about 50 nm. This aggregation can produce a strong RRS signal with the wavelength maximum at about 318 nm. This sensing system presented a good linear relationship between the increment of scattering intensity (DI RRS ) and the concentration of dopamine in the range of 0.03-1.3 mg mL À1 with a correlation coefficient of 0.9996 and a low detection limit (at a signal-to-noise ratio of 3) of 0.392 ng mL À1 . Furthermore, this reaction system has been applied successfully to the detection of DA in a pharmaceutical preparation, and the recoveries were between 100.78% and 104.43%.

Advanced materials for optical sensing and biosensing of neurotransmitters

“…The measured RRS signal is constant for about 24 h and the reaction time is 3 min which is suitable for rapid assay of DA. Because of reducing effect of some other catechols, AA and UA, it seems that the selectivity of the method can be challenged [109].…”

Aptasensor Based on Hierarchical Core–Shell Nanocomposites of Zirconium Hexacyanoferrate Nanoparticles and Mesoporous mFe3O4@mC: Electrochemical Quantitation of Epithelial Tumor Marker Mucin-1

“…Synthesis of the Core−Shell ZrHCF@mFe 3 O 4 @mC Nanocomposite. ZrHCF was prepared according to the procedure described by Dong et al 58 Briefly, 20 mL of HCl (0.03 mol•L −1 ) was pipetted into a 100 mL calibrated flask. Then, 40 mL of dopamine hydrochloride solution (pH 8.4), 40 mL of K 3 Fe(CN) 6 solution (2.0 g•L −1 ), and 36 mL of ZrOCl 2 solution (2.0 g•L −1 ) were added in succession under vigorous stirring for 1 h. The mixture changed gradually from light yellow to dark red and finally to dark black.…”

Determination of hydroquinone based on the formation of Turnbull's blue nanoparticles using resonance Rayleigh scattering

“…However, when the [Fe(CN) 6 ] 3À concentration was low, it was not conducive to the formation of complexes, which resulted in a lower RRS intensity. 27 Therefore, the [Fe(CN) 6 ] 3À concentration of 1.4 Â 10 À4 mol L À1 was used for further studies.…”