Flow injection determination of hydrogen peroxide using catalytic effect of cobalt(II) ion on a dye formation reaction

Kurihara, Makoto; Muramatsu, Miyuki; Yamada, Mari; Kitamura, Naoya

doi:10.1016/j.talanta.2012.01.006

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…These results are similar to those of our previous report, suggesting that Au 3+ , Pt 4+ , and Pb 2+ could be deposited on the Au NPs. 43 Free Co 2+ has been shown to react with H 2 O 2 and substrates, 44 causing interference of the AR-Pt 0.1 /Au NPs in sensing of mercury ions. Next, we investigated the effects of masking reagents -PAA [Fig.…”

Section: Selectivity and Sensitivitymentioning

confidence: 99%

Detection of mercury ions based on mercury-induced switching of enzyme-like activity of platinum/gold nanoparticles

et al. 2012

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In this study, bimetallic platinum/gold nanoparticles (Pt/Au NPs) were found to exhibit peroxidase-like activity, and the deposition of mercury was found to switch the enzymatic activity to a catalase-like activity. Based on this phenomenon, we developed a new method for detecting mercury ions through their deposition on bimetallic Pt/Au NPs to switch the catalytic activity of Pt/Au NPs. Pt/Au NPs could be easily prepared through reduction of Au(3+) and Pt(4+) by sodium citrate in a one-pot synthesis. The peroxidase catalytic activity of the Pt/Au NPs was controlled by varying the ratios of Pt to Au. The Pt(0.1)/Au NPs (prepared with a [Au(3+)]/[Pt(4+)] molar ratio of 9.0/1.0) showed excellent oxidation catalysis for H(2)O(2)-mediated oxidation of Amplex® Red (AR) to resorufin. The oxidized product of AR, resorufin, fluoresces more strongly (excitation/emission wavelength maxima ca. 570/585 nm) than AR alone. The peroxidase catalytic activity of Pt(0.1)/Au NPs was switched to catalase-like activity in the presence of mercury ions in a 5.0 mM tris(hydroxymethyl)aminomethane (Tris)-borate solution (pH 7.0) through the deposition of Hg on the particle surfaces owing to the strong Hg-Au metallic bond. The catalytic activity of Hg-Pt(0.1)/Au NPs is superior (by at least 5-fold) to that of natural catalase (from bovine liver). Under optimal solution conditions [5.0 mM Tris-borate (pH 7.0), H(2)O(2) (50 mM), and AR (10 μM)] and in the presence of the masking agents polyacrylic acid and tellurium nanowires, the Pt(0.1)/Au NPs allowed the selective detection of inorganic mercury (Hg(2+)) and methylmercury ions (MeHg(+)) at concentrations as low as several nanomolar. This simple, fast, and cost-effective system enabled selective determination of the spiked concentrations of Hg(2+) and MeHg(+) in tap, pond, and stream waters.

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Section: Selectivity and Sensitivitymentioning

confidence: 99%

Detection of mercury ions based on mercury-induced switching of enzyme-like activity of platinum/gold nanoparticles

et al. 2012

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“…It has a very important role in many fields, such as industrial chemistry, biochemistry, clinical chemistry, atmospheric chemistry, and analytical chemistry (Kurihara et al 2012). Hydrogen peroxide bleaching of pulp is a fairly well known technology (Brogdon and Hart 2012;Heimburger 2012).…”

Section: Introductionmentioning

confidence: 99%

Headspace Gas Chromatographic Method for the Determination of Hydrogen Peroxide Residues in Bleaching Effluent

Liu¹,

Zhang²,

Zhan³

2014

BioResources

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A simple, rapid, accurate, and practical headspace gas chromatographic method is proposed for the determination of hydrogen peroxide residues in bleaching effluent. This method is based on the reaction of hydrogen peroxide with ceric sulfate, under acidic conditions, where hydrogen peroxide is converted to oxygen, which is then measured using headspace gas chromatography (HS-GC) coupled with a thermal conductivity detector (TCD). The results show that a complete conversion of hydrogen peroxide to oxygen can be achieved within 3 min at a temperature of 70 °C and a H2SO4 concentration of 0.2 M. Under optimized conditions, the method has an excellent measurement precision (relative standard deviation = 0.78%) and good recovery (100.2 ± 2.6%). Meanwhile, the present method does not require the use of organic reagents.

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A novel bimediator amperometric sensor for electrocatalytic oxidation of gallic acid and reduction of hydrogen peroxide

Sangeetha

Narayanan

2014

Analytica Chimica Acta

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Flow injection determination of hydrogen peroxide using catalytic effect of cobalt(II) ion on a dye formation reaction

Cited by 6 publications

References 28 publications

Detection of mercury ions based on mercury-induced switching of enzyme-like activity of platinum/gold nanoparticles

Detection of mercury ions based on mercury-induced switching of enzyme-like activity of platinum/gold nanoparticles

Headspace Gas Chromatographic Method for the Determination of Hydrogen Peroxide Residues in Bleaching Effluent

A novel bimediator amperometric sensor for electrocatalytic oxidation of gallic acid and reduction of hydrogen peroxide

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