Determination of picomolar levels of platinum in estuarine waters: A comparison of cathodic stripping voltammetry and isotope dilution-inductively coupled plasma mass spectrometry

Obata, Hajime; Yoshida, T.; Ogawa, Hiroshi

doi:10.1016/j.aca.2006.07.044

Cited by 46 publications

(41 citation statements)

References 22 publications

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“…Studies in this matter have been conducted only in a few scientific centers. Assessing PGEs content in water samples poses a challenge due to [12,16,17,18]:…”

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confidence: 99%

Estimation of platinum in environmental water samples with solid phase extraction technique using inductively coupled plasma mass spectrometry

et al. 2009

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A solid phase extraction technique for the determination of platinum(IV) at trace levels by inductively coupled plasma mass spectromA solid phase extraction technique for the determination of platinum(IV) at trace levels by inductively coupled plasma mass spectrometry (ICP-MS) was developed. The method was based on retention of platinum in a sample on silica gel modified with aminepropyl groups. The retention of platinum(IV) from the sample solution and the recovery of platinum with 1.0 mol L−1 thiourea solution were quantitative. The relative standard deviation (RSD) was calculated as 5% (n = 7) at the 10 ng L−1 level. The enrichment factor was found to be (50-fold) for 250 mL of water sample. Under optimum conditions, the method detection limit (MDL) was found to be 1 ng L−1 for platinum in water matrices. Recoveries of Pt from spike addition to atmospheric water samples were quantitative (80–95%). The present method was used for the determination of platinum in precipitation, throughfall and runoff water samples.

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“…Studies in this matter have been conducted only in a few scientific centers. Assessing PGEs content in water samples poses a challenge due to [12,16,17,18]:…”

mentioning

confidence: 99%

Estimation of platinum in environmental water samples with solid phase extraction technique using inductively coupled plasma mass spectrometry

et al. 2009

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“…An accelerated durability test (ADT) was carried out in a chloride-containing electrolyte by a procedure described in Table S4. Dissolved Pt ion concentration was determined by stripping voltammetry on a hanging mercury drop electrode [27][28][29], as shown in Table S5. HOR examination was also carried out by cyclic voltammetry (CV) under a hydrogen atmosphere, and an OER test was conducted by CV and potential holding conditions under an argon atmosphere.…”

Section: Electrochemical Testsmentioning

confidence: 99%

Assessing the Potential of Co-Pt Bronze for Electrocatalysis in Acidic Media

2018

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An electron-conducting mixed oxide, Co-Pt bronze was synthesized and examined as a candidate for a highly durable electrocatalyst for both the polymer electrolyte fuel cells and electrolyzers. The motivation of this study comes from the fact that this material has not been studied as an electrocatalyst in acidic media, although past studies showed a high electronic conductivity and a high corrosion resistance. Co-Pt bronze without metallic Pt was obtained by solid-state synthesis and hot aqua regia rinsing. The OER activity was found to be among the highest as a material without Ir and Ru in acidic media, and it showed extremely high electrochemical stability in the OER potential range. Its oxygen reduction reaction (ORR) was obtained after potential cycles down to the hydrogen region, which formed a thin Pt metallic layer over the oxide. While its specific activity was not more than that of pure platinum nanoparticles, its durability against the potential cycles was much higher.

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“…This could be due to real variability among the ocean basins or be an artifact of the three different analytical methods used: isotope-dilution inductively coupled plasma mass spectrometry (ID-ICPMS) after anion exchange column extraction [Colodner et al, 1993], graphite furnace atomic absorption spectrometry after anion exchange column extraction [Hodge et al, 1985], and cathodic stripping voltammetry (CSV) after UV irradiation [Jacinto and van den Berg, 1989]. Recently, Obata et al [2006] showed for estuarine water samples that ID-ICPMS and CSV gave consistent results. Deep-water Pt concentrations seem to fall between 0.3 and 1 pM, but there is uncertainty as to interbasin differences [Ravizza, 2001].…”

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confidence: 99%

“…Stream samples from near the Tulameen ultramafic complex, British Columbia, Canada had 3-5 pM Pt (n = 7, median concentration: 4.2 pM) [Cook and Fletcher, 1993]. The Ara and Tama rivers which flow through Tokyo displayed high Pt concentrations (10.4 AE 0.4 pM and 31.4 AE 0.4 pM, respectively), which can be attributed to anthropogenic emissions [Obata et al, 2006]. There are also reports of unidentified rivers in Germany with concentrations 1.1-3.3 pM [Ravindra et al, 2004] and an urban river in Sweden with <10 pM [Hidalgo et al, 1996].…”

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Dissolved platinum in major rivers of East Asia: Implications for the oceanic budget

Soyol-Erdene

Huh

2012

Geochem Geophys Geosyst

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[1] Dissolved platinum concentrations of eleven large pristine river systems in East Asia ($200 samples) were determined to better constrain the oceanic platinum budget. Most samples had concentrations less than 1.4 pM; relatively high concentrations up to 5.8 pM were measured in only approximately 6% of the samples. The median Pt concentrations of the individual river systems had only a small range, from 0.18 pM (Duman) to 0.63 pM (Huang He), and the difference in Pt yield mainly resulted from the difference in runoff. The rivers draining the eastern Tibetan Plateau -the Salween, Mekong, Chang Jiang (Yangtze), Hong (Red), and Huang He (Yellow) -had higher Pt yield than the rivers of the Russian Far East -the Amur, Lena, Yana, Indigirka, and Kolyma. If the discharge-weighted mean Pt concentration of our samples (0.36 pM) is extrapolated globally, the estimated riverine flux of dissolved Pt to the ocean is 13 Â 10 3 mol y À1. Based on this riverine flux, the estimated oceanic residence time of Pt is 24 AE 10 kyrs. A 50% release and 50% uptake of Pt in estuaries would modify this to 16 kyrs and 45 kyrs, respectively.

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Determination of picomolar levels of platinum in estuarine waters: A comparison of cathodic stripping voltammetry and isotope dilution-inductively coupled plasma mass spectrometry

Cited by 46 publications

References 22 publications

Estimation of platinum in environmental water samples with solid phase extraction technique using inductively coupled plasma mass spectrometry

Estimation of platinum in environmental water samples with solid phase extraction technique using inductively coupled plasma mass spectrometry

Assessing the Potential of Co-Pt Bronze for Electrocatalysis in Acidic Media

Dissolved platinum in major rivers of East Asia: Implications for the oceanic budget

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