High throughput sample introduction system for the analysis of drinking waters and wastewaters by ICP-MS

Mahar, Maura; Tyson, Julian F.; Neubauer, Kenneth R.; Grosser, Zoe

doi:10.1039/b800599k

Cited by 25 publications

(16 citation statements)

References 63 publications

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“…At the beginning of each measurement session, the instrument was first tuned to produce maximum sensitivity and stability while also maintaining low oxide formation (UO/U ≤ 5 %). In order to minimize analytical time and sample volume, we worked with the SC-FAST automation system coupled to a cyclonic spray chamber (Mahar et al, 2008). A six-port valve rapidly delivers the sample with a high-flow vacuum pump and rinses the probe sample lines while the sample is analyzed.…”

Section: Det Preservation and Analysesmentioning

confidence: 99%

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

et al. 2014

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Abstract. Long-term experimental studies suggest that, under transient anoxic conditions, redox fronts within the sediment shift upwards, causing sequential rise and fall of benthic fluxes of reduced species (Mn(II), Fe(II) and S(-II)). Infaunal benthic organisms are associated with different redox fronts as micro-habitats and must be affected by such changes during natural hypoxia events. In order to document the geochemical evolution of the sediment during prolonged anoxia in the framework of an in situ experiment designed to mimic natural conditions, benthic chambers were deployed on the seafloor of the Northern Adriatic and sampled after 9, 30 and 315 days of incubation. Oxygen and sulfide were measured continuously in the early stages (9 days) of the experiment. High-resolution pore water profiles were sampled by DET probes and redox-sensitive species (S(VI), Mn(II) and Fe(II)) and alkalinity were measured.Starting oxygen saturation was about 80 % within the chamber. After 7 days, anoxia was established in the bottom waters within the chambers. Mn(II) and Fe(II) started diffusing towards the anoxic water column until they reached the surficial sediment. Being reoxidized there, Mn and Fe reprecipitated, giving a rusty coloration to the seafloor. Infaunal species appeared at the sediment surface. After 20 days, all macro-organisms were dead. Decomposition of macroorganisms at the sediment-water interface generated S(-II) within the entire height of the chamber, leading to a downward flux of sulfides into the sediment, where they were quickly oxidized by metallic oxides or precipitated as FeS. S(-II) was below detection in the water column and pore waters at the end of the experiment. Our results suggest that S(-II) enrichment in the water column of coastal systems, which are episodically anoxic, is strongly controlled by the biomass of benthic macrofauna and its decay during anoxia, whereas its residence time in the water column is controlled by iron availability (as solid oxides or as dissolved reduced cations) within the sediment, even without water circulation.

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Section: Det Preservation and Analysesmentioning

confidence: 99%

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

et al. 2014

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“…Samples with high halogen (Br, I) and B concentrations can produce a critical memory effect, which reduces the sensitivity and Au solutions were compared. Figure 3 showed that the amount of Bi adsorbed by the sample introduction system was much larger than the amount of Sb adsorbed by the memory effect of Hg (20,21). We compared the washing effects of 0.5% NH 3 .…”

Section: Elimination Of Memory Effects Of B Br and Imentioning

confidence: 98%

Elimination of Memory Effects and Simultaneous Determination of B, Br, I, Hg, Bi, and Sb in Groundwater Samples by Inductively Coupled Plasma Mass Spectrometry

Zhang¹,

Guo²

2014

At.Spectrosc.

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“…At the beginning of each measurement session, the instrument was first tuned to produce maximum sensitivity and stability while also maintaining low oxide formation (UO/U ≤ 5 %). In order to min-imize analytical time and sample volume, we worked with the SC-FAST automation system coupled to a cyclonic spray chamber (Mahar et al, 2008). A six-port valve rapidly delivers the sample with a high-flow vacuum pump and rinses the probe sample lines while the sample is analyzed.…”

Section: Det Preservation and Analysesmentioning

confidence: 99%

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

Metzger¹,

Langlet²,

Viollier³

et al. 2013

Preprint

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Long term experimental studies suggest that, under anoxic transient conditions, redox fronts within the sediment shift upwards causing sequential rise and fall of benthic fluxes of reduced species (Mn(II), Fe(II) than S(−II)). Infaunal benthic organisms are associated to different redox fronts as micro-habitats and must be affected by such changes during natural hypoxia events. In order to document geochemical evolution of the sediment during prolonged anoxia in a realistic system, benthic chambers were deployed on the seafloor of the Northern Adriatic and sampled after 9, 30 and 315 days of incubation. Oxygen and sulfide were measured continuously in the early stages of the experiment (during 9 days). High-resolution porewater profiles were sampled by DET probes and redox sensitive species were analysed (alkalinity, SO₄^2–, Mn²⁺, Fe²⁺).

After 7 days, anoxia was reached within the chambers. Mn and Fe started diffusing towards the water column giving a rusty color to the seafloor. Infaunal species appeared at the surface. After 20 days, all macro-organisms were dead. Macro-organisms decomposition laying on the seafloor generated important production of sulfides within the chamber generating a downward flux of sulfide towards the sediment where sulfides were quickly oxidized by metallic oxides or precipitated as FeS. Sulfide was no more detectable in the water column and porewaters at the end of the experiment. Therefore, our results suggest that sulfide enrichment in the water column in coastal systems is strongly controlled by the biomass of benthic macrofauna and its decay during hypoxia while its residence time in water column is controlled by iron content (as solid oxides or as dissolved reduced cation) within the sediment, even without water circulation

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High throughput sample introduction system for the analysis of drinking waters and wastewaters by ICP-MS

Cited by 25 publications

References 63 publications

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

Elimination of Memory Effects and Simultaneous Determination of B, Br, I, Hg, Bi, and Sb in Groundwater Samples by Inductively Coupled Plasma Mass Spectrometry

Artificially induced migration of redox layers in a coastal sediment from the Northern Adriatic

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