A new river sediment standard reference material

Epstein, Michael; Diamondstone, B. I.; Gills, T.E.

doi:10.1016/0039-9140(89)80089-x

Cited by 21 publications

(5 citation statements)

References 6 publications

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“…Finally, resulting dissolutions were analyzed by inductively coupled plasma‐optical emission spectrometry (ICP‐OES, Thermo Fisher Scientific iCAP 7,200). The validity of this methodology was tested by determining total Fe for two reference materials during the same run: granodiorite USGS GSP‐2 (Wilson, 1998) and river sediment SRM 2704 (Epstein et al, 1989).…”

Section: Materials Data and Methodsmentioning

confidence: 99%

Does Satellite Chlorophyll‐a Respond to Southernmost Patagonian Dust? A Multi‐year, Event‐Based Approach

et al. 2020

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Mineral aerosols may affect global climate indirectly by enhancing net primary productivity (NPP) upon deposition to the oceans and associated atmosphere‐to‐ocean CO2 flux. This mechanism is hypothesized to have contributed significantly to the last interglacial‐to‐glacial climatic transition. However, the dust‐NPP connection remains contentious for the present‐day climate system. We analyze the impact of southernmost Patagonian dust emissions on southwestern Atlantic Ocean continental shelf and proximal open ocean satellite chlorophyll‐a concentration. We use the first decadal time series of surface dust mass flux in southern Patagonia, along with in situ visibility data, to model dust emission, transport, and deposition to the ocean. We then perform a dust event‐based analysis of chlorophyll‐a time series, using a novel approach by which time series are corrected for post‐depositional particle advection due to ocean currents. Finally, we performed chemical analysis of iron in dust samples, a key micronutrient limiting phytoplankton biomass in high‐nutrient, low‐chlorophyll oceans such as offshore of the 200‐m isobath off Patagonia. We find no compelling evidence for an influence of dust as an enhancer of phytoplankton biomass either on shelf or proximal open ocean waters of the southwestern Atlantic Ocean. For open ocean waters this is consistent with a lack of source‐inherited bioavailable iron in dust samples. Future case studies addressing similar questions should concentrate on dust sources with identified high contents of bioavailable iron, particularly in the Southern Hemisphere where atmospheric processing of iron is weak.

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Section: Materials Data and Methodsmentioning

confidence: 99%

Does Satellite Chlorophyll‐a Respond to Southernmost Patagonian Dust? A Multi‐year, Event‐Based Approach

et al. 2020

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“…In the vortexing and aliquoting procedure, six 10-mg samples were weighed into plastic test tubes, and two aliquots of each slurry were removed and weighed into autosampler cups. Lead and manganese were chosen as the test elements, since lead was reported by isotope dilution mass spectrometry to be inhomogeneous in SRM 2704, while manganese had been shown to be homogeneous to better than 0.4% RSD for a 1-g sample size by X-ray fluorescence (XRF) (2,3).…”

Section: Methodsmentioning

confidence: 99%

“…All of the above methods have the drawback that they require physical invasion of the process with some sort of probe or sampling device. In a review on the current status of process analysis, the potential of remote, noninvasive methodologies was described (3). One particularly promising approach to noninvasive analysis involves the use of shortwavelength near-infrared (SW-NIR) spectroscopy in the wavelength region 700-1150 nm. This technique has the following advantages: (a) Measurements can be made remotely through quartz windows, using fiber optics to guide the light to and from the window; (b) path lengths can be long (many centimeters); (c) scanning fiber-optic spectrophotometers are available that are rugged, small, and relatively inexpensive (4); (d) signal-to-noise ratios are very high; and (e) good quantitative results are obtained on highly scattering samples.…”

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confidence: 99%

Automated slurry sample introduction for analysis of a river sediment by graphite furnace atomic absorption spectrometry

Epstein¹,

Carnrick²,

Slavin³

et al. 1989

Anal. Chem.

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A prototype automated slurry sample Introduction (SSI) system Is used with a graphite furnace atomic absorption spectrometer (GFAAS) and Zeeman-effect background correction to determine lead, manganese, arsenic, and Iron In a standard reference material (SRM) river sediment (SRM 2704). Different methods of slurry preparation are tested, optimum analysis parameters are determined, and sources of variability In the GFAAS measurements are characterized. Measurement variability Is found to Increase In proportion to the percent of analyte not extracted into the aqueous phase of the slurry solution and Is highly dependent on the homogeneity of analyte distribution In the sample. Analytical results for the four elements determined In SRM 2704 are In good agreement with certified values and confirm the utility of SSI combined with GFAAS for analysis of a complex matrix.

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“…Certified standard reference materials (SRM), Buffalo River sediment (SRM 2704;Epstein et al, 1989) were analysed every 10 samples during analysis. Following air drying, dried sediment was sub-sampled for analysis at 23 intervals within the top 10 cm of the core.…”

Section: Trace Elements and Metalsmentioning

confidence: 99%

“…Samples were then analysed for trace and major elements using a Spectro X-Lab 2000 energy dispersive X-ray fluorescence spectrometer (ED-XRF) with a Si(Li) semiconductor detector in the Department of Geography at UCL. Certified standard reference materials (SRM), Buffalo River sediment (SRM 2704;Epstein et al, 1989) were analysed every 10 samples during analysis. Accuracy of standards was within 10%.…”

Section: Trace Elements and Metalsmentioning

confidence: 99%

Diatom community responses to long‐term multiple stressors at Lake Gusinoye, Siberia

Adams

Peng

Shchetnikov

et al. 2019

Geography and Environment

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Global freshwater systems are threatened by multiple anthropogenic stressors via impacts on ecological structure and function necessary to maintain their health. In order to properly manage freshwater ecosystems, we must have a better understanding of the ecological response to human-induced stressors, especially in multiple stressor environments. When long-term observational records are scarce or non-existent, paleolimnology provides a means to understanding ecological response to long-term stress. Lake Gusinoye is a large, deep lake in continental southeast Siberia, and has been subject to multiple human-induced stressors since the 19th century. Diatom assemblages since the late 17th century were reconstructed from a Lake Gusinoye sediment core to increase our understanding of the response of primary producer communities to centuries of environmental change.Records of anthropogenic contamination of Lake Gusinoye (as indicated by spheroidal carbonaceous particle, trace metal, and element records) indicate increases in regional and local development c. 1920. Diatom assemblages were initially dominated by Aulacoseira granulata, which declined beginning in the 18th century, likely as a response to hydrological change in the Gusinoye basin due to regional climate warming following the termination of the Little Ice Age (LIA). Significant diatom compositional turnover was observed since the 19th century at Lake Gusinoye. Since the early 20th century, Lake Gusinoye diatom assemblages have changed more profoundly as a result of multiple anthropogenic stressors, including nutrient influx, aquaculture, and wastewater discharge from the Gusinoozersk State Regional Power Plant. Recent diatom assemblages are dominated by Lindavia ocellata and nutrient-rich species, including Fragilaria crotonensis and Asterionella formosa. Evidence of continued nutrient enrichment at Lake Gusinoye is likely due to aquaculture in the lake, and suggests potential interactive effects of warming regional temperatures and increasing nutrients (eutrophication).

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A new river sediment standard reference material

Cited by 21 publications

References 6 publications

Does Satellite Chlorophyll‐a Respond to Southernmost Patagonian Dust? A Multi‐year, Event‐Based Approach

Does Satellite Chlorophyll‐a Respond to Southernmost Patagonian Dust? A Multi‐year, Event‐Based Approach

Automated slurry sample introduction for analysis of a river sediment by graphite furnace atomic absorption spectrometry

Diatom community responses to long‐term multiple stressors at Lake Gusinoye, Siberia

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