Search Results - "Heumann, K G"

Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide by Ziska, F, Quack, B, Abrahamsson, K, Archer, S. D, Atlas, E, Bell, T, Butler, J. H, Carpenter, L. J, Jones, C. E, Harris, N. R. P, Hepach, H, Heumann, K. G, Hughes, C, Kuss, J, Krüger, K, Liss, P, Moore, R. M, Orlikowska, A, Raimund, S, Reeves, C. E, Reifenhäuser, W, Robinson, A. D, Schall, C, Tanhua, T, Tegtmeier, S, Turner, S, Wang, L, Wallace, D, Williams, J, Yamamoto, H, Yvon-Lewis, S, Yokouchi, Y

“…Volatile halogenated organic compounds containing bromine and iodine, which are naturally produced in the ocean, are involved in ozone depletion in both the…”
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Reactive and organic halogen species in three different European coastal environments by Peters, C., Pechtl, S., Stutz, J., Hebestreit, K., Hönninger, G., Heumann, K. G., Schwarz, A., Winterlik, J., Platt, U.

“…We present results of three field campaigns using active longpath DOAS (Differential Optical Absorption Spectroscopy) for the study of reactive halogen species…”
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Validation of Methylmercury Determinations in Aquatic Systems by Alkyl Derivatization Methods for GC Analysis Using ICP-IDMS by Demuth, Natascha, Heumann, Klaus G

“…Isotope dilution mass spectrometry (IDMS), using an inductively coupled plasma quadrupole mass spectrometer (ICPMS) and a species-specific methylmercury spike…”
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Boron Isotope Application for Tracing Sources of Contamination in Groundwater by Vengosh, A, Heumann, K. G, Juraske, S, Kasher, R

“…A study showed that anthropogenic boron in waste is isotopically distinct from natural boron in groundwater, seawater and marine-derived brines and thus…”
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Isotope dilution inductively coupled plasma quadrupole mass spectrometry in connection with a chromatographic separation for ultra trace determinations of platinum group elements (Pt, Pd, Ru, Ir) in environmental samples by Müller, M, Heumann, K G

“…An isotope dilution inductively coupled plasma quadrupole mass spectrometric (ID-ICP-QMS) method was developed for the simultaneous determination of the…”
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Production of methylated mercury, lead, and cadmium by marine bacteria as a significant natural source for atmospheric heavy metals in polar regions by Pongratz, Richard, Heumann, Klaus G.

“…Mixed and pure bacterial cultures of polar origin were incubated in model experiments under polar conditions. The releasing rates of monomethyl and dimethyl…”
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Transformation of Iodide in Natural and Wastewater Systems by Fixation on Humic Substances by Rädlinger, Gunther, Heumann, Klaus G

“…Separation of different fractions of humic substances (HS) by their molecular weight was carried out by size exclusion chromatography (SEC). The fixation of…”
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Two-dimensional on-line detection of brominated and iodinated volatile organic compounds by ECD and ICP-MS after GC separation by Schwarz, A, Heumann, K G

“…Inductively coupled plasma-mass spectrometry (ICP-MS) was coupled to a gas chromatographic (GC) system with electron capture detector (ECD), which enables…”
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Determination of trace elements in quartz glass by use of LINA-Spark–ICP–MS as a new method for bulk analysis of solid samples by Tibi, Markus, Heumann, K. G.

“…The determination of trace elements in pure quartz glass samples has been performed by coupling an ICP quadrupole mass spectrometer with the…”
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Determination of boron isotopic variations in aquatic systems with negative thermal ionization mass spectrometry as a tracer for anthropogenic influences by Eisenhut, S, Heumann, K G, Vengosh, A

“…A technique for precise boron isotope ratio measurements with a high detection power has been developed by negative thermal ionization mass spectrometry…”
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Production of methylated mercury and lead by polar macroalgae — A significant natural source for atmospheric heavy metals in clean room compartments by Pongratz, R., Heumann, K.G.

“…During August and September 1995 samples of different species of macroalgae were collected from the Kongsfjord on Spitsbergen. These macroalgae were cultivated…”
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Determination of Heavy Metal Interactions with Dissolved Organic Materials in Natural Aquatic Systems by Coupling a High-Performance Liquid Chromatography System with an Inductively Coupled Plasma Mass Spectrometer by Rottmann, Lothar, Heumann, Klaus G

“…A high-performance liquid chromatographic system with a size exclusion column is coupled with an inductively coupled plasma mass spectrometer for determining…”
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Iodine Determination in Food Samples Using Inductively Coupled Plasma Isotope Dilution Mass Spectrometry by Rädlinger, Gunther, Heumann, Klaus G

“…Two different sample treatment methods are used in connection with inductively coupled plasma isotope dilution mass spectrometry for accurate and precise…”
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Determination of dissolved selenium species in environmental water samples using isotope dilution mass spectrometry by Tanzer, Dieter, Heumann, Klaus G

“…In order to clarify the species composition of selenium in environmental water samples, analytical methods have been developed for the selective determination…”
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Producing SI-traceable reference values for Cd, Cr and Pb amount contents in polyethylene samples from the Polymer Elemental Reference Material (PERM) project using isotope dilution mass spectrometry by VOGL, J, LIESEGANG, D, OSTERMANN, M, DIEMER, J, BERGLUND, M, QUETEL, C. R, TAYLOR, P. D. P, HEUMANN, K. G

“…The present paper describes the certification of the amount content of Cd, Cr and Pb in two different polyethylene materials within the third phase of the…”
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Determination of Monomethylcadmium in the Environment by Differential Pulse Anodic Stripping Voltammetry by Pongratz, Richard, Heumann, Klaus G

“…A differential pulse anodic stripping voltammetric (DPASV) method was used to differentiate between the cadmium species Cd2+ and MeCd+ (Me = methyl) in aquatic…”
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Effect of calcium supplements and stage of lactation on the calcium absorption efficiency of lactating women accustomed to low calcium intakes by Fairweather-Tait, S, Prentice, A, Heumann, KG, Jarjou, LM, Stirling, DM, Wharf, SG, Turnlund, JR

“…The effect of calcium intake on the calcium absorption efficiency from 100 mL cow milk was measured in lactating Gambian mothers habituated to a low-calcium…”
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Determination of Concentration Profiles of Methyl Mercury Compounds in Surface Waters of Polar and other Remote Oceans by GC-AFD by Pongratz, Richard, Heumann, Klaus G.

“…The concentration of monomethyl mercury (MeHg + ) and dimethyl mercury (Me 2 Hg) was determined in surface sea-water samples of the Antarctic and Arctic Ocean…”
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Development of an ICP-IDMS method for accurate routine analyses of toxic heavy metals in polyolefins and comparison with results by TI-IDMS by Diemer, J, Heumann, K G

“…An inductively coupled plasma isotope dilution mass spectrometric (ICP-IDMS) method was developed as a suitable method - with respect to its sensitivity,…”
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Simultaneous multi-species determination of trimethyllead, monomethylmercury and three butyltin compounds by species-specific isotope dilution GC-ICP-MS in biological samples by Poperechna, Nataliya, Heumann, Klaus G

“…An accurate and sensitive multi-species species-specific isotope dilution GC-ICP-MS method was developed for the simultaneous determination of trimethyllead…”
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