Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Wolfgang Frech"'
Publikováno v:
PLoS ONE, Vol 8, Iss 5 (2013)
Externí odkaz:
https://doaj.org/article/661e8957780d4d45a2d0f085d492e03c
Publikováno v:
PLoS ONE, Vol 7, Iss 9, p e45547 (2012)
In this paper we investigate the hypothesis that long-term sulphate (SO(4) (2-)) deposition has made peatlands a larger source of methyl mercury (MeHg) to remote boreal lakes. This was done on experimental plots at a boreal, low sedge mire where the
Externí odkaz:
https://doaj.org/article/8a4721fcfb7b4ba1a4b0113dceb30d69
Publikováno v:
ACS Earth and Space Chemistry. 2:1022-1028
Mercury (Hg) is present in petrochemical samples, including crude oils, and the processing and use of petroleum products contribute to global Hg emissions. We present a refined theory on geochemica ...
SYNTHESIS AND STORAGE OF SINGLE PHENYLTIN COMPOUNDS SYNTHESIZED FROM ISOTOPICALLY ENRICHED TIN METAL
Publikováno v:
Science and Technology Development Journal. 12:42-54
A method combining liquid liquid extraction and chromatographic fractionation has been developed for the preparation of pure monophenyltin (MPT), diphenyltin (DPhT), and triphenyltin (TPhT), synthesized from isotope enriched Sn-metal using phenylatio
Autor:
G P Glasby, J. Geldon, J. Warzocha, Piotr Szefer, Wolfgang Frech, Ross M. Renner, Erik Björn, James Snell
Publikováno v:
Environmental Geology. 57:847-862
Analysis of 59 surface sediment samples from the Polish exclusive economic zone (EEZ) shows that Szczecin Lagoon sediments are the most polluted by heavy metals and that the degree of heavy-metal pollution decreases substantially on passing from the
Publikováno v:
ISIJ International. 46:1858-1864
Computer-controlled facilities for continuous casting of metallic fibres and wires performing in-rotating-liquid-spinning (INROLISP) and shape flow casting (SFC) were designed and installed to determine and control the near-net-shape casting processe
Autor:
Roberto Morabito, Ofx Donard, Ryszard Lobinski, Tom Larsson, S. Bøwadt, Michele Bianchi, H Muntau, Ph. Quevauviller, Shona McSheehy, F Pannier, Wolfgang Frech, Martine Potin-Gautier, Carmen Cámara, Paolo Massanisso, Kjm Kramer, B.M. Gawlik
Publikováno v:
Trends in Analytical Chemistry
Trends in Analytical Chemistry, Elsevier, 2004, 23 (9), pp.664--676. ⟨10.1016/j.trac.2004.06.004⟩
Trends in Analytical Chemistry, Elsevier, 2004, 23 (9), pp.664--676. ⟨10.1016/j.trac.2004.06.004⟩
International audience; Increasing awareness of the determination of chemical species in the environment evolves jointly with the need to control the validity of analytical measurements in a wide variety of matrices. There are few Certified Reference
Autor:
Wolfgang Frech, I Grinshtein, K. Yu. Nagulin, Marat Gafurov, Erik Björn, A. Trenin, L Vasilieva, Gerd Hermann, A. Kh. Gil'mutdinov, R Matz
Publikováno v:
SCOPUS05848547-2004-59-5-SID2342642059
This paper has been withdrawn by the author because of copyright reasons.
This paper has been withdrawn
This paper has been withdrawn
Species-Specific Isotope Dilution with Permeation Tubes for Determination of Gaseous Mercury Species
Autor:
Tom Larsson, Wolfgang Frech
Publikováno v:
Analytical Chemistry. 75:5584-5591
Instrumentation and methodology for determination of the gaseous mercury species Hg0, (CH3)2Hg, and CH3Hg+ has been developed. The method is based on continuous addition of gaseous isotopically enriched Hg species (tracers) at the point of sample acq
Publikováno v:
Biogeochemistry. 64:53-76
Concentrations of methyl mercury, CH3Hg (II), total mercury, Hgtot = CH3Hg (II) + Hg (II), and organic sulphur species were determined in soils, soil solutions and streams of a small (50 ha) boreal forest catchment in northern Sweden. The CH3Hg (II)/