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TABLE OF CONTENTS
Volume 21 Issue 6 , Pages 379 - 474 (June 2007)
Special Issue: Special Environmental Issue Including Papers presented at the 7th ICEBAMO Meeting, Heraklion, Greece
Editorial
Editorial (p 379)
Peter Craig
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1258
Preface
Preface: 7th International Conference on Environmental and Biological Aspects of Main-Group Organometals (ICEBAMO), Heraklion, Crete, Greece, 2006 (p 380)
Spiros A. Pergantis, Helle R. Hansen
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1286
Speciation Analysis and Environment
Arsenic and selected elements in marine angiosperms, south-east coast, NSW, Australia (p 381-395)
Danielle Thomson, William Maher, Simon Foster
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1229
The leaves of four angiosperm species, the mangrove Avicennia marina, the samphire Sarcocornia quinqueflora, the seablight Suaeda australis and the seagrass Posidonia australis, were sampled from three locations from the south-east coast of NSW, Australia. Arsenic concentrations were significantly different between species and locations but were consistently low compared with marine species. Uptake of arsenic appears to be dependent on iron uptake but not phosphorus uptake. Marine angiosperms mainly cycle inorganic arsenic with little biomethylation of arsenic occurring. | |
Arsenic and selected elements in inter-tidal and estuarine marine algae, south-east coast, NSW, Australia (p 396-411)
Danielle Thomson, William Maher, Simon Foster
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1231
Arsenic cycling was examined in the marine inter-tidal and estuarine algae from the south-east coast, NSW, Australia. Distinct differences between algal classes were found for the proportion of arsenic species present in the lipid and water-soluble fractions, with green algae having a higher proportion of arsenic in lipids (19-44%) than red inter-tidal (5-34%) or estuarine algae (10-24%). The presence of dimethylated arsenoribose-based arsenolipids in marine algae may be precursors for arsenobetaine, via intermediates previously identified in marine organisms. | |
Determination of migration of n-butyltins and n-octyltins to food simulants by gas chromatography-mass spectrometry (p 412-424)
Sophia D. Papaspyrou, Nikolaos S. Thomaidis, Eugenia N. Lampi, Alexandros Lioupis
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1235
A GC-MS method for the determination of migration of organotins in aqueous food simulants was developed and validated. Ethylation conditions were optimized. TPrT and DHT were used as internal standards for butyl- and octyltin compounds, respectively. The stability of the organotins during migration tests is reported. | |
A screening method for the determination of toluene extractable organotins in water samples by electrothermal atomic absorption spectrometry and rhenium as chemical modifier (p 425-433)
Nikolaos S. Thomaidis, Athanasios S. Stasinakis, Themistokles D. Lekkas
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1236
A simple and cost-effective screening method for the determination of the toluene extractable organotin compounds by ETAAS, using Re as chemical modifier, is described. | |
First approach of a methodological set-up for selenomethionine chiral speciation in breast and formula milk using high-performance liquid chromatography coupled to atomic fluorescence spectroscopy (p 434-440)
J. L. Gómez-Ariza, V. Bernal-Daza, M. J. Villegas-Portero
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1239
Chiral speciation of selenomethionine is a challenge in food and health fields due to selenium importance during infant nutrition. The use of the coupling HPLC-MAD-HG-AFS, based on atomic fluorescence detector, is suitable for routine selenium chiral especiation of human and formula milk. Sample pretreatment based on ultrafiltration clean-up and solid phase preconcentration is necessary for reliable analysis of these samples. | |
Particle size distribution of organometal(loid) compounds in freshwater sediments (p 441-446)
Lars Duester, Louise M. Hartmann, Lisa Luemers, Alfred V. Hirner
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1234
The aim of this study was to determine to what extent particle size determines the occurrence of organometal(loid) compounds of the elements As, Sb, Sn and Te in freshwater sediments. The concentration of monomethylated metal(loid)s was up to 100-fold higher than those of higher methylated species. The highest concentration of organometal(loid) species was always detected in the sediment fractions that contained the highest concentration of humic substances and comprised up to 40% clays and silt particles (<63 µm). | |
Determination of arsenic species and arsenosugars in marine samples by HPLC-ICP-MS (p 447-454)
Shizuko Hirata, Hideki Toshimitsu
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1248
Arsenic speciation analysis in marine samples was performed using high pressure liquid chromatography (HPLC) with ICP-MS detection. The separations of arsenic species and arsenosugars in the extracts from marine samples were achieved on a Shiseido Capcell Pak C18 column and a Hamilton PRP X-100 anion-exchange column using 20 mM ammonium hydrogen carbonate solution (pH 8.4). The concentrations of arsenosugars in algae were in the range 3.6-27.5 µg g-1, which were accounted for 6.0-34.9% of total arsenic. | |
Equilibria involved in the diorganotin(IV) and triorganotin(IV) phosphomycin interaction in aqueous solution (p 455-461)
Girolamo Casella, Tiziana Fiore, Mahmoud M. A. Mohamed, László Nagy, Claudia Pellerito, Lorenzo Pellerito, Silvio Sammartano, Michelangelo Scopelliti
Published Online: Apr 18 2007 9:27AM
DOI: 10.1002/aoc.1220
Dimethyltin(IV) and trimethyltin(IV)-phosphomycinate complex formation equilibria were studied in aqueous solution using UV-vis spectroscopy and ISE-H+ potentiometry, at 25 °C and 0.1 mol l-1 ionic strength. | |
Methylation of inorganic mercury by methylcobalamin in aquatic systems (p 462-467)
Baowei Chen, Thanh Wang, Yongguang Yin, Bin He, Guibin Jiang
Published Online: Apr 3 2007 5:17AM
DOI: 10.1002/aoc.1221
Phenols were converted into the aryl diethyl phosphates (II). Reaction of II with sodium trimethylstannide in liquid ammonia leads to the corresponding aryl- and heteroarylpoly(trimethylstannyl) derivatives (III). Organotins III react with borane in THF to give arylpolyboronic acids IV in ca 80% yield. The valuable arylboronic acids are obtained pure and uncontaminated by organotin residues and by other organic and inorganic boron derivatives as well as free of organic halides. | |
Trace element distribution and species fractionation in Brassica napus plant (p 468-474)
Oto Mestek, Jan Polák, Martin Ju
í
ek, Pavlaarvánková, Richardoplík, Jií 
antrûek, Milanodíek
Published Online: May 23 2007 4:39AM
DOI: 10.1002/aoc.1237
The research was concerned with trace elements status in individual parts of the rape plant: roots, shoots and seeds. | |