Results 171 to 180 of about 186,729 (218)
Some of the next articles are maybe not open access.
Arsenic Speciation of Terrestrial Invertebrates
Environmental Science & Technology, 2009The distribution and chemical form (speciation) of arsenic in terrestrial food chains determines both the amount of arsenic available to higher organisms, and the toxicity of this metalloid in affected ecosystems. Invertebrates are part of complex terrestrial food webs.
Maeve M, Moriarty +3 more
openaire +2 more sources
Speciation of arsenic in the atmosphere
Toxicological & Environmental Chemistry, 1994In this paper is presented a study of speciation of arsenic in air, consisting in the separation and determination of arsine, metallic arsenic, inorganic trivalent and pentavalent arsenic, organic monomethylarsonic acid (MMA), dimethylarsinic acid (DMA) and/or their salts.
Spini, Giovanni +4 more
openaire +2 more sources
Arsenic speciation in scallops
Marine Chemistry, 1999Abstract The arsenic species present in the muscle and the gonad of scallops collected near Newfoundland were characterized by using high performance liquid chromatography-inductively coupled plasma-mass spectrometry (HPLC-ICP-MS). The adductor muscle of the scallops (2.1–9.4 μg As g −1 ) contains arsenobetaine (AsB) as the major water-soluble ...
Vivian W.-M. Lai +2 more
openaire +1 more source
2009
Environmentally and biologically important organoarsenicals such as arsenobetaine, arsenocholine, arsenosugars, and the tetramethylarsonium ion do not form volatile hydrides on treatment with sodium borohydride, even though hydride generation is a commonly used analytical technique for arsenic.
openaire +1 more source
Environmentally and biologically important organoarsenicals such as arsenobetaine, arsenocholine, arsenosugars, and the tetramethylarsonium ion do not form volatile hydrides on treatment with sodium borohydride, even though hydride generation is a commonly used analytical technique for arsenic.
openaire +1 more source
Arsenic speciation in plants growing in arsenic-contaminated sites
Chemosphere, 2008Concentrations of total arsenic and of arsenic species were determined by ICPMS and HPLC-ICPMS in terrestrial plant samples. The arsenic concentration in plant samples from the contaminated sites ranged from 1.14 to 98.5 mg kg(-1) (dry mass). However, a very high value, exceeding largely this range was found in a moss sample growing in the contaminated
Maria José, Ruiz-Chancho +5 more
openaire +2 more sources
Arsenic distribution and speciation in Daphnia pulex
Science of The Total Environment, 2012Rat Lake, Yellowknife, Northwest Territories, is situated on arsenic-rich tailings from a historical gold mine. The abundant zooplankton species Daphnia pulex in this lake was used to study the impact of arsenic at the base of the freshwater food web; the speciation and distribution of arsenic in D.
Guilhem, Caumette +3 more
openaire +2 more sources
Arsenic speciation in municipal landfill leachate
Chemosphere, 2010Arsenic species in municipal landfill leachates (MLL) were investigated by HPLC-DRC-ICPMS and LC-ESI-MS/MS. Various arsenic species including arsenate (iAs(V)), arsenite (iAs(III)), monomethylarsonic acid (MMA(V)), dimethylarsinic acid (DMA(V)), as well as sulfur-containing organoarsenic species were detected. Two sulfur-containing arsenic species in a
Yarong, Li +3 more
openaire +2 more sources
[Arsenic speciation and valence].
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2023As arsenic widely exists in nature and has been used in the pharmaceutical preparations, the traditional Chinese medicine(TCM) with arsenic include realgar(As_2S_2 or As_4S_4), orpiment(As_2S_3), and white arsenic(As_2O_3). Among the above representative medicine, the TCM compound formulas with realgar are utilized extensively.
Jing, Liu +9 more
openaire +1 more source
Arsenic speciation patterns in freshwater fish
Talanta, 2004Muscle of 16 freshwater fish (9 different species belonging to 4 different families) was analysed for arsenic species using HPLC separation (anion and cation exchange) followed by on-line UV-decomposition, hydride generation and AFS detection. The main arsenic compounds found in the extracts were arsenobetaine (AsB), which accounted for 92-100% of ...
Zdenka, Slejkovec +2 more
openaire +2 more sources
Speciation analysis of arsenic in landfill leachate
Water Research, 2007As environmental impacts of landfill last from beginning of cell filling to many years after, there is an increasing interest in monitoring landfill leachate composition especially with regards to metals and metalloids. High-performance liquid chromatography (HPLC) coupled with inductively coupled plasma mass spectrometry (ICP-MS) has been applied to ...
Ponthieu, M. +6 more
openaire +3 more sources