An evaluation of column chromatography and flameless atomic absorption spectrophotometry for arsenic speciation as applied to aquatic systems

Iverson, Dennis G.; Anderson, Marc A.; Holm, Thomas R.; Stanforth, Robert

doi:10.1021/es60160a012

Cited by 51 publications

(12 citation statements)

References 20 publications

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“…Further development of chromatographic methods based on ion exchange for separation of As(V), MMAs(V) and DMAs(V) were reported (Yamamoto, 1975). With the advent of differential pulse polarography (voltammetry) hydride generation AAS and graphite furnace AAS, greater sensitivity was also achieved (Iverson et al 1979 ). The analytical techniques now available allowed some progress in the elucidation of arsenic behaviour.…”

Section: Case Study 2 -Arsenicmentioning

confidence: 99%

Evolution of chemical contaminant and toxicology studies, part 2 - case studies of Selenium and Arsenic

O'Brien¹,

Jolley²,

Morrison³

2003

S. Pac. J. Nat. App. Sci.

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As the second of a two part series discussing the evolution of the field of environmental toxicology, this paper presents two case studies: selenium and arsenic. Developments over several decades in the understanding of the behaviour of arsenic and selenium in different chemical forms in various compartments of the environment are discussed. Selenium was initially thought to be toxic, but later investigations showed it to be an essential micronutrient with a variety of biochemical functions, and, importantly, that there is a very narrow gap between the essential and the toxic body burden. Arsenic, on the other hand, has not yet had an essential role established, but enjoys an interesting and notorious history of usage. Arsenic contamination of the drinking water supplies for many millions of people has been a major catalyst for much research into understanding arsenic chemistry in aquifer systems and also arsenic metabolism and toxicity. The relationships between chemical form, bioavailability, toxicity and metabolism of these two semi-metals are being established, especially with use of sophisticated and sensitive analytical instrumentation and biochemical techniques.

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Section: Case Study 2 -Arsenicmentioning

confidence: 99%

Evolution of chemical contaminant and toxicology studies, part 2 - case studies of Selenium and Arsenic

O'Brien¹,

Jolley²,

Morrison³

2003

S. Pac. J. Nat. App. Sci.

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“…Iverson et a1. (19) have developed another column chromatography-flame less AA spectroscopic technique for speciation of inorganic arsenic, m1A and DHA. Reported detection limits are 2 ppb of…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately the addition of a concentration step, as observed for many other arsenic speciation methods (8,18,19,20), increases the length of analYGis time and defeats one of the goals of this study, to develop a rapid method for inorganic arsenic speciation. Further study is needed in this area to examine the stoichiometry of the arsenic intermetallic deposits and the relationship between the stoichiometry and hydrogen gas evolution.…”

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confidence: 99%

Electrochemical methods for speciation of inorganic arsenic

D'Arcy¹

2000

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studies challenging, enriching, and enjoyable. I would like to especially thank Dr. David K. Roe. His guidance, patience, and knowledge were the stimulus for this work. I would like to thank Dr. Bruce Brown and his wife Barbara for their encouragement and friendship. Dr. Brown and I endured many long miles and tall tales. The camaraderie I shared with my fellow graduate students was supportive. Mario Aparicio was always ready to answer my questions, give advice or challenge me to run that last mile.

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“…The resulting methylated-arsenic compounds are widely distributed in soils, sediments, water, and organisms of the environment (TAKAMATSU et al, 1982a;BRAMAN and FOREBACK, 1973;SHAIKH and TALLMAN, 1978;IvERSON et al, 1979). Since organic arsenic compounds, particularly DMA, are adsorbed to a much lesser degree than arsenate by soils and sediments (WAUGHOPE, 1975;ANDERSON et at., 1978), they can easily be solubilized and transported in the hydrosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the measurements of DMA and MMA in the environment may provide useful information on the global cycle of arsenic. Although sediments have been analysed by some authors (IvERSON et al, 1979;MAHER, 1981;TAKAMATSU et at., 1982b), the depth profiles of DMA and MMA have never been described for lake sediments.…”

Section: Introductionmentioning

confidence: 99%

Depth profiles of dimethylarsinate, monomethylarsonate, and inorganic arsenic in sediment from Lake Biwa.

et al. 1985

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An evaluation of column chromatography and flameless atomic absorption spectrophotometry for arsenic speciation as applied to aquatic systems

Cited by 51 publications

References 20 publications

Evolution of chemical contaminant and toxicology studies, part 2 - case studies of Selenium and Arsenic

Evolution of chemical contaminant and toxicology studies, part 2 - case studies of Selenium and Arsenic

Electrochemical methods for speciation of inorganic arsenic

Depth profiles of dimethylarsinate, monomethylarsonate, and inorganic arsenic in sediment from Lake Biwa.

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