Speciation of As(III) and As(V) in biological tissue

Weigert, Peter; Sappl, A.

doi:10.1007/bf00468926

Cited by 9 publications

(2 citation statements)

References 2 publications

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“…Speciation of As(III) and As(V) in biological materials including blood was studied by HNOs-H2SO 4 digestion followed by hydride generation AAS. It was found that the extent of the change of the original valency of As was not reproducible [80].…”

Section: Arsenicmentioning

confidence: 99%

Metal speciation in biological fluids — a review

et al. 1996

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Abstract. The literature on the speciation of metal ions in biological fluids is comprehensively reviewed. Critical examination on this subject reveals that major work has been done in blood and urine. Speciation in materials like milk has not yet been widely studied. On the other hand, only few references could be found on sweat, saliva, cell lysate, cerebrospinal, seminal, tear and bronchoalveolar fluids. The topics studied for these fluids were mainly the speciation of arsenic, mercury, aluminium and selenium. Work on the speciation of other elements like zinc, chromium, cadmium, lead, copper, iron etc. have also been carried out in such matrices. The present literature survey includes also a critical comment about the sampling and storage of the fluids, general methodologies and analytical details of the developed methods for studying such metal ion speciation.

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Section: Arsenicmentioning

confidence: 99%

Metal speciation in biological fluids — a review

et al. 1996

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“…The two adjoining 9 9.9 curves define the 90% confidence interval. 9 h. The samples were then diluted to 18.2 mL with 0.02N BrCI in 10% HCI. Aliquots of from 25 to 200 _L were reduced with SnCI2, and the Hg o then purged onto a gold coated sand trap.…”

Section: One Wasmentioning

confidence: 99%

Measurement of chemical emissions under the influence of low-NO{sub x} combustion modifications. Final report

Dismukes¹

1993

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cobalt, chromium, lead, manganese, mercury, nickel, and selenium. Four other metals-barium, copper, molybdenum, and vanadium-were added to that list. Collectively, these elements were of interest insofar as their total concentrations in various streams were concerned and also insofar as their concentrations in gas streams were divided between the particulate and gas phases. Individually, arsenic, chromium, and mercurywere to be determined as different species-arsenic in the trivalent and pentavalent states, As(m) and As(V), having somewhat uncertain " relative toxicities; chromium in hexavalent form, Cr(VI), which is acutely carcinogenic; and mercury in an Oxidizedstate or the elemental state, which determine whether the effects of mercury emission are likely to occur locally or only at a remote location. Inorganic gases consisting of SOx, I-IF,HCI, HCN, and ammonia (NH3). The first three of these gases are the common forms in which sulfur, fluorine, and chlorine are emitted from a coal combustor. The latter two gases contain nitrogen in reduced states in distinction to the oxidized states found in NOz, the predominant form of emission of nitrogen other than N2. The emission of the latter two gases was presumed to be the possible result of staged combustion to reduce NOx emissions. Aldehydes (notably formaldehyde) and ketones, which are partially oxygenated hydrocarbons. These compounds are lx_ible emissions resulting from the partial oxidation of more complex structures. Volatile organic compounds, which are generally organic compounds with boiling points below 100°C. Formally speaking, volatile organics would include formaldehyde and some of the other aldehydes and ketones. Practically speaking, however, these compounds exclude formaldehyde and may be defined as those compounds that can be collected under the specific sampling conditions employed in EPA's Volatile Organics Sampling Train (VOST). The two specific volatiles of primaryinterest were the two simple aromatic hydrocarbons-benzene and toluene. iv Semi-volatile organic compounds, which generally have boiling points above 100°C. The compounds of paramount interest in this group are known as polynuclear aromatic hydrocarbons (PAHs); they are solids in the pure state at ambient temperature and are not usually thought of in terms of volatility. The PAH with the lowest molecular weight is naphthalene C10H s, which has a melting point of 80°C and a boiling point of 218°C. The PAH with perhaps the longest standing reputation for toxicity, as a carcinogen, is benzo(a)pyrene. All of the above types of compounds were included in the analysis of flue gas streams at the inlet of the hot-side ESP and the outlet of the cold-side ESP. Those elements that are by their nature indestructible in the process of coal combustion were also determined in other materials (coal, feed water, pyrite, bottom ash, and ESP hopper ash). Stream flow rates and element concentrations were used in the calculation of material balances, which were of interest for two reasons: 1) revealing h...

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Species identification for trace inorganic elements in biological materials

Gardiner

1987

Chemometrics and Species Identification

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Speciation of As(III) and As(V) in biological tissue

Cited by 9 publications

References 2 publications

Metal speciation in biological fluids — a review

Metal speciation in biological fluids — a review

Measurement of chemical emissions under the influence of low-NO{sub x} combustion modifications. Final report

Species identification for trace inorganic elements in biological materials

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