Arsenic speciation patterns in freshwater fish

Šlejkovec, Zdenka; Bajc, Zlatka; Doganoc, Darinka Z.

doi:10.1016/j.talanta.2003.10.012

Cited by 89 publications

(42 citation statements)

References 17 publications

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“…Kaise et al (1997) found that the major arsenic species present in four different species of freshwater fish were TMA compounds (55.5-78.4% of total arsenic) followed by DMA (0.8.-43.2% of total arsenic). Slejkovec et al (2004) investigated nine different freshwater fish species belonging to four different families and found the major organic arsenic species in salmonids was AsB (92-100% of extractable arsenic) and in burbot (Lota lota) was DMA (75% of extractable arsenic). However, it is also noted DMA and TMAO were not detected or detected at very low concentrations (≤32 and 4.4 ng/g, respectively) and most of the arsenic species in silurids and cyprinids were unidentified (Slejkovec et al 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Slejkovec et al (2004) investigated nine different freshwater fish species belonging to four different families and found the major organic arsenic species in salmonids was AsB (92-100% of extractable arsenic) and in burbot (Lota lota) was DMA (75% of extractable arsenic). However, it is also noted DMA and TMAO were not detected or detected at very low concentrations (≤32 and 4.4 ng/g, respectively) and most of the arsenic species in silurids and cyprinids were unidentified (Slejkovec et al 2004). Recent investigations on four different freshwater fish species, including pike, suggest that 10 to 35% of the arsenic in the muscle are tetramethylated arsenic compounds, and only a small fraction (<7%) is trimethylated arsenic oxide (Zheng and Hintelmann 2004).…”

Section: Discussionmentioning

confidence: 99%

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Arsenic concentration and speciation in five freshwater fish species from Back Bay near Yellowknife, NT, CANADA

Rosemond

Xie

Liber

2008

Environ Monit Assess

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The concentration of total arsenic and five different arsenic species [As(III), As(V), monomethylarsonic acid (MMA), dimethylarsenic acid (DMA), and arsenobetaine (AsB)], were measured in the muscle, liver and gastrointestinal tract (GIT) of five different fish species [lake whitefish (Coregonus clupeaformis), walleye (Stizostedion vitreum), northern pike (Esox lucius), white sucker (Catostomus commersoni) and longnose sucker (Catostomus catostomus)] from Back Bay, Great Slave Lake, near the city of Yellowknife, NT, Canada. The total concentration (dry weight) of arsenic in muscle ranged from 0.57 to 1.15 mg/kg, in the liver from 0.42 to 2.52 mg/kg and in the GIT from 1.48 to 8.92 mg/kg. Among fish species, C. commersoni had significantly higher total arsenic concentrations in the GIT than S. vitreum, E. lucius and C. clupeaformis, and higher total arsenic concentrations in the liver than C. clupeaformis. The mean concentration of As(III) and As(V) in the muscle of all fish ranged from < or =0.01 to 0.05 mg/kg and < or =0.01 to 0.02 mg/kg, respectively, and together comprised < or =7.5% of the total arsenic measured in muscle. The concentrations of MMA were below detection in the muscle of all five fish species. However, AsB and DMA were measured in all fish species and nearly all fish tissues. The concentrations of AsB ranged from 0.01 to 0.13 mg/kg and the concentrations of DMA ranged from <0.02 to 0.45 mg/kg. The majority (>50%) of organic arsenic in almost all of the tissues from fish caught in Back Bay was not directly identified. Evidence from the literature suggests that most of these other organic arsenic species were likely trimethylated arsenic compounds, however, further analytical work would need to be performed to verify this hypothesis.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Arsenic concentration and speciation in five freshwater fish species from Back Bay near Yellowknife, NT, CANADA

Rosemond

Xie

Liber

2008

Environ Monit Assess

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“…Arsenobetaine has not yet been detected in seawater although it is likely present at trace levels. There have also been several reports of arsenobetaine in freshwater organisms (Slejkovec et al, 2004;Schaeffer et al, 2006), although the levels are generally low (<0.1 mg arsenic/kg dry mass), much lower than those found in marine samples. Farmed freshwater fish (aquaculture products) can contain arsenobetaine at higher concentrations because they are provided with feed containing marine ingredients (Soeroes et al, 2005).…”

Section: Arsenobetainementioning

confidence: 98%

Scientific Opinion on Arsenic in Food

2009

EFSA Journal

864

220

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The EFSA Panel on Contaminants in the Food Chain (CONTAM Panel) assessed the risks to human health related to the presence of arsenic in food. More than 100,000 occurrence data on arsenic in food were considered with approximately 98 % reported as total arsenic. Making a number of assumptions for the contribution of inorganic arsenic to total arsenic, the inorganic arsenic exposure from food and water across 19 European countries, using lower bound and upper bound concentrations, has been estimated to range from 0.13 to 0.56 µg/kg bodyweight (b.w.) per day for average consumers, and from 0.37 to 1.22 µg/kg b.w. per day for 95 th percentile consumers. Dietary exposure to inorganic arsenic for children under three years of age is in general estimated to be from 2 to 3-fold that of adults. The CONTAM Panel concluded that the provisional tolerable weekly intake (PTWI) of 15 µg/kg b.w. established by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) is no longer appropriate as data had shown that inorganic arsenic causes cancer of the lung and urinary bladder in addition to skin, and that a range of adverse effects had been reported at exposures lower than those reviewed by the JECFA. The CONTAM Panel modelled the dose-response data from key for providing consumption information and calculating exposure, the partners of the EFSA project on the "Individual food consumption data and exposure" coordinated by Ghent University (Department of Public Health, University Hospital, Ghent University, Belgium), and RIKILT (Institute of Food Safety, Wageningen, The Netherlands) for the accessibility of the exposure assessment tools. 4 Table of contents shows now the fourth level of subheadings. 5 An error in the interpretation of the total number of the population in the study of Rahman et al. (2006a) was discovered (Table 41). The BMDL was recalculated and as a consequence it was not considered a potential reference point. The text in the opinion, Table 43 and Appendix were revised accordingly. In addition, the header of the "total number of cases" was replaced by "total number of individuals" in Tables 40-42 and the erroneous units were corrected to µg/L in the text below SUMMARYArsenic is a metalloid that occurs in different inorganic and organic forms, which are found in the environment both from natural occurrence and from anthropogenic activity. The inorganic forms of arsenic are more toxic as compared to the organic arsenic but so far most of the occurrence data in food collected in the framework of official food control are still reported as total arsenic without differentiating the various arsenic species. The need for speciation data is evident because several investigations have shown that especially in seafood most of the arsenic is present in organic forms that are less toxic. Consequently, a risk assessment not taking into account the different species but considering total arsenic as being present exclusively as inorganic arsenic would lead to a considerable overestimation of the health risk rel...

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“…Mild extractants, mainly methanol/water mixtures, have been reported for biological samples: seaweeds, 40 water fish 69 and seafood. 70,71 Photo-oxidation is required to determine the most common arsenic species found in biological samples (e.g.…”

Section: 63mentioning

confidence: 99%

Atomic Fluorescence Spectrometry: a suitable detection technique in speciation studies for arsenic, selenium, antimony and mercury

Sánchez-Rodas

Corns

Chen

et al. 2010

J. Anal. At. Spectrom.

244

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Atomic Fluorescence Spectrometry (AFS) is an ideal detection technique for speciation studies concerning hydride forming elements (mainly As, Se and Sb) and Hg. The analytical features of AFS, such as detection limits below the mg L À1 and the wide linear calibration range, up to the mg L À1, allow its application to a great variety of environmental, biological and food samples. AFS represents a suitable alternative to other atomic spectrometers commonly employed in speciation studies such as Atomic Absorption Spectrometry (AAS) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The instrumentation used for AFS and the design of the vapour generation and optical layouts required to sustain the full benefits of the AFS approach are also described. The present review explains and comments on the instrumental couplings of chromatographic (HPLC and GC) and nonchromatographic separations (CE) with AFS detection, with online hydride generation for the speciation of inorganic and organic compounds of As, Se and Sb, and cold vapour for Hg. Other optional intermediate steps are online photo-oxidation (UV), pyrolysis or Microwave Assisted Digestion (MAD) for non-directly reducible compounds. Many different sample types (e.g. water, soils, air, biota, food) have been analysed using these instrumental couplings with AFS detection. These are summarised and discussed.

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Arsenic speciation patterns in freshwater fish

Cited by 89 publications

References 17 publications

Arsenic concentration and speciation in five freshwater fish species from Back Bay near Yellowknife, NT, CANADA

Arsenic concentration and speciation in five freshwater fish species from Back Bay near Yellowknife, NT, CANADA

Scientific Opinion on Arsenic in Food

Atomic Fluorescence Spectrometry: a suitable detection technique in speciation studies for arsenic, selenium, antimony and mercury

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