
TY  - JOUR
A1  - Tukai, R. 
A1  - Maher, W. A. 
A1  - McNaught, I. J. 
A1  - Ellwood, M. J. 
A1  - Coleman, M. 
T1  - Occurrence and chemical form of arsenic in marine macroalgae from the east coast of Australia
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 2002
VL  - 53
IS  - 6
SP  - 971
EP  - 980
KW  - speciation, arsenoribosides, dimethylarsinic acid.
UR  - https://doi.org/10.1071/MF01230 
N2  - Arsenic concentrations were measured in thirteen macroalgal species from Sydney, Australia. Brown macroalgae contained, on average, more arsenic (range, mean &#177; s.e.: 5&#8211;173 &#956;g g&#8211;1, 39 &#177; 4 &#956;g g&#8211;1) than either green (0.12&#8211;30.2 &#956;g g&#8211;1, 10.7 &#177; 0.7 &#956;g g&#8211;1) or red macroalgae (0.11&#8211;16.9 &#956;g g&#8211;1, 4.3 &#177; 0.3 &#956;g g&#8211;1). Despite the overlap in arsenic concentrations between different macroalgal species, inter-species arsenic variation was apparent with arsenic concentrations following the order brown &#62; green &#62; red macroalgal species. It was concluded that the main contribution to the variation in arsenic concentration was from natural variability expected to occur between individuals of any species as a result of physiological differences.Most of the arsenic compounds in macroalgae (70&#8211;108%) could be extracted using methanol/water mixtures, with 38&#8211;95% of the arsenic compounds present in characterizable forms. All macroalgal species contained arsenoribosides (9&#8211;99%). The distribution of arsenoribosides followed a general pattern; glycerol-arsenoriboside and phosphate-arsenoriboside were common to all macroalgal species. Sulfonate-arsenoriboside and sulfate-arsenoriboside were found in brown macroalgal species and one red macroalgal species. Six macroalgal species contained high concentrations of inorganic arsenic (14.2&#8211;62.9%) and four species contained high concentrations of dimethylarsinic acid (13.3&#8211;41.1%). The variation in the distribution of arsenic compounds in marine macroalgal species appears to be related to taxonomic differences in storage and structural polysaccharides. 
ER  -

