“Assessment of the chemical and biological significance of arsenical compounds in a heavily contaminated watershed part II. Analysis and distribution of several arsenical species.”;

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Abstract
The waters and bottom sediments in the watershed of Union Lake in southern New Jersey [USA] are highly contaminated with substantial quantities of As. Total As contents were as high as 2780 .mu.g/l in the water phase; 2290 .mu.g/l was the highest observed in bottom sediments. Pore water from this bottom sediment was 12,500 .mu.g/l. As contents in the bottom sediments were 4240-fold those found in overlying waters. In sediments, the order of predominance of the 4 As species was: As+5 > As+3 > MMAA [monomethylarsonic acid] > DMAA [dimethyarsinic acid]. In 4 sediments, the inorganic arsenate was 72.8, 81, 84 and 88% of the total arsenical species. In water, the order of predominance was MMAA > As+3, As+5 > DMAA. Difficulties with the analytical procedure for separation of the 4 arsenical species were discussed.

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