Arsenic Speciation in More Than 1600 Freshwater Fish Samples from Fifty-Three Waterbodies in Alberta, Canada

Journal of Environmental Sciences, Journal Year: 2024, Volume and Issue: 153, P. 289 - 301

Published: Dec. 15, 2024

We report here arsenic speciation in 1643 freshwater fish samples, representing 14 common species from 53 waterbodies Alberta, Canada. Arsenic were extracted muscle tissue. the extracts separated using anion-exchange high-performance liquid chromatography (HPLC) and quantified inductively coupled plasma mass spectrometry (ICPMS). The total concentrations ranged 2.8 to 1200 µg/kg (in wet weight of sample) (mean 71 ± 101 µg/kg), which are all below 2000 (wet weight) maximum allowable fish, recommended by Ontario Ministry Environment. In 99.7%, or 1638 samples analyzed, arsenobetaine (AsB) was detectable, with higher than method detection limit 0.25 weight). Dimethylarsinic acid (DMA) detectable (concentration >0.25 µg/kg) 92.1%, 1514 samples. Inorganic arsenate (iAsV) (>0.25 1119 (i.e., 68.1% samples). Monomethylarsonic (MMA) 418 (25.4% varied as much three orders magnitude, ranging 380 for AsB, 150 DMA, 70 iAsV, 51 MMA. AsB made up 46.1% 26.2% species. patterns between lake whitefish, northern pike, walleye, most types analyzed. relative proportion DMA pike larger whitefish conversely, iAsV lower pike. Seven unknown detected, their chromatographic retention time did not match those available standards. At least one detected 33.4%, 549 high 61 µg/kg. Future research is necessary identify determine contributing factors observed concentrations.

Language: Английский

Environmental studies of priority persistent contaminants: A Special Issue dedicated to Professor Chuanyong Jing

Journal of Environmental Sciences, Journal Year: 2024, Volume and Issue: 153, P. 1 - 5

Published: Dec. 28, 2024

Language: Английский